changeset 28131:4c21f99b4ad5

handle interleaved complex data and new typed data access functions for mex * mexproto.h, mex.cc, mxarray.h (mxMakeArrayReal, mxMakeArrayComplex, mxGetDoubles, mxGetSingles, mxGetInt8s, mxGetInt16s, mxGetInt32s, mxGetInt64s, mxGetUint8s, mxGetUint16s, mxGetUint32s, mxGetUint64s, mxGetComplexDoubles, mxGetComplexSingles, mxSetDoubles, mxSetSingles, mxSetInt8s, mxSetInt16s, mxSetInt32s, mxSetInt64s, mxSetUint8s, mxSetUint16s, mxSetUint32s, mxSetUint64s, mxSetComplexDoubles, mxSetComplexSingles): New functions. Provide corresponding member functions in mxArray class hierarchy to handle the actual operations. (mxGetComplexInt8s, mxGetComplexInt16s, mxGetComplexInt32s, mxGetComplexInt64s, mxGetComplexUint8s, mxGetComplexUint16s, mxGetComplexUint32s, mxGetComplexUint64s, mxSetComplexInt8s, mxSetComplexInt16s, mxSetComplexInt32s, mxSetComplexInt64s, mxSetComplexUint8s, mxSetComplexUint16s, mxSetComplexUint32s, mxSetComplexUint64s): Add prototypes and functions, but leave commented out since we don't have complex integer data. (class mxArray_number, class mxArray_sparse): Handle interleaved complex data. In mxArray_octave_value and mxArray_matlab constructors, handle interleaved flag in constructor to determine data layout to use when creating mxArray_number or mxArray_sparse objects. (mex::make_value): Check flag in mex function to determine whether to create arrays with interleaved complex. * ov.h, ov.cc, ov-base.h, ov-base.cc, ov-base-diag.h, ov-base-diag.cc, ov-bool-mat.h, ov-bool-mat.cc, ov-bool-sparse.h, ov-bool-sparse.cc, ov-bool.h, ov-bool.cc, ov-cell.h, ov-cell.cc, ov-ch-mat.h, ov-ch-mat.cc, ov-class.h, ov-class.cc, ov-complex.h, ov-complex.cc, ov-cx-mat.h, ov-cx-mat.cc, ov-cx-sparse.h, ov-cx-sparse.cc, ov-float.h, ov-float.cc, ov-flt-complex.h, ov-flt-complex.cc, ov-flt-cx-mat.h, ov-flt-cx-mat.cc, ov-flt-re-mat.h, ov-flt-re-mat.cc, ov-intx.h, ov-lazy-idx.h, ov-perm.h, ov-perm.cc, ov-range.h, ov-range.cc, ov-re-mat.h, ov-re-mat.cc, ov-re-sparse.h, ov-re-sparse.cc, ov-scalar.h, ov-scalar.cc, ov-struct.h, ov-struct.cc: In all as_mxArray methods, handle new interleaved input to optionally create objects that will use interleaved complex data.
author John W. Eaton <jwe@octave.org>
date Tue, 18 Feb 2020 13:16:41 -0500
parents 0a88a4743096
children 1188addabaad
files libinterp/corefcn/mex.cc libinterp/corefcn/mexproto.h libinterp/corefcn/mxarray.h libinterp/octave-value/ov-base-diag.cc libinterp/octave-value/ov-base-diag.h libinterp/octave-value/ov-base.cc libinterp/octave-value/ov-base.h libinterp/octave-value/ov-bool-mat.cc libinterp/octave-value/ov-bool-mat.h libinterp/octave-value/ov-bool-sparse.cc libinterp/octave-value/ov-bool-sparse.h libinterp/octave-value/ov-bool.cc libinterp/octave-value/ov-bool.h libinterp/octave-value/ov-cell.cc libinterp/octave-value/ov-cell.h libinterp/octave-value/ov-ch-mat.cc libinterp/octave-value/ov-ch-mat.h libinterp/octave-value/ov-class.cc libinterp/octave-value/ov-class.h libinterp/octave-value/ov-complex.cc libinterp/octave-value/ov-complex.h libinterp/octave-value/ov-cx-mat.cc libinterp/octave-value/ov-cx-mat.h libinterp/octave-value/ov-cx-sparse.cc libinterp/octave-value/ov-cx-sparse.h libinterp/octave-value/ov-float.cc libinterp/octave-value/ov-float.h libinterp/octave-value/ov-flt-complex.cc libinterp/octave-value/ov-flt-complex.h libinterp/octave-value/ov-flt-cx-mat.cc libinterp/octave-value/ov-flt-cx-mat.h libinterp/octave-value/ov-flt-re-mat.cc libinterp/octave-value/ov-flt-re-mat.h libinterp/octave-value/ov-intx.h libinterp/octave-value/ov-lazy-idx.h libinterp/octave-value/ov-perm.cc libinterp/octave-value/ov-perm.h libinterp/octave-value/ov-range.cc libinterp/octave-value/ov-range.h libinterp/octave-value/ov-re-mat.cc libinterp/octave-value/ov-re-mat.h libinterp/octave-value/ov-re-sparse.cc libinterp/octave-value/ov-re-sparse.h libinterp/octave-value/ov-scalar.cc libinterp/octave-value/ov-scalar.h libinterp/octave-value/ov-struct.cc libinterp/octave-value/ov-struct.h libinterp/octave-value/ov.cc libinterp/octave-value/ov.h
diffstat 49 files changed, 2084 insertions(+), 510 deletions(-) [+]
line wrap: on
line diff
--- a/libinterp/corefcn/mex.cc	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/corefcn/mex.cc	Tue Feb 18 13:16:41 2020 -0500
@@ -62,6 +62,197 @@
 #include "variables.h"
 #include "graphics.h"
 
+// These must be declared extern "C" but may be omitted from the set of
+// symbols declared in mexproto.h, so we declare them here as well.
+
+extern "C"
+{
+  extern OCTINTERP_API const mxArray *
+  mexGet_interleaved (double handle, const char *property);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateCellArray (mwSize ndims, const mwSize *dims);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateCellMatrix (mwSize m, mwSize n);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateCharArray (mwSize ndims, const mwSize *dims);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateCharMatrixFromStrings (mwSize m, const char **str);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateDoubleMatrix (mwSize nr, mwSize nc, mxComplexity flag);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateDoubleScalar (double val);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateLogicalArray (mwSize ndims, const mwSize *dims);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateLogicalMatrix (mwSize m, mwSize n);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateLogicalScalar (mxLogical val);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateNumericArray (mwSize ndims, const mwSize *dims, mxClassID class_id,
+                        mxComplexity flag);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateNumericMatrix (mwSize m, mwSize n, mxClassID class_id,
+                         mxComplexity flag);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateUninitNumericArray (mwSize ndims, const mwSize *dims,
+                              mxClassID class_id, mxComplexity flag);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateUninitNumericMatrix (mwSize m, mwSize n, mxClassID class_id,
+                               mxComplexity flag);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateSparse (mwSize m, mwSize n, mwSize nzmax, mxComplexity flag);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateSparseLogicalMatrix (mwSize m, mwSize n, mwSize nzmax);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateString (const char *str);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateStructArray (mwSize ndims, const mwSize *dims, int num_keys,
+                       const char **keys);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateStructMatrix (mwSize rows, mwSize cols, int num_keys,
+                        const char **keys);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateCellArray_interleaved (mwSize ndims, const mwSize *dims);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateCellMatrix_interleaved (mwSize m, mwSize n);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateCharArray_interleaved (mwSize ndims, const mwSize *dims);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateCharMatrixFromStrings_interleaved (mwSize m, const char **str);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateDoubleMatrix_interleaved (mwSize nr, mwSize nc, mxComplexity flag);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateDoubleScalar_interleaved (double val);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateLogicalArray_interleaved (mwSize ndims, const mwSize *dims);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateLogicalMatrix_interleaved (mwSize m, mwSize n);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateLogicalScalar_interleaved (mxLogical val);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateNumericArray_interleaved (mwSize ndims, const mwSize *dims,
+                                    mxClassID class_id, mxComplexity flag);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateNumericMatrix_interleaved (mwSize m, mwSize n, mxClassID class_id,
+                                     mxComplexity flag);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateUninitNumericArray_interleaved (mwSize ndims, const mwSize *dims,
+                                          mxClassID class_id,
+                                          mxComplexity flag);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateUninitNumericMatrix_interleaved (mwSize m, mwSize n,
+                                           mxClassID class_id,
+                                           mxComplexity flag);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateSparse_interleaved (mwSize m, mwSize n, mwSize nzmax,
+                              mxComplexity flag);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateSparseLogicalMatrix_interleaved (mwSize m, mwSize n, mwSize nzmax);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateString_interleaved (const char *str);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateStructArray_interleaved (mwSize ndims, const mwSize *dims,
+                                   int num_keys, const char **keys);
+
+  extern OCTINTERP_API mxArray *
+  mxCreateStructMatrix_interleaved (mwSize rows, mwSize cols, int num_keys,
+                                    const char **keys);
+
+  extern OCTINTERP_API int mxMakeArrayReal (mxArray *ptr);
+  extern OCTINTERP_API int mxMakeArrayComplex (mxArray *ptr);
+
+  extern OCTINTERP_API mxDouble * mxGetDoubles (const mxArray *p);
+  extern OCTINTERP_API mxSingle * mxGetSingles (const mxArray *p);
+  extern OCTINTERP_API mxInt8 * mxGetInt8s (const mxArray *p);
+  extern OCTINTERP_API mxInt16 * mxGetInt16s (const mxArray *p);
+  extern OCTINTERP_API mxInt32 * mxGetInt32s (const mxArray *p);
+  extern OCTINTERP_API mxInt64 * mxGetInt64s (const mxArray *p);
+  extern OCTINTERP_API mxUint8 * mxGetUint8s (const mxArray *p);
+  extern OCTINTERP_API mxUint16 * mxGetUint16s (const mxArray *p);
+  extern OCTINTERP_API mxUint32 * mxGetUint32s (const mxArray *p);
+  extern OCTINTERP_API mxUint64 * mxGetUint64s (const mxArray *p);
+
+  extern OCTINTERP_API mxComplexDouble * mxGetComplexDoubles (const mxArray *p);
+  extern OCTINTERP_API mxComplexSingle * mxGetComplexSingles (const mxArray *p);
+#if 0
+  /* We don't have these yet. */
+  extern OCTINTERP_API mxComplexInt8 * mxGetComplexInt8s (const mxArray *p);
+  extern OCTINTERP_API mxComplexInt16 * mxGetComplexInt16s (const mxArray *p);
+  extern OCTINTERP_API mxComplexInt32 * mxGetComplexInt32s (const mxArray *p);
+  extern OCTINTERP_API mxComplexInt64 * mxGetComplexInt64s (const mxArray *p);
+  extern OCTINTERP_API mxComplexUint8 * mxGetComplexUint8s (const mxArray *p);
+  extern OCTINTERP_API mxComplexUint16 * mxGetComplexUint16s (const mxArray *p);
+  extern OCTINTERP_API mxComplexUint32 * mxGetComplexUint32s (const mxArray *p);
+  extern OCTINTERP_API mxComplexUint64 * mxGetComplexUint64s (const mxArray *p);
+#endif
+
+  extern OCTINTERP_API double * mxGetPi (const mxArray *ptr);
+  extern OCTINTERP_API void * mxGetImagData (const mxArray *ptr);
+
+  extern OCTINTERP_API int mxSetDoubles (mxArray *p, mxDouble *d);
+  extern OCTINTERP_API int mxSetSingles (mxArray *p, mxSingle *d);
+  extern OCTINTERP_API int mxSetInt8s (mxArray *p, mxInt8 *d);
+  extern OCTINTERP_API int mxSetInt16s (mxArray *p, mxInt16 *d);
+  extern OCTINTERP_API int mxSetInt32s (mxArray *p, mxInt32 *d);
+  extern OCTINTERP_API int mxSetInt64s (mxArray *p, mxInt64 *d);
+  extern OCTINTERP_API int mxSetUint8s (mxArray *p, mxUint8 *d);
+  extern OCTINTERP_API int mxSetUint16s (mxArray *p, mxUint16 *d);
+  extern OCTINTERP_API int mxSetUint32s (mxArray *p, mxUint32 *d);
+  extern OCTINTERP_API int mxSetUint64s (mxArray *p, mxUint64 *d);
+
+  extern OCTINTERP_API int mxSetComplexDoubles (mxArray *p, mxComplexDouble *d);
+  extern OCTINTERP_API int mxSetComplexSingles (mxArray *p, mxComplexSingle *d);
+#if 0
+  /* We don't have these yet. */
+  extern OCTINTERP_API int mxSetComplexInt8s (mxArray *p, mxComplexInt8 *d);
+  extern OCTINTERP_API int mxSetComplexInt16s (mxArray *p, mxComplexInt16 *d);
+  extern OCTINTERP_API int mxSetComplexInt32s (mxArray *p, mxComplexInt32 *d);
+  extern OCTINTERP_API int mxSetComplexInt64s (mxArray *p, mxComplexInt64 *d);
+  extern OCTINTERP_API int mxSetComplexUint8s (mxArray *p, mxComplexUint8 *d);
+  extern OCTINTERP_API int mxSetComplexUint16s (mxArray *p, mxComplexUint16 *d);
+  extern OCTINTERP_API int mxSetComplexUint32s (mxArray *p, mxComplexUint32 *d);
+  extern OCTINTERP_API int mxSetComplexUint64s (mxArray *p, mxComplexUint64 *d);
+#endif
+
+  extern OCTINTERP_API void mxSetPi (mxArray *ptr, double *pi);
+  extern OCTINTERP_API void mxSetImagData (mxArray *ptr, void *pi);
+}
+
 // #define DEBUG 1
 
 static void
@@ -112,6 +303,10 @@
 
 // ------------------------------------------------------------------
 
+mxArray_base::mxArray_base (bool interleaved)
+  : m_interleaved (interleaved)
+{ }
+
 static mwIndex
 calc_single_subscript_internal (mwSize ndims, const mwSize *dims,
                                 mwSize nsubs, const mwIndex *subs)
@@ -157,13 +352,26 @@
 
 static inline void * maybe_mark_foreign (void *ptr);
 
+#define VOID_MUTATION_METHOD(FCN_NAME, ARG_LIST)        \
+  void FCN_NAME ARG_LIST { request_mutation (); }
+
+#define CONST_VOID_MUTATION_METHOD(FCN_NAME, ARG_LIST)  \
+  void FCN_NAME ARG_LIST const { request_mutation (); }
+
+#define MUTATION_METHOD(RET_TYPE, FCN_NAME, ARG_LIST, RET_VAL)          \
+  RET_TYPE FCN_NAME ARG_LIST { request_mutation (); return RET_VAL; }
+
+#define CONST_MUTATION_METHOD(RET_TYPE, FCN_NAME, ARG_LIST, RET_VAL)    \
+  RET_TYPE FCN_NAME ARG_LIST const { request_mutation (); return RET_VAL; }
+
 class mxArray_octave_value : public mxArray_base
 {
 public:
 
-  mxArray_octave_value (const octave_value& ov)
-    : mxArray_base (), val (ov), mutate_flag (false),
-      id (mxUNKNOWN_CLASS), class_name (nullptr), ndims (-1), dims (nullptr) { }
+  mxArray_octave_value (bool interleaved, const octave_value& ov)
+    : mxArray_base (interleaved), val (ov), mutate_flag (false),
+      id (mxUNKNOWN_CLASS), class_name (nullptr), ndims (-1), dims (nullptr)
+  { }
 
   // No assignment!  FIXME: should this be implemented?  Note that we
   // do have a copy constructor.
@@ -174,7 +382,7 @@
 
   mxArray * as_mxArray (void) const
   {
-    mxArray *retval = val.as_mxArray ();
+    mxArray *retval = val.as_mxArray (m_interleaved);
 
     // RETVAL is assumed to be an mxArray_matlab object.  Should we
     // assert that condition here?
@@ -303,16 +511,10 @@
     return ndims;
   }
 
-  void set_m (mwSize /*m*/) { request_mutation (); }
-
-  void set_n (mwSize /*n*/) { request_mutation (); }
-
-  int set_dimensions (mwSize * /*dims_arg*/, mwSize /*ndims_arg*/)
-  {
-    request_mutation ();
-
-    return 0;
-  }
+  VOID_MUTATION_METHOD (set_m, (mwSize))
+  VOID_MUTATION_METHOD (set_n, (mwSize))
+
+  MUTATION_METHOD (int, set_dimensions, (mwSize *, mwSize), 0)
 
   mwSize get_number_of_elements (void) const { return val.numel (); }
 
@@ -378,7 +580,7 @@
   }
 
   // Not allowed.
-  void set_class_name (const char * /*name_arg*/) { request_mutation (); }
+  VOID_MUTATION_METHOD (set_class_name, (const char *))
 
   mxArray * get_property (mwIndex idx, const char *pname) const
   {
@@ -393,7 +595,7 @@
             octave_value pval = ov_cdef->get_property (idx, pname);
 
             if (pval.is_defined())
-              retval = new mxArray (pval);
+              retval = new mxArray (m_interleaved, pval);
           }
       }
 
@@ -410,17 +612,13 @@
           ov_cdef->set_property (idx, pname, pval->as_octave_value ());
       }
     else
-      err_invalid_type ();
+      err_invalid_type ("set_property");
   }
 
-  mxArray * get_cell (mwIndex /*idx*/) const
-  {
-    request_mutation ();
-    return nullptr;
-  }
+  CONST_MUTATION_METHOD (mxArray *, get_cell, (mwIndex), nullptr)
 
   // Not allowed.
-  void set_cell (mwIndex /*idx*/, mxArray * /*val*/) { request_mutation (); }
+  VOID_MUTATION_METHOD (set_cell, (mwIndex, mxArray *))
 
   double get_scalar (void) const
   {
@@ -454,6 +652,61 @@
     return retval;
   }
 
+  template <typename T>
+  T * get_data (mxClassID class_id, mxComplexity complexity) const
+  {
+    T *retval = static_cast<T *> (val.mex_get_data (class_id, complexity));
+
+    if (retval)
+      maybe_mark_foreign (retval);
+    else
+      request_mutation ();
+
+    return retval;
+  }
+
+  CONST_MUTATION_METHOD (mxDouble *, get_doubles, (void), nullptr);
+
+  CONST_MUTATION_METHOD (mxSingle *, get_singles, (void), nullptr);
+
+  CONST_MUTATION_METHOD (mxInt8 *, get_int8s, (void), nullptr);
+
+  CONST_MUTATION_METHOD (mxInt16 *, get_int16s, (void), nullptr);
+
+  CONST_MUTATION_METHOD (mxInt32 *, get_int32s, (void), nullptr);
+
+  CONST_MUTATION_METHOD (mxInt64 *, get_int64s, (void), nullptr);
+
+  CONST_MUTATION_METHOD (mxUint8 *, get_uint8s, (void), nullptr);
+
+  CONST_MUTATION_METHOD (mxUint16 *, get_uint16s, (void), nullptr);
+
+  CONST_MUTATION_METHOD (mxUint32 *, get_uint32s, (void), nullptr);
+
+  CONST_MUTATION_METHOD (mxUint64 *, get_uint64s, (void), nullptr);
+
+  CONST_MUTATION_METHOD (mxComplexDouble *, get_complex_doubles, (void), nullptr);
+  CONST_MUTATION_METHOD (mxComplexSingle *, get_complex_singles, (void), nullptr);
+
+#if 0
+  /* We don't have these yet. */
+  CONST_MUTATION_METHOD (mxComplexInt8 *, get_complex_int8s, (void), nullptr);
+
+  CONST_MUTATION_METHOD (mxComplexInt16 *, get_complex_int16s, (void), nullptr);
+
+  CONST_MUTATION_METHOD (mxComplexInt32 *, get_complex_int32s, (void), nullptr);
+
+  CONST_MUTATION_METHOD (mxComplexInt64 *, get_complex_int64s, (void), nullptr);
+
+  CONST_MUTATION_METHOD (mxComplexUint8 *, get_complex_uint8s, (void), nullptr);
+
+  CONST_MUTATION_METHOD (mxComplexUint16 *, get_complex_uint16s, (void), nullptr);
+
+  CONST_MUTATION_METHOD (mxComplexUint32 *, get_complex_uint32s, (void), nullptr);
+
+  CONST_MUTATION_METHOD (mxComplexUint64 *, get_complex_uint64s, (void), nullptr);
+#endif
+
   void * get_imag_data (void) const
   {
     void *retval = nullptr;
@@ -467,10 +720,35 @@
   }
 
   // Not allowed.
-  void set_data (void * /*pr*/) { request_mutation (); }
+  VOID_MUTATION_METHOD (set_data, (void *))
+
+  MUTATION_METHOD (int, set_doubles, (mxDouble *), 0)
+  MUTATION_METHOD (int, set_singles, (mxSingle *), 0)
+  MUTATION_METHOD (int, set_int8s, (mxInt8 *), 0)
+  MUTATION_METHOD (int, set_int16s, (mxInt16 *), 0)
+  MUTATION_METHOD (int, set_int32s, (mxInt32 *), 0)
+  MUTATION_METHOD (int, set_int64s, (mxInt64 *), 0)
+  MUTATION_METHOD (int, set_uint8s, (mxUint8 *), 0)
+  MUTATION_METHOD (int, set_uint16s, (mxUint16 *), 0)
+  MUTATION_METHOD (int, set_uint32s, (mxUint32 *), 0)
+  MUTATION_METHOD (int, set_uint64s, (mxUint64 *), 0)
+
+  MUTATION_METHOD (int, set_complex_doubles, (mxComplexDouble *), 0)
+  MUTATION_METHOD (int, set_complex_singles, (mxComplexSingle *), 0)
+#if 0
+  /* We don't have these yet. */
+  MUTATION_METHOD (int, set_complex_int8s, (mxComplexInt8 *), 0)
+  MUTATION_METHOD (int, set_complex_int16s, (mxComplexInt16 *), 0)
+  MUTATION_METHOD (int, set_complex_int32s, (mxComplexInt32 *), 0)
+  MUTATION_METHOD (int, set_complex_int64s, (mxComplexInt64 *), 0)
+  MUTATION_METHOD (int, set_complex_uint8s, (mxComplexUint8 *), 0)
+  MUTATION_METHOD (int, set_complex_uint16s, (mxComplexUint16 *), 0)
+  MUTATION_METHOD (int, set_complex_uint32s, (mxComplexUint32 *), 0)
+  MUTATION_METHOD (int, set_complex_uint64s, (mxComplexUint64 *), 0)
+#endif
 
   // Not allowed.
-  void set_imag_data (void * /*pi*/) { request_mutation (); }
+  VOID_MUTATION_METHOD (set_imag_data, (void *))
 
   mwIndex * get_ir (void) const
   {
@@ -485,50 +763,30 @@
   mwSize get_nzmax (void) const { return val.nzmax (); }
 
   // Not allowed.
-  void set_ir (mwIndex * /*ir*/) { request_mutation (); }
-
-  // Not allowed.
-  void set_jc (mwIndex * /*jc*/) { request_mutation (); }
+  VOID_MUTATION_METHOD (set_ir, (mwIndex *))
 
   // Not allowed.
-  void set_nzmax (mwSize /*nzmax*/) { request_mutation (); }
+  VOID_MUTATION_METHOD (set_jc, (mwIndex *))
 
   // Not allowed.
-  int add_field (const char * /*key*/)
-  {
-    request_mutation ();
-    return 0;
-  }
+  VOID_MUTATION_METHOD (set_nzmax, (mwSize))
+
+  // Not allowed.
+  MUTATION_METHOD (int, add_field, (const char *), 0)
 
   // Not allowed.
-  void remove_field (int /*key_num*/) { request_mutation (); }
-
-  mxArray * get_field_by_number (mwIndex /*index*/, int /*key_num*/) const
-  {
-    request_mutation ();
-    return nullptr;
-  }
+  VOID_MUTATION_METHOD (remove_field, (int))
+
+  CONST_MUTATION_METHOD (mxArray *, get_field_by_number, (mwIndex, int), nullptr)
 
   // Not allowed.
-  void set_field_by_number (mwIndex /*index*/, int /*key_num*/,
-                            mxArray * /*val*/)
-  {
-    request_mutation ();
-  }
+  VOID_MUTATION_METHOD (set_field_by_number, (mwIndex, int, mxArray *))
 
   int get_number_of_fields (void) const { return val.nfields (); }
 
-  const char * get_field_name_by_number (int /*key_num*/) const
-  {
-    request_mutation ();
-    return nullptr;
-  }
-
-  int get_field_number (const char * /*key*/) const
-  {
-    request_mutation ();
-    return 0;
-  }
+  CONST_MUTATION_METHOD (const char *, get_field_name_by_number, (int), nullptr)
+
+  CONST_MUTATION_METHOD (int, get_field_number, (const char *), 0)
 
   int get_string (char *buf, mwSize buflen) const
   {
@@ -596,21 +854,21 @@
 
     switch (id)
       {
-      case mxDOUBLE_CLASS: return sizeof (double);
-      case mxSINGLE_CLASS: return sizeof (float);
-      case mxCHAR_CLASS: return sizeof (mxChar);
-      case mxLOGICAL_CLASS: return sizeof (mxLogical);
       case mxCELL_CLASS: return sizeof (mxArray *);
       case mxSTRUCT_CLASS: return sizeof (mxArray *);
+      case mxLOGICAL_CLASS: return sizeof (mxLogical);
+      case mxCHAR_CLASS: return sizeof (mxChar);
+      case mxDOUBLE_CLASS: return get_numeric_element_size (sizeof (mxDouble));
+      case mxSINGLE_CLASS: return get_numeric_element_size (sizeof (mxSingle));
+      case mxINT8_CLASS: return get_numeric_element_size (sizeof (mxInt8));
+      case mxUINT8_CLASS: return get_numeric_element_size (sizeof (mxUint8));
+      case mxINT16_CLASS: return get_numeric_element_size (sizeof (mxInt16));
+      case mxUINT16_CLASS: return get_numeric_element_size (sizeof (mxUint16));
+      case mxINT32_CLASS: return get_numeric_element_size (sizeof (mxInt32));
+      case mxUINT32_CLASS: return get_numeric_element_size (sizeof (mxUint32));
+      case mxINT64_CLASS: return get_numeric_element_size (sizeof (mxInt64));
+      case mxUINT64_CLASS: return get_numeric_element_size (sizeof (mxUint64));
       case mxFUNCTION_CLASS: return 0;
-      case mxINT8_CLASS: return 1;
-      case mxUINT8_CLASS: return 1;
-      case mxINT16_CLASS: return 2;
-      case mxUINT16_CLASS: return 2;
-      case mxINT32_CLASS: return 4;
-      case mxUINT32_CLASS: return 4;
-      case mxINT64_CLASS: return 8;
-      case mxUINT64_CLASS: return 8;
       // FIXME: user-defined objects need their own class ID.
       //        What should they return, size of pointer?
       default: return 0;
@@ -637,9 +895,9 @@
     : mxArray_base (arg), val (arg.val), mutate_flag (arg.mutate_flag),
       id (arg.id), class_name (mxArray::strsave (arg.class_name)),
       ndims (arg.ndims),
-      dims (ndims > 0 ? static_cast<mwSize *>
-                         (mxArray::malloc (ndims * sizeof (mwSize)))
-                      : nullptr)
+      dims (ndims > 0
+            ? static_cast<mwSize *> (mxArray::malloc (ndims * sizeof (mwSize)))
+            : nullptr)
   {
     if (dims)
       {
@@ -671,13 +929,14 @@
 {
 protected:
 
-  mxArray_matlab (mxClassID id_arg = mxUNKNOWN_CLASS)
-    : mxArray_base (), class_name (nullptr), id (id_arg), ndims (0),
+  mxArray_matlab (bool interleaved, mxClassID id_arg = mxUNKNOWN_CLASS)
+    : mxArray_base (interleaved), class_name (nullptr), id (id_arg), ndims (0),
       dims (nullptr)
   { }
 
-  mxArray_matlab (mxClassID id_arg, mwSize ndims_arg, const mwSize *dims_arg)
-    : mxArray_base (), class_name (nullptr), id (id_arg),
+  mxArray_matlab (bool interleaved, mxClassID id_arg, mwSize ndims_arg,
+                  const mwSize *dims_arg)
+    : mxArray_base (interleaved), class_name (nullptr), id (id_arg),
       ndims (ndims_arg < 2 ? 2 : ndims_arg),
       dims (static_cast<mwSize *> (mxArray::malloc (ndims * sizeof (mwSize))))
   {
@@ -704,8 +963,8 @@
       }
   }
 
-  mxArray_matlab (mxClassID id_arg, const dim_vector& dv)
-    : mxArray_base (), class_name (nullptr), id (id_arg),
+  mxArray_matlab (bool interleaved, mxClassID id_arg, const dim_vector& dv)
+    : mxArray_base (interleaved), class_name (nullptr), id (id_arg),
       ndims (dv.ndims ()),
       dims (static_cast<mwSize *> (mxArray::malloc (ndims * sizeof (mwSize))))
   {
@@ -721,8 +980,8 @@
       }
   }
 
-  mxArray_matlab (mxClassID id_arg, mwSize m, mwSize n)
-    : mxArray_base (), class_name (nullptr), id (id_arg), ndims (2),
+  mxArray_matlab (bool interleaved, mxClassID id_arg, mwSize m, mwSize n)
+    : mxArray_base (interleaved), class_name (nullptr), id (id_arg), ndims (2),
       dims (static_cast<mwSize *> (mxArray::malloc (ndims * sizeof (mwSize))))
   {
     dims[0] = m;
@@ -900,98 +1159,304 @@
 
   mxArray * get_cell (mwIndex /*idx*/) const
   {
-    err_invalid_type ();
+    err_invalid_type ("get_cell");
   }
 
   void set_cell (mwIndex /*idx*/, mxArray * /*val*/)
   {
-    err_invalid_type ();
+    err_invalid_type ("set_cell");
   }
 
   double get_scalar (void) const
   {
-    err_invalid_type ();
+    err_invalid_type ("get_scalar");
   }
 
   void * get_data (void) const
   {
-    err_invalid_type ();
+    err_invalid_type ("get_data");
+  }
+
+  mxDouble * get_doubles (void) const
+  {
+    err_invalid_type ("get_doubles");
+  }
+
+  mxSingle * get_singles (void) const
+  {
+    err_invalid_type ("get_singles");
+  }
+
+  mxInt8 * get_int8s (void) const
+  {
+    err_invalid_type ("get_int8s");
+  }
+
+  mxInt16 * get_int16s (void) const
+  {
+    err_invalid_type ("get_int16s");
+  }
+
+  mxInt32 * get_int32s (void) const
+  {
+    err_invalid_type ("get_int32s");
+  }
+
+  mxInt64 * get_int64s (void) const
+  {
+    err_invalid_type ("get_int64s");
+  }
+
+  mxUint8 * get_uint8s (void) const
+  {
+    err_invalid_type ("get_uint8s");
+  }
+
+  mxUint16 * get_uint16s (void) const
+  {
+    err_invalid_type ("get_uint16s");
+  }
+
+  mxUint32 * get_uint32s (void) const
+  {
+    err_invalid_type ("get_uint32s");
+  }
+
+  mxUint64 * get_uint64s (void) const
+  {
+    err_invalid_type ("get_uint64s");
   }
 
+  mxComplexDouble * get_complex_doubles (void) const
+  {
+    err_invalid_type ("get_complex_doubles");
+  }
+
+  mxComplexSingle * get_complex_singles (void) const
+  {
+    err_invalid_type ("get_complex_singles");
+  }
+
+#if 0
+  /* We don't have these yet. */
+  mxComplexInt8 * get_complex_int8s (void) const
+  {
+    err_invalid_type ("get_complex_int8s");
+  }
+
+  mxComplexInt16 * get_complex_int16s (void) const
+  {
+    err_invalid_type ("get_complex_int16s");
+  }
+
+  mxComplexInt32 * get_complex_int32s (void) const
+  {
+    err_invalid_type ("get_complex_int32s");
+  }
+
+  mxComplexInt64 * get_complex_int64s (void) const
+  {
+    err_invalid_type ("get_complex_int64s");
+  }
+
+  mxComplexUint8 * get_complex_uint8s (void) const
+  {
+    err_invalid_type ("get_complex_uint8s");
+  }
+
+  mxComplexUint16 * get_complex_uint16s (void) const
+  {
+    err_invalid_type ("get_complex_uint16s");
+  }
+
+  mxComplexUint32 * get_complex_uint32s (void) const
+  {
+    err_invalid_type ("get_complex_uint32s");
+  }
+
+  mxComplexUint64 * get_complex_uint64s (void) const
+  {
+    err_invalid_type ("get_complex_uint64s");
+  }
+#endif
+
   void * get_imag_data (void) const
   {
-    err_invalid_type ();
+    err_invalid_type ("get_imag_data");
   }
 
   void set_data (void * /*pr*/)
   {
-    err_invalid_type ();
+    err_invalid_type ("set_data");
+  }
+
+  int set_doubles (mxDouble *)
+  {
+    err_invalid_type ("set_doubles");
+  }
+
+  int set_singles (mxSingle *)
+  {
+    err_invalid_type ("set_singles");
+  }
+
+  int set_int8s (mxInt8 *)
+  {
+    err_invalid_type ("set_int8s");
+  }
+
+  int set_int16s (mxInt16 *)
+  {
+    err_invalid_type ("set_int16s");
+  }
+
+  int set_int32s (mxInt32 *)
+  {
+    err_invalid_type ("set_int32s");
+  }
+
+  int set_int64s (mxInt64 *)
+  {
+    err_invalid_type ("set_int64s");
+  }
+
+  int set_uint8s (mxUint8 *)
+  {
+    err_invalid_type ("set_uint8s");
+  }
+
+  int set_uint16s (mxUint16 *)
+  {
+    err_invalid_type ("set_uint16s");
+  }
+
+  int set_uint32s (mxUint32 *)
+  {
+    err_invalid_type ("set_uint32s");
+  }
+
+  int set_uint64s (mxUint64 *)
+  {
+    err_invalid_type ("set_uint64s");
   }
 
+  int set_complex_doubles (mxComplexDouble *)
+  {
+    err_invalid_type ("set_complex_doubles");
+  }
+
+  int set_complex_singles (mxComplexSingle *)
+  {
+    err_invalid_type ("set_complex_singles");
+  }
+
+#if 0
+  /* We don't have these yet. */
+  int set_complex_int8s (mxComplexInt8 *)
+  {
+    err_invalid_type ("set_complex_int8s");
+  }
+
+  int set_complex_int16s (mxComplexInt16 *)
+  {
+    err_invalid_type ("set_complex_int16s");
+  }
+
+  int set_complex_int32s (mxComplexInt32 *)
+  {
+    err_invalid_type ("set_complex_int32s");
+  }
+
+  int set_complex_int64s (mxComplexInt64 *)
+  {
+    err_invalid_type ("set_complex_int64s");
+  }
+
+  int set_complex_uint8s (mxComplexUint8 *)
+  {
+    err_invalid_type ("set_complex_uint8s");
+  }
+
+  int set_complex_uint16s (mxComplexUint16 *)
+  {
+    err_invalid_type ("set_complex_uint16s");
+  }
+
+  int set_complex_uint32s (mxComplexUint32 *)
+  {
+    err_invalid_type ("set_complex_uint32s");
+  }
+
+  int set_complex_uint64s (mxComplexUint64 *)
+  {
+    err_invalid_type ("set_complex_uint64s");
+  }
+#endif
+
   void set_imag_data (void * /*pi*/)
   {
-    err_invalid_type ();
+    err_invalid_type ("set_imag_data");
   }
 
   mwIndex * get_ir (void) const
   {
-    err_invalid_type ();
+    err_invalid_type ("get_ir");
   }
 
   mwIndex * get_jc (void) const
   {
-    err_invalid_type ();
+    err_invalid_type ("get_jc");
   }
 
   mwSize get_nzmax (void) const
   {
-    err_invalid_type ();
+    err_invalid_type ("get_nzmax");
   }
 
   void set_ir (mwIndex * /*ir*/)
   {
-    err_invalid_type ();
+    err_invalid_type ("set_ir");
   }
 
   void set_jc (mwIndex * /*jc*/)
   {
-    err_invalid_type ();
+    err_invalid_type ("set_jc");
   }
 
   void set_nzmax (mwSize /*nzmax*/)
   {
-    err_invalid_type ();
+    err_invalid_type ("set_nzmax");
   }
 
   int add_field (const char * /*key*/)
   {
-    err_invalid_type ();
+    err_invalid_type ("add_field");
   }
 
   void remove_field (int /*key_num*/)
   {
-    err_invalid_type ();
+    err_invalid_type ("remove_field");
   }
 
   mxArray * get_field_by_number (mwIndex /*index*/, int /*key_num*/) const
   {
-    err_invalid_type ();
+    err_invalid_type ("get_field_by_number");
   }
 
   void set_field_by_number (mwIndex /*index*/, int /*key_num*/,
                             mxArray * /*val*/)
   {
-    err_invalid_type ();
+    err_invalid_type ("set_field_by_number");
   }
 
   int get_number_of_fields (void) const
   {
-    err_invalid_type ();
+    err_invalid_type ("get_number_of_fields");
   }
 
   const char * get_field_name_by_number (int /*key_num*/) const
   {
-    err_invalid_type ();
+    err_invalid_type ("get_field_name_by_number");
   }
 
   int get_field_number (const char * /*key*/) const
@@ -1001,12 +1466,12 @@
 
   int get_string (char * /*buf*/, mwSize /*buflen*/) const
   {
-    err_invalid_type ();
+    err_invalid_type ("get_string");
   }
 
   char * array_to_string (void) const
   {
-    err_invalid_type ();
+    err_invalid_type ("array_to_string");
   }
 
   mwIndex calc_single_subscript (mwSize nsubs, mwIndex *subs) const
@@ -1022,16 +1487,16 @@
       case mxSTRUCT_CLASS: return sizeof (mxArray *);
       case mxLOGICAL_CLASS: return sizeof (mxLogical);
       case mxCHAR_CLASS: return sizeof (mxChar);
-      case mxDOUBLE_CLASS: return sizeof (double);
-      case mxSINGLE_CLASS: return sizeof (float);
-      case mxINT8_CLASS: return 1;
-      case mxUINT8_CLASS: return 1;
-      case mxINT16_CLASS: return 2;
-      case mxUINT16_CLASS: return 2;
-      case mxINT32_CLASS: return 4;
-      case mxUINT32_CLASS: return 4;
-      case mxINT64_CLASS: return 8;
-      case mxUINT64_CLASS: return 8;
+      case mxDOUBLE_CLASS: return get_numeric_element_size (sizeof (mxDouble));
+      case mxSINGLE_CLASS: return get_numeric_element_size (sizeof (mxSingle));
+      case mxINT8_CLASS: return get_numeric_element_size (sizeof (mxInt8));
+      case mxUINT8_CLASS: return get_numeric_element_size (sizeof (mxUint8));
+      case mxINT16_CLASS: return get_numeric_element_size (sizeof (mxInt16));
+      case mxUINT16_CLASS: return get_numeric_element_size (sizeof (mxUint16));
+      case mxINT32_CLASS: return get_numeric_element_size (sizeof (mxInt32));
+      case mxUINT32_CLASS: return get_numeric_element_size (sizeof (mxUint32));
+      case mxINT64_CLASS: return get_numeric_element_size (sizeof (mxInt64));
+      case mxUINT64_CLASS: return get_numeric_element_size (sizeof (mxUint64));
       case mxFUNCTION_CLASS: return 0;
       // FIXME: user-defined objects need their own class ID.
       //        What should they return, size of pointer?
@@ -1065,59 +1530,79 @@
 
   mwSize ndims;
   mwSize *dims;
-
-  OCTAVE_NORETURN void err_invalid_type (void) const
-  {
-    error ("invalid type for operation");
-  }
 };
 
+
 // Matlab-style numeric, character, and logical data.
 
+#define TYPED_GET_METHOD(TYPE, FCN_NAME)        \
+  TYPE FCN_NAME (void) const                    \
+  {                                             \
+    if (! m_interleaved)                        \
+      panic_impossible ();                      \
+                                                \
+    return static_cast<TYPE> (pr);              \
+  }
+
+#define TYPED_SET_METHOD(TYPE, FCN_NAME)        \
+  int FCN_NAME (TYPE d)                         \
+  {                                             \
+    if (! m_interleaved)                        \
+      panic_impossible ();                      \
+                                                \
+    pr = d;                                     \
+    return 0;                                   \
+  }
+
 class mxArray_number : public mxArray_matlab
 {
 public:
 
-  mxArray_number (mxClassID id_arg, mwSize ndims_arg, const mwSize *dims_arg,
-                  mxComplexity flag = mxREAL, bool init = true)
-    : mxArray_matlab (id_arg, ndims_arg, dims_arg),
-      pr (init ? mxArray::calloc (get_number_of_elements (),
-                                  get_element_size ())
-               : mxArray::malloc (get_number_of_elements ()
-                                  * get_element_size ())),
-      pi (flag == mxCOMPLEX
-            ? (init ? mxArray::calloc (get_number_of_elements (),
-                                       get_element_size ())
-                    : mxArray::malloc (get_number_of_elements ()
-                                       * get_element_size ()))
-            : nullptr) { }
-
-  mxArray_number (mxClassID id_arg, const dim_vector& dv,
+  mxArray_number (bool interleaved, mxClassID id_arg, mwSize ndims_arg,
+                  const mwSize *dims_arg, mxComplexity flag = mxREAL,
+                  bool init = true)
+    : mxArray_matlab (interleaved, id_arg, ndims_arg, dims_arg),
+      m_complex (flag == mxCOMPLEX),
+      pr (init
+          ? mxArray::calloc (get_number_of_elements (), get_element_size ())
+          : mxArray::malloc (get_number_of_elements () * get_element_size ())),
+      pi (m_interleaved
+          ? nullptr
+          : (m_complex
+             ? (init
+                ? mxArray::calloc (get_number_of_elements (), get_element_size ())
+                : mxArray::malloc (get_number_of_elements () * get_element_size ()))
+             : nullptr))
+  { }
+
+  mxArray_number (bool interleaved, mxClassID id_arg, const dim_vector& dv,
                   mxComplexity flag = mxREAL)
-    : mxArray_matlab (id_arg, dv),
+    : mxArray_matlab (interleaved, id_arg, dv), m_complex (flag == mxCOMPLEX),
       pr (mxArray::calloc (get_number_of_elements (), get_element_size ())),
-      pi (flag == mxCOMPLEX ? mxArray::calloc (get_number_of_elements (),
-                                               get_element_size ())
-                            : nullptr)
+      pi (m_interleaved
+          ? nullptr
+          : (m_complex
+             ? mxArray::calloc (get_number_of_elements (), get_element_size ())
+             : nullptr))
   { }
 
-  mxArray_number (mxClassID id_arg, mwSize m, mwSize n,
+  mxArray_number (bool interleaved, mxClassID id_arg, mwSize m, mwSize n,
                   mxComplexity flag = mxREAL, bool init = true)
-    : mxArray_matlab (id_arg, m, n),
-      pr (init ? mxArray::calloc (get_number_of_elements (),
-                                  get_element_size ())
-               : mxArray::malloc (get_number_of_elements ()
-                                  * get_element_size ())),
-      pi (flag == mxCOMPLEX
-            ? (init ? mxArray::calloc (get_number_of_elements (),
-                                       get_element_size ())
-                    : mxArray::malloc (get_number_of_elements ()
-                                       * get_element_size ()))
-            : nullptr)
+    : mxArray_matlab (interleaved, id_arg, m, n), m_complex (flag == mxCOMPLEX),
+      pr (init
+          ? mxArray::calloc (get_number_of_elements (), get_element_size ())
+          : mxArray::malloc (get_number_of_elements () * get_element_size ())),
+      pi (m_interleaved
+          ? nullptr
+          : (m_complex
+             ? (init
+                ? mxArray::calloc (get_number_of_elements (), get_element_size ())
+                : mxArray::malloc (get_number_of_elements () * get_element_size ()))
+             : nullptr))
   { }
 
-  mxArray_number (mxClassID id_arg, double val)
-    : mxArray_matlab (id_arg, 1, 1),
+  mxArray_number (bool interleaved, mxClassID id_arg, double val)
+    : mxArray_matlab (interleaved, id_arg, 1, 1),
       pr (mxArray::calloc (get_number_of_elements (), get_element_size ())),
       pi (nullptr)
   {
@@ -1125,8 +1610,8 @@
     dpr[0] = val;
   }
 
-  mxArray_number (mxClassID id_arg, mxLogical val)
-    : mxArray_matlab (id_arg, 1, 1),
+  mxArray_number (bool interleaved, mxClassID id_arg, mxLogical val)
+    : mxArray_matlab (interleaved, id_arg, 1, 1),
       pr (mxArray::calloc (get_number_of_elements (), get_element_size ())),
       pi (nullptr)
   {
@@ -1134,8 +1619,8 @@
     lpr[0] = val;
   }
 
-  mxArray_number (const char *str)
-    : mxArray_matlab (mxCHAR_CLASS,
+  mxArray_number (bool interleaved, const char *str)
+    : mxArray_matlab (interleaved, mxCHAR_CLASS,
                       str ? (strlen (str) ? 1 : 0) : 0,
                       str ? strlen (str) : 0),
       pr (mxArray::calloc (get_number_of_elements (), get_element_size ())),
@@ -1148,8 +1633,8 @@
   }
 
   // FIXME: ???
-  mxArray_number (mwSize m, const char **str)
-    : mxArray_matlab (mxCHAR_CLASS, m, max_str_len (m, str)),
+  mxArray_number (bool interleaved, mwSize m, const char **str)
+    : mxArray_matlab (interleaved, mxCHAR_CLASS, m, max_str_len (m, str)),
       pr (mxArray::calloc (get_number_of_elements (), get_element_size ())),
       pi (nullptr)
   {
@@ -1178,9 +1663,11 @@
   mxArray_number (const mxArray_number& val)
     : mxArray_matlab (val),
       pr (mxArray::malloc (get_number_of_elements () * get_element_size ())),
-      pi (val.pi ? mxArray::malloc (get_number_of_elements ()
-                                    * get_element_size ())
-                 : nullptr)
+      pi (m_interleaved
+          ? nullptr
+          : (val.pi
+             ? mxArray::malloc (get_number_of_elements () * get_element_size ())
+             : nullptr))
   {
     size_t nbytes = get_number_of_elements () * get_element_size ();
 
@@ -1198,7 +1685,10 @@
 
   mxArray_number& operator = (const mxArray_number&);
 
-  mxArray_base * dup (void) const { return new mxArray_number (*this); }
+  mxArray_base * dup (void) const
+  {
+    return new mxArray_number (*this);
+  }
 
   ~mxArray_number (void)
   {
@@ -1206,10 +1696,15 @@
     mxFree (pi);
   }
 
-  int is_complex (void) const { return pi != nullptr; }
+  int is_complex (void) const
+  {
+    return m_interleaved ? m_complex : (pi != nullptr);
+  }
 
   double get_scalar (void) const
   {
+    // FIXME: how does this work for interleaved complex arrays?
+
     double retval = 0;
 
     switch (get_class_id ())
@@ -1271,11 +1766,73 @@
 
   void * get_data (void) const { return pr; }
 
-  void * get_imag_data (void) const { return pi; }
+  void * get_imag_data (void) const
+  {
+    if (m_interleaved)
+      panic_impossible ();
+
+    return pi;
+  }
 
   void set_data (void *pr_arg) { pr = pr_arg; }
 
-  void set_imag_data (void *pi_arg) { pi = pi_arg; }
+  void set_imag_data (void *pi_arg)
+  {
+    if (m_interleaved)
+      panic_impossible ();
+
+    pi = pi_arg;
+  }
+
+  TYPED_GET_METHOD (mxDouble *, get_doubles)
+  TYPED_GET_METHOD (mxSingle *, get_singles)
+  TYPED_GET_METHOD (mxInt8 *, get_int8s)
+  TYPED_GET_METHOD (mxInt16 *, get_int16s)
+  TYPED_GET_METHOD (mxInt32 *, get_int32s)
+  TYPED_GET_METHOD (mxInt64 *, get_int64s)
+  TYPED_GET_METHOD (mxUint8 *, get_uint8s)
+  TYPED_GET_METHOD (mxUint16 *, get_uint16s)
+  TYPED_GET_METHOD (mxUint32 *, get_uint32s)
+  TYPED_GET_METHOD (mxUint64 *, get_uint64s)
+
+  TYPED_GET_METHOD (mxComplexDouble *, get_complex_doubles)
+  TYPED_GET_METHOD (mxComplexSingle *, get_complex_singles)
+#if 0
+  /* We don't have these yet. */
+  TYPED_GET_METHOD (mxComplexInt8 *, get_complex_int8s)
+  TYPED_GET_METHOD (mxComplexInt16 *, get_complex_int16s)
+  TYPED_GET_METHOD (mxComplexInt32 *, get_complex_int32s)
+  TYPED_GET_METHOD (mxComplexInt64 *, get_complex_int64s)
+  TYPED_GET_METHOD (mxComplexUint8 *, get_complex_uint8s)
+  TYPED_GET_METHOD (mxComplexUint16 *, get_complex_uint16s)
+  TYPED_GET_METHOD (mxComplexUint32 *, get_complex_uint32s)
+  TYPED_GET_METHOD (mxComplexUint64 *, get_complex_uint64s)
+#endif
+
+  TYPED_SET_METHOD (mxDouble *, set_doubles)
+  TYPED_SET_METHOD (mxSingle *, set_singles)
+  TYPED_SET_METHOD (mxInt8 *, set_int8s)
+  TYPED_SET_METHOD (mxInt16 *, set_int16s)
+  TYPED_SET_METHOD (mxInt32 *, set_int32s)
+  TYPED_SET_METHOD (mxInt64 *, set_int64s)
+  TYPED_SET_METHOD (mxUint8 *, set_uint8s)
+  TYPED_SET_METHOD (mxUint16 *, set_uint16s)
+  TYPED_SET_METHOD (mxUint32 *, set_uint32s)
+  TYPED_SET_METHOD (mxUint64 *, set_uint64s)
+
+  TYPED_SET_METHOD (mxComplexDouble *, set_complex_doubles)
+  TYPED_SET_METHOD (mxComplexSingle *, set_complex_singles)
+#if 0
+  /* We don't have these yet. */
+  TYPED_SET_METHOD (mxComplexInt8 *, set_complex_int8s)
+  TYPED_SET_METHOD (mxComplexInt16 *, set_complex_int16s)
+  TYPED_SET_METHOD (mxComplexInt32 *, set_complex_int32s)
+  TYPED_SET_METHOD (mxComplexInt64 *, set_complex_int64s)
+  TYPED_SET_METHOD (mxComplexUint8 *, set_complex_uint8s)
+  TYPED_SET_METHOD (mxComplexUint16 *, set_complex_uint16s)
+  TYPED_SET_METHOD (mxComplexUint32 *, set_complex_uint32s)
+  TYPED_SET_METHOD (mxComplexUint64 *, set_complex_uint64s)
+#endif
 
   int get_string (char *buf, mwSize buflen) const
   {
@@ -1336,23 +1893,40 @@
         {
           mwSize nel = get_number_of_elements ();
 
-          double *ppr = static_cast<double *> (pr);
-
-          if (pi)
+          if (is_complex ())
             {
-              ComplexNDArray val (dv);
-
-              Complex *ptr = val.fortran_vec ();
-
-              double *ppi = static_cast<double *> (pi);
-
-              for (mwIndex i = 0; i < nel; i++)
-                ptr[i] = Complex (ppr[i], ppi[i]);
-
-              retval = val;
+              if (m_interleaved)
+                {
+                  Complex *ppr = static_cast<Complex *> (pr);
+
+                  ComplexNDArray val (dv);
+                  Complex *ptr = val.fortran_vec ();
+
+                  for (mwIndex i = 0; i < nel; i++)
+                    ptr[i] = ppr[i];
+
+                  retval = val;
+                }
+              else
+                {
+                  double *ppr = static_cast<double *> (pr);
+
+                  ComplexNDArray val (dv);
+
+                  Complex *ptr = val.fortran_vec ();
+
+                  double *ppi = static_cast<double *> (pi);
+
+                  for (mwIndex i = 0; i < nel; i++)
+                    ptr[i] = Complex (ppr[i], ppi[i]);
+
+                  retval = val;
+                }
             }
           else
             {
+              double *ppr = static_cast<double *> (pr);
+
               NDArray val (dv);
 
               double *ptr = val.fortran_vec ();
@@ -1369,23 +1943,40 @@
         {
           mwSize nel = get_number_of_elements ();
 
-          float *ppr = static_cast<float *> (pr);
-
-          if (pi)
+          if (is_complex ())
             {
-              FloatComplexNDArray val (dv);
-
-              FloatComplex *ptr = val.fortran_vec ();
-
-              float *ppi = static_cast<float *> (pi);
-
-              for (mwIndex i = 0; i < nel; i++)
-                ptr[i] = FloatComplex (ppr[i], ppi[i]);
-
-              retval = val;
+              if (m_interleaved)
+                {
+                  FloatComplex *ppr = static_cast<FloatComplex *> (pr);
+
+                  FloatComplexNDArray val (dv);
+                  FloatComplex *ptr = val.fortran_vec ();
+
+                  for (mwIndex i = 0; i < nel; i++)
+                    ptr[i] = ppr[i];
+
+                  retval = val;
+                }
+              else
+                {
+                  float *ppr = static_cast<float *> (pr);
+
+                  FloatComplexNDArray val (dv);
+
+                  FloatComplex *ptr = val.fortran_vec ();
+
+                  float *ppi = static_cast<float *> (pi);
+
+                  for (mwIndex i = 0; i < nel; i++)
+                    ptr[i] = FloatComplex (ppr[i], ppi[i]);
+
+                  retval = val;
+                }
             }
           else
             {
+              float *ppr = static_cast<float *> (pr);
+
               FloatNDArray val (dv);
 
               float *ptr = val.fortran_vec ();
@@ -1464,7 +2055,7 @@
   octave_value
   int_to_ov (const dim_vector& dv) const
   {
-    if (pi)
+    if (is_complex ())
       error ("complex integer types are not supported");
 
     mwSize nel = get_number_of_elements ();
@@ -1483,7 +2074,17 @@
 
 private:
 
+  // Flag to identify complex object if using interleaved data and PI is
+  // always nullptr.
+  bool m_complex;
+
+  // If using interleaved complex storage, this is the pointer to data
+  // (real, complex, or logical).  Otherwise, it is the pointer to the
+  // real part of the data.
   void *pr;
+
+  // If using non-interleaved complex storage, this is the pointer to
+  // the imaginary part of the data.  Othrwise is is always nullptr.
   void *pi;
 };
 
@@ -1493,24 +2094,31 @@
 {
 public:
 
-  mxArray_sparse (mxClassID id_arg, mwSize m, mwSize n, mwSize nzmax_arg,
-                  mxComplexity flag = mxREAL)
-    : mxArray_matlab (id_arg, m, n)
-  {
-    nzmax = (nzmax_arg > 0 ? nzmax_arg : 1);
-    pr = mxArray::calloc (nzmax, get_element_size ());
-    pi = (flag == mxCOMPLEX ? mxArray::calloc (nzmax, get_element_size ())
-                            : nullptr);
-    ir = (static_cast<mwIndex *> (mxArray::calloc (nzmax, sizeof (mwIndex))));
-    jc = (static_cast<mwIndex *> (mxArray::calloc (n + 1, sizeof (mwIndex))));
-  }
+  mxArray_sparse (bool interleaved, mxClassID id_arg, mwSize m, mwSize n,
+                  mwSize nzmax_arg, mxComplexity flag = mxREAL)
+    : mxArray_matlab (interleaved, id_arg, m, n), m_complex (flag == mxCOMPLEX),
+
+      nzmax (nzmax_arg > 0 ? nzmax_arg : 1),
+      pr (mxArray::calloc (nzmax, get_element_size ())),
+      pi (m_interleaved
+          ? nullptr
+          : (m_complex
+             ? mxArray::calloc (nzmax, get_element_size ())
+             : nullptr)),
+      ir (static_cast<mwIndex *> (mxArray::calloc (nzmax, sizeof (mwIndex)))),
+      jc (static_cast<mwIndex *> (mxArray::calloc (n + 1, sizeof (mwIndex))))
+  { }
 
 private:
 
   mxArray_sparse (const mxArray_sparse& val)
     : mxArray_matlab (val), nzmax (val.nzmax),
       pr (mxArray::malloc (nzmax * get_element_size ())),
-      pi (val.pi ? mxArray::malloc (nzmax * get_element_size ()) : nullptr),
+      pi (m_interleaved
+          ? nullptr
+          : (val.pi
+             ? mxArray::malloc (nzmax * get_element_size ())
+             : nullptr)),
       ir (static_cast<mwIndex *> (mxArray::malloc (nzmax * sizeof (mwIndex)))),
       jc (static_cast<mwIndex *> (mxArray::malloc (nzmax * sizeof (mwIndex))))
   {
@@ -1536,7 +2144,10 @@
 
   mxArray_sparse& operator = (const mxArray_sparse&);
 
-  mxArray_base * dup (void) const { return new mxArray_sparse (*this); }
+  mxArray_base * dup (void) const
+  {
+    return new mxArray_sparse (*this);
+  }
 
   ~mxArray_sparse (void)
   {
@@ -1546,17 +2157,38 @@
     mxFree (jc);
   }
 
-  int is_complex (void) const { return pi != nullptr; }
+  int is_complex (void) const
+  {
+    return m_interleaved ? m_complex : (pi != nullptr);
+  }
 
   int is_sparse (void) const { return 1; }
 
   void * get_data (void) const { return pr; }
 
-  void * get_imag_data (void) const { return pi; }
+  void * get_imag_data (void) const
+  {
+    if (m_interleaved)
+      panic_impossible ();
+
+    return pi;
+  }
 
   void set_data (void *pr_arg) { pr = pr_arg; }
 
-  void set_imag_data (void *pi_arg) { pi = pi_arg; }
+  void set_imag_data (void *pi_arg)
+  {
+    if (m_interleaved)
+      panic_impossible ();
+
+    pi = pi_arg;
+  }
+
+  TYPED_GET_METHOD (mxDouble *, get_doubles)
+  TYPED_GET_METHOD (mxComplexDouble *, get_complex_doubles)
+
+  TYPED_SET_METHOD (mxDouble *, set_doubles)
+  TYPED_SET_METHOD (mxComplexDouble *, set_complex_doubles)
 
   mwIndex * get_ir (void) const { return ir; }
 
@@ -1584,24 +2216,45 @@
       {
       case mxDOUBLE_CLASS:
         {
-          if (pi)
+          if (is_complex ())
             {
-              double *ppr = static_cast<double *> (pr);
-              double *ppi = static_cast<double *> (pi);
-
-              SparseComplexMatrix val (get_m (), get_n (),
-                                       static_cast<octave_idx_type> (nzmax));
-
-              for (mwIndex i = 0; i < nzmax; i++)
+              if (m_interleaved)
                 {
-                  val.xdata (i) = Complex (ppr[i], ppi[i]);
-                  val.xridx (i) = ir[i];
+                  Complex *ppr = static_cast<Complex *> (pr);
+
+                  SparseComplexMatrix val (get_m (), get_n (),
+                                           static_cast<octave_idx_type> (nzmax));
+
+                  for (mwIndex i = 0; i < nzmax; i++)
+                    {
+                      val.xdata (i) = ppr[i];
+                      val.xridx (i) = ir[i];
+                    }
+
+                  for (mwIndex i = 0; i < get_n () + 1; i++)
+                    val.xcidx (i) = jc[i];
+
+                  retval = val;
                 }
-
-              for (mwIndex i = 0; i < get_n () + 1; i++)
-                val.xcidx (i) = jc[i];
-
-              retval = val;
+              else
+                {
+                  double *ppr = static_cast<double *> (pr);
+                  double *ppi = static_cast<double *> (pi);
+
+                  SparseComplexMatrix val (get_m (), get_n (),
+                                           static_cast<octave_idx_type> (nzmax));
+
+                  for (mwIndex i = 0; i < nzmax; i++)
+                    {
+                      val.xdata (i) = Complex (ppr[i], ppi[i]);
+                      val.xridx (i) = ir[i];
+                    }
+
+                  for (mwIndex i = 0; i < get_n () + 1; i++)
+                    val.xcidx (i) = jc[i];
+
+                  retval = val;
+                }
             }
           else
             {
@@ -1657,10 +2310,23 @@
 
 private:
 
+  // Flag to identify complex object if using interleaved data and PI is
+  // always nullptr.
+  bool m_complex;
+
+  // Maximun number of nonzero elements.
   mwSize nzmax;
 
+  // If using interleaved complex storage, this is the pointer to data
+  // (real, complex, or logical).  Otherwise, it is the pointer to the
+  // real part of the data.
   void *pr;
+
+  // If using non-interleaved complex storage, this is the pointer to
+  // the imaginary part of the data.  Othrwise is is always nullptr.
   void *pi;
+
+  // Sparse storage indexing arrays.
   mwIndex *ir;
   mwIndex *jc;
 };
@@ -1671,9 +2337,9 @@
 {
 public:
 
-  mxArray_struct (mwSize ndims_arg, const mwSize *dims_arg, int num_keys_arg,
-                  const char **keys)
-    : mxArray_matlab (mxSTRUCT_CLASS, ndims_arg, dims_arg),
+  mxArray_struct (bool interleaved, mwSize ndims_arg, const mwSize *dims_arg,
+                  int num_keys_arg, const char **keys)
+    : mxArray_matlab (interleaved, mxSTRUCT_CLASS, ndims_arg, dims_arg),
       nfields (num_keys_arg),
       fields (static_cast<char **> (mxArray::calloc (nfields,
                                                      sizeof (char *)))),
@@ -1684,8 +2350,9 @@
     init (keys);
   }
 
-  mxArray_struct (const dim_vector& dv, int num_keys_arg, const char **keys)
-    : mxArray_matlab (mxSTRUCT_CLASS, dv), nfields (num_keys_arg),
+  mxArray_struct (bool interleaved, const dim_vector& dv, int num_keys_arg,
+                  const char **keys)
+    : mxArray_matlab (interleaved, mxSTRUCT_CLASS, dv), nfields (num_keys_arg),
       fields (static_cast<char **> (mxArray::calloc (nfields,
                                                      sizeof (char *)))),
       data (static_cast<mxArray **> (mxArray::calloc (nfields *
@@ -1695,8 +2362,10 @@
     init (keys);
   }
 
-  mxArray_struct (mwSize m, mwSize n, int num_keys_arg, const char **keys)
-    : mxArray_matlab (mxSTRUCT_CLASS, m, n), nfields (num_keys_arg),
+  mxArray_struct (bool interleaved, mwSize m, mwSize n, int num_keys_arg,
+                  const char **keys)
+    : mxArray_matlab (interleaved, mxSTRUCT_CLASS, m, n),
+      nfields (num_keys_arg),
       fields (static_cast<char **> (mxArray::calloc (nfields,
                                                      sizeof (char *)))),
       data (static_cast<mxArray **> (mxArray::calloc (nfields *
@@ -1937,18 +2606,18 @@
 {
 public:
 
-  mxArray_cell (mwSize ndims_arg, const mwSize *dims_arg)
-    : mxArray_matlab (mxCELL_CLASS, ndims_arg, dims_arg),
+  mxArray_cell (bool interleaved, mwSize ndims_arg, const mwSize *dims_arg)
+    : mxArray_matlab (interleaved, mxCELL_CLASS, ndims_arg, dims_arg),
       data (static_cast<mxArray **> (mxArray::calloc (get_number_of_elements (),
                                      sizeof (mxArray *)))) { }
 
-  mxArray_cell (const dim_vector& dv)
-    : mxArray_matlab (mxCELL_CLASS, dv),
+  mxArray_cell (bool interleaved, const dim_vector& dv)
+    : mxArray_matlab (interleaved, mxCELL_CLASS, dv),
       data (static_cast<mxArray **> (mxArray::calloc (get_number_of_elements (),
                                      sizeof (mxArray *)))) { }
 
-  mxArray_cell (mwSize m, mwSize n)
-    : mxArray_matlab (mxCELL_CLASS, m, n),
+  mxArray_cell (bool interleaved, mwSize m, mwSize n)
+    : mxArray_matlab (interleaved, mxCELL_CLASS, m, n),
       data (static_cast<mxArray **> (mxArray::calloc (get_number_of_elements (),
                                      sizeof (mxArray *)))) { }
 
@@ -2021,54 +2690,76 @@
 
 // ------------------------------------------------------------------
 
-mxArray::mxArray (const octave_value& ov)
-  : rep (new mxArray_octave_value (ov)), name (nullptr) { }
-
-mxArray::mxArray (mxClassID id, mwSize ndims, const mwSize *dims,
-                  mxComplexity flag, bool init)
-  : rep (new mxArray_number (id, ndims, dims, flag, init)), name (nullptr) { }
-
-mxArray::mxArray (mxClassID id, const dim_vector& dv, mxComplexity flag)
-  : rep (new mxArray_number (id, dv, flag)), name (nullptr) { }
-
-mxArray::mxArray (mxClassID id, mwSize m, mwSize n,
+mxArray::mxArray (bool interleaved, const octave_value& ov)
+  : rep (create_rep (interleaved, ov)), name (nullptr)
+{ }
+
+mxArray::mxArray (bool interleaved, mxClassID id, mwSize ndims,
+                  const mwSize *dims, mxComplexity flag, bool init)
+  : rep (create_rep (interleaved, id, ndims, dims, flag, init)),
+    name (nullptr)
+{ }
+
+mxArray::mxArray (bool interleaved, mxClassID id, const dim_vector& dv,
+                  mxComplexity flag)
+  : rep (create_rep (interleaved, id, dv, flag)), name (nullptr)
+{ }
+
+mxArray::mxArray (bool interleaved, mxClassID id, mwSize m, mwSize n,
                   mxComplexity flag, bool init)
-  : rep (new mxArray_number (id, m, n, flag, init)), name (nullptr) { }
-
-mxArray::mxArray (mxClassID id, double val)
-  : rep (new mxArray_number (id, val)), name (nullptr) { }
-
-mxArray::mxArray (mxClassID id, mxLogical val)
-  : rep (new mxArray_number (id, val)), name (nullptr) { }
-
-mxArray::mxArray (const char *str)
-  : rep (new mxArray_number (str)), name (nullptr) { }
-
-mxArray::mxArray (mwSize m, const char **str)
-  : rep (new mxArray_number (m, str)), name (nullptr) { }
-
-mxArray::mxArray (mxClassID id, mwSize m, mwSize n, mwSize nzmax,
-                  mxComplexity flag)
-  : rep (new mxArray_sparse (id, m, n, nzmax, flag)), name (nullptr) { }
-
-mxArray::mxArray (mwSize ndims, const mwSize *dims, int num_keys,
+  : rep (create_rep (interleaved, id, m, n, flag, init)), name (nullptr)
+{ }
+
+mxArray::mxArray (bool interleaved, mxClassID id, double val)
+  : rep (create_rep (interleaved, id, val)), name (nullptr)
+{ }
+
+mxArray::mxArray (bool interleaved, mxClassID id, mxLogical val)
+  : rep (create_rep (interleaved, id, val)), name (nullptr)
+{ }
+
+mxArray::mxArray (bool interleaved, const char *str)
+  : rep (create_rep (interleaved, str)), name (nullptr)
+{ }
+
+mxArray::mxArray (bool interleaved, mwSize m, const char **str)
+  : rep (create_rep (interleaved, m, str)), name (nullptr)
+{ }
+
+mxArray::mxArray (bool interleaved, mxClassID id, mwSize m, mwSize n,
+                  mwSize nzmax, mxComplexity flag)
+  : rep (create_rep (interleaved, id, m, n, nzmax, flag)), name (nullptr)
+{ }
+
+mxArray::mxArray (bool interleaved, mwSize ndims, const mwSize *dims,
+                  int num_keys,
                   const char **keys)
-  : rep (new mxArray_struct (ndims, dims, num_keys, keys)), name (nullptr) { }
-
-mxArray::mxArray (const dim_vector& dv, int num_keys, const char **keys)
-  : rep (new mxArray_struct (dv, num_keys, keys)), name (nullptr) { }
-
-mxArray::mxArray (mwSize m, mwSize n, int num_keys, const char **keys)
-  : rep (new mxArray_struct (m, n, num_keys, keys)), name (nullptr) { }
-
-mxArray::mxArray (mwSize ndims, const mwSize *dims)
-  : rep (new mxArray_cell (ndims, dims)), name (nullptr) { }
-
-mxArray::mxArray (const dim_vector& dv)
-  : rep (new mxArray_cell (dv)), name (nullptr) { }
-
-mxArray::mxArray (mwSize m, mwSize n)
-  : rep (new mxArray_cell (m, n)), name (nullptr) { }
+  : rep (new mxArray_struct (interleaved, ndims, dims, num_keys, keys)),
+    name (nullptr)
+{ }
+
+mxArray::mxArray (bool interleaved, const dim_vector& dv, int num_keys,
+                  const char **keys)
+  : rep (new mxArray_struct (interleaved, dv, num_keys, keys)), name (nullptr)
+{ }
+
+mxArray::mxArray (bool interleaved, mwSize m, mwSize n, int num_keys,
+                  const char **keys)
+  : rep (new mxArray_struct (interleaved, m, n, num_keys, keys)),
+    name (nullptr)
+{ }
+
+mxArray::mxArray (bool interleaved, mwSize ndims, const mwSize *dims)
+  : rep (new mxArray_cell (interleaved, ndims, dims)), name (nullptr)
+{ }
+
+mxArray::mxArray (bool interleaved, const dim_vector& dv)
+  : rep (new mxArray_cell (interleaved, dv)), name (nullptr)
+{ }
+
+mxArray::mxArray (bool interleaved, mwSize m, mwSize n)
+  : rep (new mxArray_cell (interleaved, m, n)), name (nullptr)
+{ }
 
 mxArray::~mxArray (void)
 {
@@ -2100,6 +2791,64 @@
   return rep->as_octave_value ();
 }
 
+mxArray_base *
+mxArray::create_rep (bool interleaved, const octave_value& ov)
+{
+  return new mxArray_octave_value (interleaved, ov);
+}
+
+mxArray_base *
+mxArray::create_rep (bool interleaved, mxClassID id, mwSize ndims,
+                     const mwSize *dims, mxComplexity flag, bool init)
+{
+  return new mxArray_number (interleaved, id, ndims, dims, flag, init);
+}
+
+mxArray_base *
+mxArray::create_rep (bool interleaved, mxClassID id, const dim_vector& dv,
+                     mxComplexity flag)
+{
+  return new mxArray_number (interleaved, id, dv, flag);
+}
+
+mxArray_base *
+mxArray::create_rep (bool interleaved, mxClassID id, mwSize m, mwSize n,
+                     mxComplexity flag, bool init)
+{
+  return new mxArray_number (interleaved, id, m, n, flag, init);
+}
+
+mxArray_base *
+mxArray::create_rep (bool interleaved, mxClassID id, double val)
+{
+  return new mxArray_number (interleaved, id, val);
+}
+
+mxArray_base *
+mxArray::create_rep (bool interleaved, mxClassID id, mxLogical val)
+{
+  return new mxArray_number (interleaved, id, val);
+}
+
+mxArray_base *
+mxArray::create_rep (bool interleaved, const char *str)
+{
+  return new mxArray_number (interleaved, str);
+}
+
+mxArray_base *
+mxArray::create_rep (bool interleaved, mwSize m, const char **str)
+{
+  return new mxArray_number (interleaved, m, str);
+}
+
+mxArray_base *
+mxArray::create_rep (bool interleaved, mxClassID id, mwSize m, mwSize n,
+                     mwSize nzmax, mxComplexity flag)
+{
+  return new mxArray_sparse (interleaved, id, m, n, nzmax, flag);
+}
+
 void
 mxArray::maybe_mutate (void) const
 {
@@ -2130,7 +2879,7 @@
 {
 public:
 
-  mex (octave_mex_function *f)
+  mex (octave_mex_function& f)
     : curr_mex_fcn (f), memlist (), arraylist (), fname (nullptr) { }
 
   // No copying!
@@ -2363,7 +3112,9 @@
   // freed on exit unless marked as persistent.
   mxArray * make_value (const octave_value& ov)
   {
-    return mark_array (new mxArray (ov));
+    bool interleaved = curr_mex_fcn.use_interleaved_complex ();
+
+    return mark_array (new mxArray (interleaved, ov));
   }
 
   // Free an array and its contents.
@@ -2387,7 +3138,7 @@
     return inlist;
   }
 
-  octave_mex_function * current_mex_function (void) const
+  octave_mex_function& current_mex_function (void) const
   {
     return curr_mex_fcn;
   }
@@ -2398,7 +3149,7 @@
 private:
 
   // Pointer to the mex function that corresponds to this mex context.
-  octave_mex_function *curr_mex_fcn;
+  octave_mex_function& curr_mex_fcn;
 
   // List of memory resources that need to be freed upon exit.
   std::set<void *> memlist;
@@ -2438,7 +3189,6 @@
     else
       warning ("%s: value not marked", function_name ());
 #endif
-
   }
 };
 
@@ -2478,8 +3228,9 @@
   return ptr;
 }
 
-static inline void *
-maybe_unmark (void *ptr)
+template <typename T>
+static inline T *
+maybe_unmark (T *ptr)
 {
   if (mex_context)
     mex_context->unmark (ptr);
@@ -2580,116 +3331,235 @@
 
 // Constructors.
 mxArray *
+mxCreateCellArray_interleaved (mwSize ndims, const mwSize *dims)
+{
+  return maybe_mark_array (new mxArray (true, ndims, dims));
+}
+
+mxArray *
 mxCreateCellArray (mwSize ndims, const mwSize *dims)
 {
-  return maybe_mark_array (new mxArray (ndims, dims));
+  return maybe_mark_array (new mxArray (false, ndims, dims));
+}
+
+mxArray *
+mxCreateCellMatrix_interleaved (mwSize m, mwSize n)
+{
+  return maybe_mark_array (new mxArray (true, m, n));
 }
 
 mxArray *
 mxCreateCellMatrix (mwSize m, mwSize n)
 {
-  return maybe_mark_array (new mxArray (m, n));
+  return maybe_mark_array (new mxArray (false, m, n));
+}
+
+mxArray *
+mxCreateCharArray_interleaved (mwSize ndims, const mwSize *dims)
+{
+  return maybe_mark_array (new mxArray (true, mxCHAR_CLASS, ndims, dims));
 }
 
 mxArray *
 mxCreateCharArray (mwSize ndims, const mwSize *dims)
 {
-  return maybe_mark_array (new mxArray (mxCHAR_CLASS, ndims, dims));
+  return maybe_mark_array (new mxArray (false, mxCHAR_CLASS, ndims, dims));
+}
+
+mxArray *
+mxCreateCharMatrixFromStrings_interleaved (mwSize m, const char **str)
+{
+  return maybe_mark_array (new mxArray (true, m, str));
 }
 
 mxArray *
 mxCreateCharMatrixFromStrings (mwSize m, const char **str)
 {
-  return maybe_mark_array (new mxArray (m, str));
+  return maybe_mark_array (new mxArray (false, m, str));
+}
+
+mxArray *
+mxCreateDoubleMatrix_interleaved (mwSize m, mwSize n, mxComplexity flag)
+{
+  return maybe_mark_array (new mxArray (true, mxDOUBLE_CLASS, m, n, flag));
 }
 
 mxArray *
 mxCreateDoubleMatrix (mwSize m, mwSize n, mxComplexity flag)
 {
-  return maybe_mark_array (new mxArray (mxDOUBLE_CLASS, m, n, flag));
+  return maybe_mark_array (new mxArray (false, mxDOUBLE_CLASS, m, n, flag));
+}
+
+mxArray *
+mxCreateDoubleScalar_interleaved (double val)
+{
+  return maybe_mark_array (new mxArray (true, mxDOUBLE_CLASS, val));
 }
 
 mxArray *
 mxCreateDoubleScalar (double val)
 {
-  return maybe_mark_array (new mxArray (mxDOUBLE_CLASS, val));
+  return maybe_mark_array (new mxArray (false, mxDOUBLE_CLASS, val));
+}
+
+mxArray *
+mxCreateLogicalArray_interleaved (mwSize ndims, const mwSize *dims)
+{
+  return maybe_mark_array (new mxArray (true, mxLOGICAL_CLASS, ndims, dims));
 }
 
 mxArray *
 mxCreateLogicalArray (mwSize ndims, const mwSize *dims)
 {
-  return maybe_mark_array (new mxArray (mxLOGICAL_CLASS, ndims, dims));
+  return maybe_mark_array (new mxArray (false, mxLOGICAL_CLASS, ndims, dims));
+}
+
+mxArray *
+mxCreateLogicalMatrix_interleaved (mwSize m, mwSize n)
+{
+  return maybe_mark_array (new mxArray (true, mxLOGICAL_CLASS, m, n));
 }
 
 mxArray *
 mxCreateLogicalMatrix (mwSize m, mwSize n)
 {
-  return maybe_mark_array (new mxArray (mxLOGICAL_CLASS, m, n));
+  return maybe_mark_array (new mxArray (false, mxLOGICAL_CLASS, m, n));
+}
+
+mxArray *
+mxCreateLogicalScalar_interleaved (mxLogical val)
+{
+  return maybe_mark_array (new mxArray (true, mxLOGICAL_CLASS, val));
 }
 
 mxArray *
 mxCreateLogicalScalar (mxLogical val)
 {
-  return maybe_mark_array (new mxArray (mxLOGICAL_CLASS, val));
+  return maybe_mark_array (new mxArray (false, mxLOGICAL_CLASS, val));
+}
+
+mxArray *
+mxCreateNumericArray_interleaved (mwSize ndims, const mwSize *dims,
+                                  mxClassID class_id, mxComplexity flag)
+{
+  return maybe_mark_array (new mxArray (true, class_id, ndims, dims, flag));
 }
 
 mxArray *
-mxCreateNumericArray (mwSize ndims, const mwSize *dims, mxClassID class_id,
-                      mxComplexity flag)
-{
-  return maybe_mark_array (new mxArray (class_id, ndims, dims, flag));
+mxCreateNumericArray (mwSize ndims, const mwSize *dims,
+                               mxClassID class_id, mxComplexity flag)
+{
+  return maybe_mark_array (new mxArray (false, class_id, ndims, dims, flag));
+}
+
+mxArray *
+mxCreateNumericMatrix_interleaved (mwSize m, mwSize n, mxClassID class_id,
+                                   mxComplexity flag)
+{
+  return maybe_mark_array (new mxArray (true, class_id, m, n, flag));
 }
 
 mxArray *
 mxCreateNumericMatrix (mwSize m, mwSize n, mxClassID class_id,
-                       mxComplexity flag)
-{
-  return maybe_mark_array (new mxArray (class_id, m, n, flag));
+                                mxComplexity flag)
+{
+  return maybe_mark_array (new mxArray (false, class_id, m, n, flag));
+}
+
+mxArray *
+mxCreateUninitNumericArray_interleaved (mwSize ndims, const mwSize *dims,
+                                        mxClassID class_id, mxComplexity flag)
+{
+  return maybe_mark_array (new mxArray (true, class_id, ndims, dims, flag,
+                                        false));
 }
 
 mxArray *
 mxCreateUninitNumericArray (mwSize ndims, const mwSize *dims,
-                            mxClassID class_id, mxComplexity flag)
-{
-  return maybe_mark_array (new mxArray (class_id, ndims, dims, flag, false));
+                                     mxClassID class_id, mxComplexity flag)
+{
+  return maybe_mark_array (new mxArray (false, class_id, ndims, dims, flag,
+                                        false));
+}
+
+mxArray *
+mxCreateUninitNumericMatrix_interleaved (mwSize m, mwSize n,
+                                         mxClassID class_id, mxComplexity flag)
+{
+  return maybe_mark_array (new mxArray (true, class_id, m, n, flag, false));
 }
 
 mxArray *
 mxCreateUninitNumericMatrix (mwSize m, mwSize n, mxClassID class_id,
-                             mxComplexity flag)
-{
-  return maybe_mark_array (new mxArray (class_id, m, n, flag, false));
+                                      mxComplexity flag)
+{
+  return maybe_mark_array (new mxArray (false, class_id, m, n, flag, false));
+}
+
+mxArray *
+mxCreateSparse_interleaved (mwSize m, mwSize n, mwSize nzmax, mxComplexity flag)
+{
+  return maybe_mark_array (new mxArray (true, mxDOUBLE_CLASS, m, n, nzmax,
+                                        flag));
 }
 
 mxArray *
 mxCreateSparse (mwSize m, mwSize n, mwSize nzmax, mxComplexity flag)
 {
-  return maybe_mark_array (new mxArray (mxDOUBLE_CLASS, m, n, nzmax, flag));
+  return maybe_mark_array (new mxArray (false, mxDOUBLE_CLASS, m, n, nzmax,
+                                        flag));
+}
+
+mxArray *
+mxCreateSparseLogicalMatrix_interleaved (mwSize m, mwSize n, mwSize nzmax)
+{
+  return maybe_mark_array (new mxArray (true, mxLOGICAL_CLASS, m, n, nzmax));
 }
 
 mxArray *
 mxCreateSparseLogicalMatrix (mwSize m, mwSize n, mwSize nzmax)
 {
-  return maybe_mark_array (new mxArray (mxLOGICAL_CLASS, m, n, nzmax));
+  return maybe_mark_array (new mxArray (false, mxLOGICAL_CLASS, m, n, nzmax));
+}
+
+mxArray *
+mxCreateString_interleaved (const char *str)
+{
+  return maybe_mark_array (new mxArray (true, str));
 }
 
 mxArray *
 mxCreateString (const char *str)
 {
-  return maybe_mark_array (new mxArray (str));
+  return maybe_mark_array (new mxArray (false, str));
+}
+
+mxArray *
+mxCreateStructArray_interleaved (mwSize ndims, const mwSize *dims,
+                                 int num_keys, const char **keys)
+{
+  return maybe_mark_array (new mxArray (true, ndims, dims, num_keys, keys));
 }
 
 mxArray *
 mxCreateStructArray (mwSize ndims, const mwSize *dims, int num_keys,
-                     const char **keys)
-{
-  return maybe_mark_array (new mxArray (ndims, dims, num_keys, keys));
+                              const char **keys)
+{
+  return maybe_mark_array (new mxArray (false, ndims, dims, num_keys, keys));
 }
 
 mxArray *
-mxCreateStructMatrix (mwSize m, mwSize n, int num_keys, const char **keys)
-{
-  return maybe_mark_array (new mxArray (m, n, num_keys, keys));
+mxCreateStructMatrix_interleaved (mwSize m, mwSize n, int num_keys,
+                                  const char **keys)
+{
+  return maybe_mark_array (new mxArray (true, m, n, num_keys, keys));
+}
+
+mxArray *
+mxCreateStructMatrix (mwSize m, mwSize n, int num_keys,
+                               const char **keys)
+{
+  return maybe_mark_array (new mxArray (false, m, n, num_keys, keys));
 }
 
 // Copy constructor.
@@ -2918,12 +3788,6 @@
   return static_cast<double *> (ptr->get_data ());
 }
 
-double *
-mxGetPi (const mxArray *ptr)
-{
-  return static_cast<double *> (ptr->get_imag_data ());
-}
-
 double
 mxGetScalar (const mxArray *ptr)
 {
@@ -2951,12 +3815,121 @@
   return ptr->get_data ();
 }
 
+double *
+mxGetPi (const mxArray *ptr)
+{
+  return static_cast<double *> (ptr->get_imag_data ());
+}
+
 void *
 mxGetImagData (const mxArray *ptr)
 {
   return ptr->get_imag_data ();
 }
 
+mxDouble * mxGetDoubles (const mxArray *ptr)
+{
+  return ptr->get_doubles ();
+}
+
+mxSingle * mxGetSingles (const mxArray *ptr)
+{
+  return ptr->get_singles ();
+}
+
+mxInt8 * mxGetInt8s (const mxArray *ptr)
+{
+  return ptr->get_int8s ();
+}
+
+mxInt16 * mxGetInt16s (const mxArray *ptr)
+{
+  return ptr->get_int16s ();
+}
+
+mxInt32 * mxGetInt32s (const mxArray *ptr)
+{
+  return ptr->get_int32s ();
+}
+
+mxInt64 * mxGetInt64s (const mxArray *ptr)
+{
+  return ptr->get_int64s ();
+}
+
+mxUint8 * mxGetUint8s (const mxArray *ptr)
+{
+  return ptr->get_uint8s ();
+}
+
+mxUint16 * mxGetUint16s (const mxArray *ptr)
+{
+  return ptr->get_uint16s ();
+}
+
+mxUint32 * mxGetUint32s (const mxArray *ptr)
+{
+  return ptr->get_uint32s ();
+}
+
+mxUint64 * mxGetUint64s (const mxArray *ptr)
+{
+  return ptr->get_uint64s ();
+}
+
+mxComplexDouble * mxGetComplexDoubles (const mxArray *ptr)
+{
+  return ptr->get_complex_doubles ();
+}
+
+mxComplexSingle * mxGetComplexSingles (const mxArray *ptr)
+{
+  return ptr->get_complex_singles ();
+}
+
+#if 0
+/* We don't have these yet. */
+mxComplexInt8 * mxGetComplexInt8s (const mxArray *ptr)
+{
+  return ptr->get_complex_int8s ();
+}
+
+mxComplexInt16 * mxGetComplexInt16s (const mxArray *ptr)
+{
+  return ptr->get_complex_int16s ();
+}
+
+mxComplexInt32 * mxGetComplexInt32s (const mxArray *ptr)
+{
+  return ptr->get_complex_int32s ();
+}
+
+mxComplexInt64 * mxGetComplexInt64s (const mxArray *ptr)
+{
+  return ptr->get_complex_int64s ();
+}
+
+mxComplexUint8 * mxGetComplexUint8s (const mxArray *ptr)
+{
+  return ptr->get_complex_uint8s ();
+}
+
+mxComplexUint16 * mxGetComplexUint16s (const mxArray *ptr)
+{
+  return ptr->get_complex_uint16s ();
+}
+
+mxComplexUint32 * mxGetComplexUint32s (const mxArray *ptr)
+{
+  return ptr->get_complex_uint32s ();
+}
+
+mxComplexUint64 * mxGetComplexUint64s (const mxArray *ptr)
+{
+  return ptr->get_complex_uint64s ();
+}
+#endif
+
 // Data setters.
 void
 mxSetPr (mxArray *ptr, double *pr)
@@ -2965,18 +3938,121 @@
 }
 
 void
+mxSetData (mxArray *ptr, void *pr)
+{
+  ptr->set_data (maybe_unmark (pr));
+}
+
+int mxSetDoubles (mxArray *ptr, mxDouble *data)
+{
+  return ptr->set_doubles (maybe_unmark (data));
+}
+
+int mxSetSingles (mxArray *ptr, mxSingle *data)
+{
+  return ptr->set_singles (maybe_unmark (data));
+}
+
+int mxSetInt8s (mxArray *ptr, mxInt8 *data)
+{
+  return ptr->set_int8s (maybe_unmark (data));
+}
+
+int mxSetInt16s (mxArray *ptr, mxInt16 *data)
+{
+  return ptr->set_int16s (maybe_unmark (data));
+}
+
+int mxSetInt32s (mxArray *ptr, mxInt32 *data)
+{
+  return ptr->set_int32s (maybe_unmark (data));
+}
+
+int mxSetInt64s (mxArray *ptr, mxInt64 *data)
+{
+  return ptr->set_int64s (maybe_unmark (data));
+}
+
+int mxSetUint8s (mxArray *ptr, mxUint8 *data)
+{
+  return ptr->set_uint8s (maybe_unmark (data));
+}
+
+int mxSetUint16s (mxArray *ptr, mxUint16 *data)
+{
+  return ptr->set_uint16s (maybe_unmark (data));
+}
+
+int mxSetUint32s (mxArray *ptr, mxUint32 *data)
+{
+  return ptr->set_uint32s (maybe_unmark (data));
+}
+
+int mxSetUint64s (mxArray *ptr, mxUint64 *data)
+{
+  return ptr->set_uint64s (maybe_unmark (data));
+}
+
+int mxSetComplexDoubles (mxArray *ptr, mxComplexDouble *data)
+{
+  return ptr->set_complex_doubles (maybe_unmark (data));
+}
+
+int mxSetComplexSingles (mxArray *ptr, mxComplexSingle *data)
+{
+  return ptr->set_complex_singles (maybe_unmark (data));
+}
+
+#if 0
+/* We don't have these yet. */
+int mxSetComplexInt8s (mxArray *ptr, mxComplexInt8 *data)
+{
+  return ptr->set_complex_int8s (maybe_unmark (data));
+}
+
+int mxSetComplexInt16s (mxArray *ptr, mxComplexInt16 *data)
+{
+  return ptr->set_complex_int16s (maybe_unmark (data));
+}
+
+int mxSetComplexInt32s (mxArray *ptr, mxComplexInt32 *data)
+{
+  return ptr->set_complex_int32s (maybe_unmark (data));
+}
+
+int mxSetComplexInt64s (mxArray *ptr, mxComplexInt64 *data)
+{
+  return ptr->set_complex_int64s (maybe_unmark (data));
+}
+
+int mxSetComplexUint8s (mxArray *ptr, mxComplexUint8 *data)
+{
+  return ptr->set_complex_uint8s (maybe_unmark (data));
+}
+
+int mxSetComplexUint16s (mxArray *ptr, mxComplexUint16 *data)
+{
+  return ptr->set_complex_uint16s (maybe_unmark (data));
+}
+
+int mxSetComplexUint32s (mxArray *ptr, mxComplexUint32 *data)
+{
+  return ptr->set_complex_uint32s (maybe_unmark (data));
+}
+
+int mxSetComplexUint64s (mxArray *ptr, mxComplexUint64 *data)
+{
+  return ptr->set_complex_uint64s (maybe_unmark (data));
+}
+#endif
+
+void
 mxSetPi (mxArray *ptr, double *pi)
 {
   ptr->set_imag_data (maybe_unmark (pi));
 }
 
 void
-mxSetData (mxArray *ptr, void *pr)
-{
-  ptr->set_data (maybe_unmark (pr));
-}
-
-void
 mxSetImagData (mxArray *ptr, void *pi)
 {
   ptr->set_imag_data (maybe_unmark (pi));
@@ -3177,7 +4253,7 @@
   // Save old mex pointer.
   frame.protect_var (mex_context);
 
-  mex context (&mex_fcn);
+  mex context (mex_fcn);
 
   for (int i = 0; i < nargin; i++)
     argin[i] = context.make_value (args(i));
@@ -3619,17 +4695,28 @@
 {
   if (mex_context)
     {
-      octave_mex_function *curr_mex_fcn = mex_context->current_mex_function ();
-
-      assert (curr_mex_fcn);
-
-      curr_mex_fcn->atexit (f);
+      octave_mex_function& curr_mex_fcn = mex_context->current_mex_function ();
+
+      curr_mex_fcn.atexit (f);
     }
 
   return 0;
 }
 
 const mxArray *
+mexGet_interleaved (double handle, const char *property)
+{
+  mxArray *m = nullptr;
+
+  octave_value ret = get_property_from_handle (handle, property, "mexGet");
+
+  if (ret.is_defined ())
+    m = ret.as_mxArray (true);
+
+  return m;
+}
+
+const mxArray *
 mexGet (double handle, const char *property)
 {
   mxArray *m = nullptr;
@@ -3637,7 +4724,7 @@
   octave_value ret = get_property_from_handle (handle, property, "mexGet");
 
   if (ret.is_defined ())
-    m = ret.as_mxArray ();
+    m = ret.as_mxArray (false);
 
   return m;
 }
--- a/libinterp/corefcn/mexproto.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/corefcn/mexproto.h	Tue Feb 18 13:16:41 2020 -0500
@@ -61,10 +61,19 @@
 #  include <stdbool.h>
 #endif
 
+#if ! defined (MX_HAS_INTERLEAVED_COMPLEX)
+#  define MX_HAS_INTERLEAVED_COMPLEX 0
+#endif
+
 #define MXARRAY_TYPEDEFS_ONLY
 #include "mxarray.h"
 #undef MXARRAY_TYPEDEFS_ONLY
 
+/* Prototype for the gateway function.  */
+
+extern void mexFunction (int nlhs, mxArray *plhs[],
+                         int nrhs, const mxArray *prhs[]);
+
 /* Interface to the interpreter.  */
 extern OCTINTERP_API const char * mexFunctionName (void);
 
@@ -98,8 +107,12 @@
 extern OCTINTERP_API int mexPutVariable (const char *space, const char *name,
                                          const mxArray *ptr);
 
+#if MX_HAS_INTERLEAVED_COMPLEX
+#  define mexGet mexGet_interleaved
+#endif
 extern OCTINTERP_API const mxArray * mexGet (double handle,
                                              const char *property);
+
 extern OCTINTERP_API int mexSet (double handle, const char *property,
                                  mxArray *val);
 
@@ -131,6 +144,27 @@
 extern OCTINTERP_API void mxFree (void *ptr);
 
 /* Constructors.  */
+#if MX_HAS_INTERLEAVED_COMPLEX
+#  define mxCreateCellArray mxCreateCellArray_interleaved
+#  define mxCreateCellMatrix mxCreateCellMatrix_interleaved
+#  define mxCreateCharArray mxCreateCharArray_interleaved
+#  define mxCreateCharMatrixFromStrings mxCreateCharMatrixFromStrings_interleaved
+#  define mxCreateDoubleMatrix mxCreateDoubleMatrix_interleaved
+#  define mxCreateDoubleScalar mxCreateDoubleScalar_interleaved
+#  define mxCreateLogicalArray mxCreateLogicalArray_interleaved
+#  define mxCreateLogicalMatrix mxCreateLogicalMatrix_interleaved
+#  define mxCreateLogicalScalar mxCreateLogicalScalar_interleaved
+#  define mxCreateNumericArray mxCreateNumericArray_interleaved
+#  define mxCreateNumericMatrix mxCreateNumericMatrix_interleaved
+#  define mxCreateUninitNumericArray mxCreateUninitNumericArray_interleaved
+#  define mxCreateUninitNumericMatrix mxCreateUninitNumericMatrix_interleaved
+#  define mxCreateSparse mxCreateSparse_interleaved
+#  define mxCreateSparseLogicalMatrix mxCreateSparseLogicalMatrix_interleaved
+#  define mxCreateString mxCreateString_interleaved
+#  define mxCreateStructArray mxCreateStructArray_interleaved
+#  define mxCreateStructMatrix mxCreateStructMatrix_interleaved
+#endif
+
 extern OCTINTERP_API mxArray * mxCreateCellArray (mwSize ndims,
                                                   const mwSize *dims);
 extern OCTINTERP_API mxArray * mxCreateCellMatrix (mwSize m, mwSize n);
@@ -227,20 +261,79 @@
 extern OCTINTERP_API int mxSetDimensions (mxArray *ptr, const mwSize *dims,
                                           mwSize ndims);
 
+#if MX_HAS_INTERLEAVED_COMPLEX
+extern OCTINTERP_API int mxMakeArrayReal (mxArray *ptr);
+extern OCTINTERP_API int mxMakeArrayComplex (mxArray *ptr);
+#endif
+
 /* Data extractors.  */
-extern OCTINTERP_API double * mxGetPi (const mxArray *ptr);
 extern OCTINTERP_API double * mxGetPr (const mxArray *ptr);
 extern OCTINTERP_API double mxGetScalar (const mxArray *ptr);
 extern OCTINTERP_API mxChar * mxGetChars (const mxArray *ptr);
 extern OCTINTERP_API mxLogical * mxGetLogicals (const mxArray *ptr);
 extern OCTINTERP_API void * mxGetData (const mxArray *ptr);
+#if MX_HAS_INTERLEAVED_COMPLEX
+extern OCTINTERP_API mxDouble * mxGetDoubles (const mxArray *p);
+extern OCTINTERP_API mxSingle * mxGetSingles (const mxArray *p);
+extern OCTINTERP_API mxInt8 * mxGetInt8s (const mxArray *p);
+extern OCTINTERP_API mxInt16 * mxGetInt16s (const mxArray *p);
+extern OCTINTERP_API mxInt32 * mxGetInt32s (const mxArray *p);
+extern OCTINTERP_API mxInt64 * mxGetInt64s (const mxArray *p);
+extern OCTINTERP_API mxUint8 * mxGetUint8s (const mxArray *p);
+extern OCTINTERP_API mxUint16 * mxGetUint16s (const mxArray *p);
+extern OCTINTERP_API mxUint32 * mxGetUint32s (const mxArray *p);
+extern OCTINTERP_API mxUint64 * mxGetUint64s (const mxArray *p);
+
+extern OCTINTERP_API mxComplexDouble * mxGetComplexDoubles (const mxArray *p);
+extern OCTINTERP_API mxComplexSingle * mxGetComplexSingles (const mxArray *p);
+#if 0
+/* We don't have these yet. */
+extern OCTINTERP_API mxComplexInt8 * mxGetComplexInt8s (const mxArray *p);
+extern OCTINTERP_API mxComplexInt16 * mxGetComplexInt16s (const mxArray *p);
+extern OCTINTERP_API mxComplexInt32 * mxGetComplexInt32s (const mxArray *p);
+extern OCTINTERP_API mxComplexInt64 * mxGetComplexInt64s (const mxArray *p);
+extern OCTINTERP_API mxComplexUint8 * mxGetComplexUint8s (const mxArray *p);
+extern OCTINTERP_API mxComplexUint16 * mxGetComplexUint16s (const mxArray *p);
+extern OCTINTERP_API mxComplexUint32 * mxGetComplexUint32s (const mxArray *p);
+extern OCTINTERP_API mxComplexUint64 * mxGetComplexUint64s (const mxArray *p);
+#endif
+#else
+extern OCTINTERP_API double * mxGetPi (const mxArray *ptr);
 extern OCTINTERP_API void * mxGetImagData (const mxArray *ptr);
+#endif
 
 /* Data setters.  */
 extern OCTINTERP_API void mxSetPr (mxArray *ptr, double *pr);
+extern OCTINTERP_API void mxSetData (mxArray *ptr, void *data);
+#if MX_HAS_INTERLEAVED_COMPLEX
+extern OCTINTERP_API int mxSetDoubles (mxArray *p, mxDouble *d);
+extern OCTINTERP_API int mxSetSingles (mxArray *p, mxSingle *d);
+extern OCTINTERP_API int mxSetInt8s (mxArray *p, mxInt8 *d);
+extern OCTINTERP_API int mxSetInt16s (mxArray *p, mxInt16 *d);
+extern OCTINTERP_API int mxSetInt32s (mxArray *p, mxInt32 *d);
+extern OCTINTERP_API int mxSetInt64s (mxArray *p, mxInt64 *d);
+extern OCTINTERP_API int mxSetUint8s (mxArray *p, mxUint8 *d);
+extern OCTINTERP_API int mxSetUint16s (mxArray *p, mxUint16 *d);
+extern OCTINTERP_API int mxSetUint32s (mxArray *p, mxUint32 *d);
+extern OCTINTERP_API int mxSetUint64s (mxArray *p, mxUint64 *d);
+
+extern OCTINTERP_API int mxSetComplexDoubles (mxArray *p, mxComplexDouble *d);
+extern OCTINTERP_API int mxSetComplexSingles (mxArray *p, mxComplexSingle *d);
+#if 0
+/* We don't have these yet. */
+extern OCTINTERP_API int mxSetComplexInt8s (mxArray *p, mxComplexInt8 *d);
+extern OCTINTERP_API int mxSetComplexInt16s (mxArray *p, mxComplexInt16 *d);
+extern OCTINTERP_API int mxSetComplexInt32s (mxArray *p, mxComplexInt32 *d);
+extern OCTINTERP_API int mxSetComplexInt64s (mxArray *p, mxComplexInt64 *d);
+extern OCTINTERP_API int mxSetComplexUint8s (mxArray *p, mxComplexUint8 *d);
+extern OCTINTERP_API int mxSetComplexUint16s (mxArray *p, mxComplexUint16 *d);
+extern OCTINTERP_API int mxSetComplexUint32s (mxArray *p, mxComplexUint32 *d);
+extern OCTINTERP_API int mxSetComplexUint64s (mxArray *p, mxComplexUint64 *d);
+#endif
+#else
 extern OCTINTERP_API void mxSetPi (mxArray *ptr, double *pi);
-extern OCTINTERP_API void mxSetData (mxArray *ptr, void *data);
 extern OCTINTERP_API void mxSetImagData (mxArray *ptr, void *pi);
+#endif
 
 /* Classes.  */
 extern OCTINTERP_API mxClassID mxGetClassID (const mxArray *ptr);
--- a/libinterp/corefcn/mxarray.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/corefcn/mxarray.h	Tue Feb 18 13:16:41 2020 -0500
@@ -90,7 +90,7 @@
 {
 protected:
 
-  mxArray_base (void) { }
+  mxArray_base (bool interleaved);
 
 public:
 
@@ -197,12 +197,12 @@
   virtual void set_property (mwIndex /*idx*/, const char * /*pname*/,
                              const mxArray * /*pval*/)
   {
-    err_invalid_type ();
+    err_invalid_type ("set_property");
   }
 
   virtual mxArray * get_cell (mwIndex /*idx*/) const
   {
-    err_invalid_type ();
+    err_invalid_type ("get_cell");
   }
 
   virtual void set_cell (mwIndex idx, mxArray *val) = 0;
@@ -211,10 +211,60 @@
 
   virtual void * get_data (void) const = 0;
 
+  virtual mxDouble * get_doubles (void) const = 0;
+  virtual mxSingle * get_singles (void) const = 0;
+  virtual mxInt8 * get_int8s (void) const = 0;
+  virtual mxInt16 * get_int16s (void) const = 0;
+  virtual mxInt32 * get_int32s (void) const = 0;
+  virtual mxInt64 * get_int64s (void) const = 0;
+  virtual mxUint8 * get_uint8s (void) const = 0;
+  virtual mxUint16 * get_uint16s (void) const = 0;
+  virtual mxUint32 * get_uint32s (void) const = 0;
+  virtual mxUint64 * get_uint64s (void) const = 0;
+
+  virtual mxComplexDouble * get_complex_doubles (void) const = 0;
+  virtual mxComplexSingle * get_complex_singles (void) const = 0;
+#if 0
+  /* We don't have these yet. */
+  virtual mxComplexInt8 * get_complex_int8s (void) const = 0;
+  virtual mxComplexInt16 * get_complex_int16s (void) const = 0;
+  virtual mxComplexInt32 * get_complex_int32s (void) const = 0;
+  virtual mxComplexInt64 * get_complex_int64s (void) const = 0;
+  virtual mxComplexUint8 * get_complex_uint8s (void) const = 0;
+  virtual mxComplexUint16 * get_complex_uint16s (void) const = 0;
+  virtual mxComplexUint32 * get_complex_uint32s (void) const = 0;
+  virtual mxComplexUint64 * get_complex_uint64s (void) const = 0;
+#endif
+
   virtual void * get_imag_data (void) const = 0;
 
   virtual void set_data (void *pr) = 0;
 
+  virtual int set_doubles (mxDouble *data) = 0;
+  virtual int set_singles (mxSingle *data) = 0;
+  virtual int set_int8s (mxInt8 *data) = 0;
+  virtual int set_int16s (mxInt16 *data) = 0;
+  virtual int set_int32s (mxInt32 *data) = 0;
+  virtual int set_int64s (mxInt64 *data) = 0;
+  virtual int set_uint8s (mxUint8 *data) = 0;
+  virtual int set_uint16s (mxUint16 *data) = 0;
+  virtual int set_uint32s (mxUint32 *data) = 0;
+  virtual int set_uint64s (mxUint64 *data) = 0;
+
+  virtual int set_complex_doubles (mxComplexDouble *data) = 0;
+  virtual int set_complex_singles (mxComplexSingle *data) = 0;
+#if 0
+  /* We don't have these yet. */
+  virtual int set_complex_int8s (mxComplexInt8 *data) = 0;
+  virtual int set_complex_int16s (mxComplexInt16 *data) = 0;
+  virtual int set_complex_int32s (mxComplexInt32 *data) = 0;
+  virtual int set_complex_int64s (mxComplexInt64 *data) = 0;
+  virtual int set_complex_uint8s (mxComplexUint8 *data) = 0;
+  virtual int set_complex_uint16s (mxComplexUint16 *data) = 0;
+  virtual int set_complex_uint32s (mxComplexUint32 *data) = 0;
+  virtual int set_complex_uint64s (mxComplexUint64 *data) = 0;
+#endif
+
   virtual void set_imag_data (void *pi) = 0;
 
   virtual mwIndex * get_ir (void) const = 0;
@@ -260,11 +310,21 @@
 
 protected:
 
-  mxArray_base (const mxArray_base&) { }
+  // If TRUE, we are using interleaved storage for complex numeric arrays.
+  bool m_interleaved;
+
+  mxArray_base (const mxArray_base&) = default;
 
-  OCTAVE_NORETURN void err_invalid_type (void) const
+  size_t get_numeric_element_size (size_t size) const
   {
-    error ("invalid type for operation");
+    return (m_interleaved
+            ? is_complex () ? 2 * size : size
+            : size);
+  }
+
+  OCTAVE_NORETURN void err_invalid_type (const char *op) const
+  {
+    error ("%s: invalid type for mxArray::%s", get_class_name (), op);
   }
 };
 
@@ -276,38 +336,42 @@
 {
 public:
 
-  mxArray (const octave_value& ov);
+  mxArray (bool interleaved, const octave_value& ov);
 
-  mxArray (mxClassID id, mwSize ndims, const mwSize *dims,
+  mxArray (bool interleaved, mxClassID id, mwSize ndims, const mwSize *dims,
            mxComplexity flag = mxREAL, bool init = true);
 
-  mxArray (mxClassID id, const dim_vector& dv, mxComplexity flag = mxREAL);
+  mxArray (bool interleaved, mxClassID id, const dim_vector& dv,
+           mxComplexity flag = mxREAL);
 
-  mxArray (mxClassID id, mwSize m, mwSize n,
+  mxArray (bool interleaved, mxClassID id, mwSize m, mwSize n,
            mxComplexity flag = mxREAL, bool init = true);
 
-  mxArray (mxClassID id, double val);
+  mxArray (bool interleaved, mxClassID id, double val);
 
-  mxArray (mxClassID id, mxLogical val);
+  mxArray (bool interleaved, mxClassID id, mxLogical val);
 
-  mxArray (const char *str);
+  mxArray (bool interleaved, const char *str);
 
-  mxArray (mwSize m, const char **str);
+  mxArray (bool interleaved, mwSize m, const char **str);
 
-  mxArray (mxClassID id, mwSize m, mwSize n, mwSize nzmax,
+  mxArray (bool interleaved, mxClassID id, mwSize m, mwSize n, mwSize nzmax,
            mxComplexity flag = mxREAL);
 
-  mxArray (mwSize ndims, const mwSize *dims, int num_keys, const char **keys);
+  mxArray (bool interleaved, mwSize ndims, const mwSize *dims, int num_keys,
+           const char **keys);
 
-  mxArray (const dim_vector& dv, int num_keys, const char **keys);
-
-  mxArray (mwSize m, mwSize n, int num_keys, const char **keys);
+  mxArray (bool interleaved, const dim_vector& dv, int num_keys,
+           const char **keys);
 
-  mxArray (mwSize ndims, const mwSize *dims);
+  mxArray (bool interleaved, mwSize m, mwSize n, int num_keys,
+           const char **keys);
 
-  mxArray (const dim_vector& dv);
+  mxArray (bool interleaved, mwSize ndims, const mwSize *dims);
 
-  mxArray (mwSize m, mwSize n);
+  mxArray (bool interleaved, const dim_vector& dv);
+
+  mxArray (bool interleaved, mwSize m, mwSize n);
 
   mxArray * dup (void) const
   {
@@ -428,11 +492,137 @@
 
   void * get_data (void) const { DO_MUTABLE_METHOD (void *, get_data ()); }
 
+  mxDouble * get_doubles (void) const
+  { DO_MUTABLE_METHOD (mxDouble *, get_doubles ()); }
+
+  mxSingle * get_singles (void) const
+  { DO_MUTABLE_METHOD (mxSingle *, get_singles ()); }
+
+  mxInt8 * get_int8s (void) const
+  { DO_MUTABLE_METHOD (mxInt8 *, get_int8s ()); }
+
+  mxInt16 * get_int16s (void) const
+  { DO_MUTABLE_METHOD (mxInt16 *, get_int16s ()); }
+
+  mxInt32 * get_int32s (void) const
+  { DO_MUTABLE_METHOD (mxInt32 *, get_int32s ()); }
+
+  mxInt64 * get_int64s (void) const
+  { DO_MUTABLE_METHOD (mxInt64 *, get_int64s ()); }
+
+  mxUint8 * get_uint8s (void) const
+  { DO_MUTABLE_METHOD (mxUint8 *, get_uint8s ()); }
+
+  mxUint16 * get_uint16s (void) const
+  { DO_MUTABLE_METHOD (mxUint16 *, get_uint16s ()); }
+
+  mxUint32 * get_uint32s (void) const
+  { DO_MUTABLE_METHOD (mxUint32 *, get_uint32s ()); }
+
+  mxUint64 * get_uint64s (void) const
+  { DO_MUTABLE_METHOD (mxUint64 *, get_uint64s ()); }
+
+  mxComplexDouble * get_complex_doubles (void) const
+  { DO_MUTABLE_METHOD (mxComplexDouble *, get_complex_doubles ()); }
+
+  mxComplexSingle * get_complex_singles (void) const
+  { DO_MUTABLE_METHOD (mxComplexSingle *, get_complex_singles ()); }
+
+#if 0
+  /* We don't have these yet. */
+  mxComplexInt8 * get_complex_int8s (void) const
+  { DO_MUTABLE_METHOD (mxComplexInt8 *, get_complex_int8s ()); }
+
+  mxComplexInt16 * get_complex_int16s (void) const
+  { DO_MUTABLE_METHOD (mxComplexInt16 *, get_complex_int16s ()); }
+
+  mxComplexInt32 * get_complex_int32s (void) const
+  { DO_MUTABLE_METHOD (mxComplexInt32 *, get_complex_int32s ()); }
+
+  mxComplexInt64 * get_complex_int64s (void) const
+  { DO_MUTABLE_METHOD (mxComplexInt64 *, get_complex_int64s ()); }
+
+  mxComplexUint8 * get_complex_uint8s (void) const
+  { DO_MUTABLE_METHOD (mxComplexUint8 *, get_complex_uint8s ()); }
+
+  mxComplexUint16 * get_complex_uint16s (void) const
+  { DO_MUTABLE_METHOD (mxComplexUint16 *, get_complex_uint16s ()); }
+
+  mxComplexUint32 * get_complex_uint32s (void) const
+  { DO_MUTABLE_METHOD (mxComplexUint32 *, get_complex_uint32s ()); }
+
+  mxComplexUint64 * get_complex_uint64s (void) const
+  { DO_MUTABLE_METHOD (mxComplexUint64 *, get_complex_uint64s ()); }
+#endif
+
   void * get_imag_data (void) const
   { DO_MUTABLE_METHOD (void *, get_imag_data ()); }
 
   void set_data (void *pr) { DO_VOID_MUTABLE_METHOD (set_data (pr)); }
 
+  int set_doubles (mxDouble *data)
+  { DO_MUTABLE_METHOD (int, set_doubles (data)); }
+
+  int set_singles (mxSingle *data)
+  { DO_MUTABLE_METHOD (int, set_singles (data)); }
+
+  int set_int8s (mxInt8 *data)
+  { DO_MUTABLE_METHOD (int, set_int8s (data)); }
+
+  int set_int16s (mxInt16 *data)
+  { DO_MUTABLE_METHOD (int, set_int16s (data)); }
+
+  int set_int32s (mxInt32 *data)
+  { DO_MUTABLE_METHOD (int, set_int32s (data)); }
+
+  int set_int64s (mxInt64 *data)
+  { DO_MUTABLE_METHOD (int, set_int64s (data)); }
+
+  int set_uint8s (mxUint8 *data)
+  { DO_MUTABLE_METHOD (int, set_uint8s (data)); }
+
+  int set_uint16s (mxUint16 *data)
+  { DO_MUTABLE_METHOD (int, set_uint16s (data)); }
+
+  int set_uint32s (mxUint32 *data)
+  { DO_MUTABLE_METHOD (int, set_uint32s (data)); }
+
+  int set_uint64s (mxUint64 *data)
+  { DO_MUTABLE_METHOD (int, set_uint64s (data)); }
+
+  int set_complex_doubles (mxComplexDouble *data)
+  { DO_MUTABLE_METHOD (int, set_complex_doubles (data)); }
+
+  int set_complex_singles (mxComplexSingle *data)
+  { DO_MUTABLE_METHOD (int, set_complex_singles (data)); }
+
+#if 0
+  /* We don't have these yet. */
+  int set_complex_int8s (mxComplexInt8 *data)
+  { DO_MUTABLE_METHOD (int, set_complex_int8s (data)); }
+
+  int set_complex_int16s (mxComplexInt16 *data)
+  { DO_MUTABLE_METHOD (int, set_complex_int16s (data)); }
+
+  int set_complex_int32s (mxComplexInt32 *data)
+  { DO_MUTABLE_METHOD (int, set_complex_int32s (data)); }
+
+  int set_complex_int64s (mxComplexInt64 *data)
+  { DO_MUTABLE_METHOD (int, set_complex_int64s (data)); }
+
+  int set_complex_uint8s (mxComplexUint8 *data)
+  { DO_MUTABLE_METHOD (int, set_complex_uint8s (data)); }
+
+  int set_complex_uint16s (mxComplexUint16 *data)
+  { DO_MUTABLE_METHOD (int, set_complex_uint16s (data)); }
+
+  int set_complex_uint32s (mxComplexUint32 *data)
+  { DO_MUTABLE_METHOD (int, set_complex_uint32s (data)); }
+
+  int set_complex_uint64s (mxComplexUint64 *data)
+  { DO_MUTABLE_METHOD (int, set_complex_uint64s (data)); }
+#endif
+
   void set_imag_data (void *pi) { DO_VOID_MUTABLE_METHOD (set_imag_data (pi)); }
 
   mwIndex * get_ir (void) const { DO_MUTABLE_METHOD (mwIndex *, get_ir ()); }
@@ -515,6 +705,37 @@
   mxArray (mxArray_base *r, const char *n)
     : rep (r), name (mxArray::strsave (n)) { }
 
+  static mxArray_base *
+  create_rep (bool interleaved, const octave_value& ov);
+
+  static mxArray_base *
+  create_rep (bool interleaved, mxClassID id, mwSize ndims,
+              const mwSize *dims, mxComplexity flag, bool init);
+
+  static mxArray_base *
+  create_rep (bool interleaved, mxClassID id, const dim_vector& dv,
+              mxComplexity flag);
+
+  static mxArray_base *
+  create_rep (bool interleaved, mxClassID id, mwSize m, mwSize n,
+              mxComplexity flag, bool init);
+
+  static mxArray_base *
+  create_rep (bool interleaved, mxClassID id, double val);
+
+  static mxArray_base *
+  create_rep (bool interleaved, mxClassID id, mxLogical val);
+
+  static mxArray_base *
+  create_rep (bool interleaved, const char *str);
+
+  static mxArray_base *
+  create_rep (bool interleaved, mwSize m, const char **str);
+
+  static mxArray_base *
+  create_rep (bool interleaved, mxClassID id, mwSize m, mwSize n,
+              mwSize nzmax, mxComplexity flag);
+
   void maybe_mutate (void) const;
 };
 
--- a/libinterp/octave-value/ov-base-diag.cc	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-base-diag.cc	Tue Feb 18 13:16:41 2020 -0500
@@ -543,9 +543,9 @@
 
 template <typename DMT, typename MT>
 mxArray *
-octave_base_diag<DMT, MT>::as_mxArray (void) const
+octave_base_diag<DMT, MT>::as_mxArray (bool interleaved) const
 {
-  return to_dense ().as_mxArray ();
+  return to_dense ().as_mxArray (interleaved);
 }
 
 template <typename DMT, typename MT>
--- a/libinterp/octave-value/ov-base-diag.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-base-diag.h	Tue Feb 18 13:16:41 2020 -0500
@@ -224,7 +224,7 @@
              oct_data_conv::data_type output_type, int skip,
              octave::mach_info::float_format flt_fmt) const;
 
-  mxArray * as_mxArray (void) const;
+  mxArray * as_mxArray (bool interleaved) const;
 
   bool print_as_scalar (void) const;
 
--- a/libinterp/octave-value/ov-base.cc	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-base.cc	Tue Feb 18 13:16:41 2020 -0500
@@ -974,7 +974,7 @@
 }
 
 mxArray *
-octave_base_value::as_mxArray (void) const
+octave_base_value::as_mxArray (bool) const
 {
   return nullptr;
 }
--- a/libinterp/octave-value/ov-base.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-base.h	Tue Feb 18 13:16:41 2020 -0500
@@ -697,7 +697,7 @@
 
   virtual octave_idx_type * mex_get_jc (void) const { return nullptr; }
 
-  virtual mxArray * as_mxArray (void) const;
+  virtual mxArray * as_mxArray (bool interleaved) const;
 
   virtual octave_value diag (octave_idx_type k = 0) const;
 
--- a/libinterp/octave-value/ov-bool-mat.cc	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-bool-mat.cc	Tue Feb 18 13:16:41 2020 -0500
@@ -566,18 +566,18 @@
 }
 
 mxArray *
-octave_bool_matrix::as_mxArray (void) const
+octave_bool_matrix::as_mxArray (bool interleaved) const
 {
-  mxArray *retval = new mxArray (mxLOGICAL_CLASS, dims (), mxREAL);
+  mxArray *retval = new mxArray (interleaved, mxLOGICAL_CLASS, dims (), mxREAL);
 
-  bool *pr = static_cast<bool *> (retval->get_data ());
+  mxLogical *pd = static_cast<mxLogical *> (retval->get_data ());
 
   mwSize nel = numel ();
 
-  const bool *p = matrix.data ();
+  const bool *pdata = matrix.data ();
 
   for (mwIndex i = 0; i < nel; i++)
-    pr[i] = p[i];
+    pd[i] = pdata[i];
 
   return retval;
 }
--- a/libinterp/octave-value/ov-bool-mat.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-bool-mat.h	Tue Feb 18 13:16:41 2020 -0500
@@ -233,7 +233,7 @@
   // You should not use it anywhere else.
   void * mex_get_data (void) const { return matrix.mex_get_data (); }
 
-  mxArray * as_mxArray (void) const;
+  mxArray * as_mxArray (bool interleaved) const;
 
   // Mapper functions are converted to double for treatment
   octave_value map (unary_mapper_t umap) const
--- a/libinterp/octave-value/ov-bool-sparse.cc	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-bool-sparse.cc	Tue Feb 18 13:16:41 2020 -0500
@@ -802,23 +802,34 @@
 }
 
 mxArray *
-octave_sparse_bool_matrix::as_mxArray (void) const
+octave_sparse_bool_matrix::as_mxArray (bool interleaved) const
 {
   mwSize nz = nzmax ();
-  mxArray *retval = new mxArray (mxLOGICAL_CLASS, rows (), columns (),
-                                 nz, mxREAL);
-  bool *pr = static_cast<bool *> (retval->get_data ());
+  mwSize nr = rows ();
+  mwSize nc = columns ();
+
+  mxArray *retval = new mxArray (interleaved, mxLOGICAL_CLASS, nr, nc, nz,
+                                 mxREAL);
+
+  mxLogical *pd = static_cast<mxLogical *> (retval->get_data ());
   mwIndex *ir = retval->get_ir ();
-  mwIndex *jc = retval->get_jc ();
+
+  const bool *pdata = matrix.data ();
+  const octave_idx_type *pridx = matrix.ridx ();
 
   for (mwIndex i = 0; i < nz; i++)
     {
-      pr[i] = matrix.data (i);
-      ir[i] = matrix.ridx (i);
+      pd[i] = pdata[i];
+
+      ir[i] = pridx[i];
     }
 
-  for (mwIndex i = 0; i < columns () + 1; i++)
-    jc[i] = matrix.cidx (i);
+  mwIndex *jc = retval->get_jc ();
+
+  const octave_idx_type *pcidx = matrix.cidx ();
+
+  for (mwIndex i = 0; i < nc + 1; i++)
+    jc[i] = pcidx[i];
 
   return retval;
 }
--- a/libinterp/octave-value/ov-bool-sparse.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-bool-sparse.h	Tue Feb 18 13:16:41 2020 -0500
@@ -143,7 +143,7 @@
 
   bool load_hdf5 (octave_hdf5_id loc_id, const char *name);
 
-  mxArray * as_mxArray (void) const;
+  mxArray * as_mxArray (bool interleaved) const;
 
   // Mapper functions are converted to double for treatment
   octave_value map (unary_mapper_t umap) const
--- a/libinterp/octave-value/ov-bool.cc	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-bool.cc	Tue Feb 18 13:16:41 2020 -0500
@@ -312,13 +312,13 @@
 }
 
 mxArray *
-octave_bool::as_mxArray (void) const
+octave_bool::as_mxArray (bool interleaved) const
 {
-  mxArray *retval = new mxArray (mxLOGICAL_CLASS, 1, 1, mxREAL);
+  mxArray *retval = new mxArray (interleaved, mxLOGICAL_CLASS, 1, 1, mxREAL);
 
-  bool *pr = static_cast<bool *> (retval->get_data ());
+  mxLogical *pd = static_cast<mxLogical *> (retval->get_data ());
 
-  pr[0] = scalar;
+  pd[0] = scalar;
 
   return retval;
 }
--- a/libinterp/octave-value/ov-bool.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-bool.h	Tue Feb 18 13:16:41 2020 -0500
@@ -246,7 +246,7 @@
                      skip, flt_fmt);
   }
 
-  mxArray * as_mxArray (void) const;
+  mxArray * as_mxArray (bool interleaved) const;
 
   // Mapper functions are converted to double for treatment
   octave_value map (unary_mapper_t umap) const
--- a/libinterp/octave-value/ov-cell.cc	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-cell.cc	Tue Feb 18 13:16:41 2020 -0500
@@ -1410,9 +1410,9 @@
 */
 
 mxArray *
-octave_cell::as_mxArray (void) const
+octave_cell::as_mxArray (bool interleaved) const
 {
-  mxArray *retval = new mxArray (dims ());
+  mxArray *retval = new mxArray (interleaved, dims ());
 
   mxArray **elts = static_cast<mxArray **> (retval->get_data ());
 
@@ -1421,7 +1421,7 @@
   const octave_value *p = matrix.data ();
 
   for (mwIndex i = 0; i < nel; i++)
-    elts[i] = new mxArray (p[i]);
+    elts[i] = new mxArray (interleaved, p[i]);
 
   return retval;
 }
--- a/libinterp/octave-value/ov-cell.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-cell.h	Tue Feb 18 13:16:41 2020 -0500
@@ -172,7 +172,7 @@
 
   octave_value map (unary_mapper_t umap) const;
 
-  mxArray * as_mxArray (void) const;
+  mxArray * as_mxArray (bool interleaved) const;
 
   // Unsafe.  This function exists to support the MEX interface.
   // You should not use it anywhere else.
--- a/libinterp/octave-value/ov-ch-mat.cc	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-ch-mat.cc	Tue Feb 18 13:16:41 2020 -0500
@@ -222,18 +222,18 @@
 }
 
 mxArray *
-octave_char_matrix::as_mxArray (void) const
+octave_char_matrix::as_mxArray (bool interleaved) const
 {
-  mxArray *retval = new mxArray (mxCHAR_CLASS, dims (), mxREAL);
+  mxArray *retval = new mxArray (interleaved, mxCHAR_CLASS, dims (), mxREAL);
 
-  mxChar *pr = static_cast<mxChar *> (retval->get_data ());
+  mxChar *pd = static_cast<mxChar *> (retval->get_data ());
 
   mwSize nel = numel ();
 
-  const char *p = matrix.data ();
+  const char *pdata = matrix.data ();
 
   for (mwIndex i = 0; i < nel; i++)
-    pr[i] = p[i];
+    pd[i] = pdata[i];
 
   return retval;
 }
--- a/libinterp/octave-value/ov-ch-mat.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-ch-mat.h	Tue Feb 18 13:16:41 2020 -0500
@@ -167,7 +167,7 @@
   // You should not use it anywhere else.
   void * mex_get_data (void) const { return matrix.mex_get_data (); }
 
-  mxArray * as_mxArray (void) const;
+  mxArray * as_mxArray (bool interleaved) const;
 
   octave_value map (unary_mapper_t umap) const;
 };
--- a/libinterp/octave-value/ov-class.cc	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-class.cc	Tue Feb 18 13:16:41 2020 -0500
@@ -1637,7 +1637,7 @@
 }
 
 mxArray *
-octave_class::as_mxArray (void) const
+octave_class::as_mxArray (bool) const
 {
   err_wrong_type_arg ("octave_class::as_mxArray ()", type_name ());
 }
--- a/libinterp/octave-value/ov-class.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-class.h	Tue Feb 18 13:16:41 2020 -0500
@@ -200,7 +200,7 @@
 
   bool load_hdf5 (octave_hdf5_id loc_id, const char *name);
 
-  mxArray * as_mxArray (void) const;
+  mxArray * as_mxArray (bool interleaved) const;
 
 private:
   octave_map map;
--- a/libinterp/octave-value/ov-complex.cc	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-complex.cc	Tue Feb 18 13:16:41 2020 -0500
@@ -472,15 +472,26 @@
 }
 
 mxArray *
-octave_complex::as_mxArray (void) const
+octave_complex::as_mxArray (bool interleaved) const
 {
-  mxArray *retval = new mxArray (mxDOUBLE_CLASS, 1, 1, mxCOMPLEX);
+  mxArray *retval = new mxArray (interleaved, mxDOUBLE_CLASS, 1, 1, mxCOMPLEX);
+
+  if (interleaved)
+    {
+      mxComplexDouble *pd
+        = reinterpret_cast<mxComplexDouble *> (retval->get_complex_doubles ());
 
-  double *pr = static_cast<double *> (retval->get_data ());
-  double *pi = static_cast<double *> (retval->get_imag_data ());
+      pd[0].real = scalar.real ();
+      pd[0].imag = scalar.imag ();
+    }
+  else
+    {
+      mxDouble *pr = static_cast<mxDouble *> (retval->get_data ());
+      mxDouble *pi = static_cast<mxDouble *> (retval->get_imag_data ());
 
-  pr[0] = scalar.real ();
-  pi[0] = scalar.imag ();
+      pr[0] = scalar.real ();
+      pi[0] = scalar.imag ();
+    }
 
   return retval;
 }
--- a/libinterp/octave-value/ov-complex.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-complex.h	Tue Feb 18 13:16:41 2020 -0500
@@ -195,7 +195,7 @@
                      skip, flt_fmt);
   }
 
-  mxArray * as_mxArray (void) const;
+  mxArray * as_mxArray (bool interleaved) const;
 
   octave_value map (unary_mapper_t umap) const;
 
--- a/libinterp/octave-value/ov-cx-mat.cc	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-cx-mat.cc	Tue Feb 18 13:16:41 2020 -0500
@@ -724,21 +724,36 @@
 }
 
 mxArray *
-octave_complex_matrix::as_mxArray (void) const
+octave_complex_matrix::as_mxArray (bool interleaved) const
 {
-  mxArray *retval = new mxArray (mxDOUBLE_CLASS, dims (), mxCOMPLEX);
-
-  double *pr = static_cast<double *> (retval->get_data ());
-  double *pi = static_cast<double *> (retval->get_imag_data ());
+  mxArray *retval = new mxArray (interleaved, mxDOUBLE_CLASS, dims (),
+                                 mxCOMPLEX);
 
   mwSize nel = numel ();
 
-  const Complex *p = matrix.data ();
+  const Complex *pdata = matrix.data ();
+
+  if (interleaved)
+    {
+      mxComplexDouble *pd
+        = static_cast<mxComplexDouble *> (retval->get_data ());
 
-  for (mwIndex i = 0; i < nel; i++)
+      for (mwIndex i = 0; i < nel; i++)
+        {
+          pd[i].real = pdata[i].real ();
+          pd[i].imag = pdata[i].imag ();
+        }
+    }
+  else
     {
-      pr[i] = std::real (p[i]);
-      pi[i] = std::imag (p[i]);
+      mxDouble *pr = static_cast<mxDouble *> (retval->get_data ());
+      mxDouble *pi = static_cast<mxDouble *> (retval->get_imag_data ());
+
+      for (mwIndex i = 0; i < nel; i++)
+        {
+          pr[i] = pdata[i].real ();
+          pi[i] = pdata[i].imag ();
+        }
     }
 
   return retval;
--- a/libinterp/octave-value/ov-cx-mat.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-cx-mat.h	Tue Feb 18 13:16:41 2020 -0500
@@ -175,7 +175,7 @@
 
   void print_raw (std::ostream& os, bool pr_as_read_syntax = false) const;
 
-  mxArray * as_mxArray (void) const;
+  mxArray * as_mxArray (bool interleaved) const;
 
   octave_value map (unary_mapper_t umap) const;
 
--- a/libinterp/octave-value/ov-cx-sparse.cc	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-cx-sparse.cc	Tue Feb 18 13:16:41 2020 -0500
@@ -874,26 +874,53 @@
 }
 
 mxArray *
-octave_sparse_complex_matrix::as_mxArray (void) const
+octave_sparse_complex_matrix::as_mxArray (bool interleaved) const
 {
   mwSize nz = nzmax ();
-  mxArray *retval = new mxArray (mxDOUBLE_CLASS, rows (), columns (),
-                                 nz, mxCOMPLEX);
-  double *pr = static_cast<double *> (retval->get_data ());
-  double *pi = static_cast<double *> (retval->get_imag_data ());
+  mwSize nr = rows ();
+  mwSize nc = columns ();
+
+  mxArray *retval = new mxArray (interleaved, mxDOUBLE_CLASS, nr, nc, nz,
+                                 mxCOMPLEX);
+
   mwIndex *ir = retval->get_ir ();
+
+  const Complex *pdata = matrix.data ();
+  const octave_idx_type *pridx = matrix.ridx ();
+
+  if (interleaved)
+    {
+      mxComplexDouble *pd
+        = static_cast<mxComplexDouble *> (retval->get_data ());
+
+      for (mwIndex i = 0; i < nz; i++)
+        {
+          pd[i].real = pdata[i].real ();
+          pd[i].imag = pdata[i].imag ();
+
+          ir[i] = pridx[i];
+        }
+    }
+  else
+    {
+      mxDouble *pr = static_cast<mxDouble *> (retval->get_data ());
+      mxDouble *pi = static_cast<mxDouble *> (retval->get_imag_data ());
+
+      for (mwIndex i = 0; i < nz; i++)
+        {
+          pr[i] = pdata[i].real ();
+          pi[i] = pdata[i].imag ();
+
+          ir[i] = pridx[i];
+        }
+    }
+
   mwIndex *jc = retval->get_jc ();
 
-  for (mwIndex i = 0; i < nz; i++)
-    {
-      Complex val = matrix.data (i);
-      pr[i] = val.real ();
-      pi[i] = val.imag ();
-      ir[i] = matrix.ridx (i);
-    }
+  const octave_idx_type *pcidx = matrix.cidx ();
 
-  for (mwIndex i = 0; i < columns () + 1; i++)
-    jc[i] = matrix.cidx (i);
+  for (mwIndex i = 0; i < nc + 1; i++)
+    jc[i] = pcidx[i];
 
   return retval;
 }
--- a/libinterp/octave-value/ov-cx-sparse.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-cx-sparse.h	Tue Feb 18 13:16:41 2020 -0500
@@ -149,7 +149,7 @@
 
   bool load_hdf5 (octave_hdf5_id loc_id, const char *name);
 
-  mxArray * as_mxArray (void) const;
+  mxArray * as_mxArray (bool interleaved) const;
 
   octave_value map (unary_mapper_t umap) const;
 
--- a/libinterp/octave-value/ov-float.cc	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-float.cc	Tue Feb 18 13:16:41 2020 -0500
@@ -335,13 +335,13 @@
 }
 
 mxArray *
-octave_float_scalar::as_mxArray (void) const
+octave_float_scalar::as_mxArray (bool interleaved) const
 {
-  mxArray *retval = new mxArray (mxSINGLE_CLASS, 1, 1, mxREAL);
+  mxArray *retval = new mxArray (interleaved, mxSINGLE_CLASS, 1, 1, mxREAL);
 
-  float *pr = static_cast<float *> (retval->get_data ());
+  mxSingle *pd = static_cast<mxSingle *> (retval->get_data ());
 
-  pr[0] = scalar;
+  pd[0] = scalar;
 
   return retval;
 }
--- a/libinterp/octave-value/ov-float.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-float.h	Tue Feb 18 13:16:41 2020 -0500
@@ -266,7 +266,7 @@
                      skip, flt_fmt);
   }
 
-  mxArray * as_mxArray (void) const;
+  mxArray * as_mxArray (bool interleaved) const;
 
   octave_value map (unary_mapper_t umap) const;
 
--- a/libinterp/octave-value/ov-flt-complex.cc	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-flt-complex.cc	Tue Feb 18 13:16:41 2020 -0500
@@ -414,15 +414,26 @@
 }
 
 mxArray *
-octave_float_complex::as_mxArray (void) const
+octave_float_complex::as_mxArray (bool interleaved) const
 {
-  mxArray *retval = new mxArray (mxSINGLE_CLASS, 1, 1, mxCOMPLEX);
+  mxArray *retval = new mxArray (interleaved, mxSINGLE_CLASS, 1, 1, mxCOMPLEX);
+
+  if (interleaved)
+    {
+      mxComplexSingle *pd
+        = static_cast<mxComplexSingle *> (retval->get_data ());
 
-  float *pr = static_cast<float *> (retval->get_data ());
-  float *pi = static_cast<float *> (retval->get_imag_data ());
+      pd[0].real = scalar.real ();
+      pd[0].imag = scalar.imag ();
+    }
+  else
+    {
+      mxSingle *pr = static_cast<mxSingle *> (retval->get_data ());
+      mxSingle *pi = static_cast<mxSingle *> (retval->get_imag_data ());
 
-  pr[0] = scalar.real ();
-  pi[0] = scalar.imag ();
+      pr[0] = scalar.real ();
+      pi[0] = scalar.imag ();
+    }
 
   return retval;
 }
--- a/libinterp/octave-value/ov-flt-complex.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-flt-complex.h	Tue Feb 18 13:16:41 2020 -0500
@@ -191,7 +191,7 @@
                      skip, flt_fmt);
   }
 
-  mxArray * as_mxArray (void) const;
+  mxArray * as_mxArray (bool interleaved) const;
 
   octave_value map (unary_mapper_t umap) const;
 
--- a/libinterp/octave-value/ov-flt-cx-mat.cc	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-flt-cx-mat.cc	Tue Feb 18 13:16:41 2020 -0500
@@ -676,21 +676,36 @@
 }
 
 mxArray *
-octave_float_complex_matrix::as_mxArray (void) const
+octave_float_complex_matrix::as_mxArray (bool interleaved) const
 {
-  mxArray *retval = new mxArray (mxSINGLE_CLASS, dims (), mxCOMPLEX);
-
-  float *pr = static_cast<float *> (retval->get_data ());
-  float *pi = static_cast<float *> (retval->get_imag_data ());
+  mxArray *retval = new mxArray (interleaved, mxSINGLE_CLASS, dims (),
+                                 mxCOMPLEX);
 
   mwSize nel = numel ();
 
-  const FloatComplex *p = matrix.data ();
+  const FloatComplex *pdata = matrix.data ();
+
+  if (interleaved)
+    {
+      mxComplexSingle *pd
+        = static_cast<mxComplexSingle *> (retval->get_data ());
 
-  for (mwIndex i = 0; i < nel; i++)
+      for (mwIndex i = 0; i < nel; i++)
+        {
+          pd[i].real = pdata[i].real ();
+          pd[i].imag = pdata[i].imag ();
+        }
+    }
+  else
     {
-      pr[i] = std::real (p[i]);
-      pi[i] = std::imag (p[i]);
+      mxSingle *pr = static_cast<mxSingle *> (retval->get_data ());
+      mxSingle *pi = static_cast<mxSingle *> (retval->get_imag_data ());
+
+      for (mwIndex i = 0; i < nel; i++)
+        {
+          pr[i] = pdata[i].real ();
+          pi[i] = pdata[i].imag ();
+        }
     }
 
   return retval;
--- a/libinterp/octave-value/ov-flt-cx-mat.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-flt-cx-mat.h	Tue Feb 18 13:16:41 2020 -0500
@@ -171,7 +171,7 @@
 
   void print_raw (std::ostream& os, bool pr_as_read_syntax = false) const;
 
-  mxArray * as_mxArray (void) const;
+  mxArray * as_mxArray (bool interleaved) const;
 
   octave_value map (unary_mapper_t umap) const;
 
--- a/libinterp/octave-value/ov-flt-re-mat.cc	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-flt-re-mat.cc	Tue Feb 18 13:16:41 2020 -0500
@@ -717,18 +717,18 @@
 }
 
 mxArray *
-octave_float_matrix::as_mxArray (void) const
+octave_float_matrix::as_mxArray (bool interleaved) const
 {
-  mxArray *retval = new mxArray (mxSINGLE_CLASS, dims (), mxREAL);
+  mxArray *retval = new mxArray (interleaved, mxSINGLE_CLASS, dims (), mxREAL);
 
-  float *pr = static_cast<float *> (retval->get_data ());
+  mxSingle *pd = static_cast<mxSingle *> (retval->get_data ());
 
   mwSize nel = numel ();
 
-  const float *p = matrix.data ();
+  const float *pdata = matrix.data ();
 
   for (mwIndex i = 0; i < nel; i++)
-    pr[i] = p[i];
+    pd[i] = pdata[i];
 
   return retval;
 }
--- a/libinterp/octave-value/ov-flt-re-mat.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-flt-re-mat.h	Tue Feb 18 13:16:41 2020 -0500
@@ -217,7 +217,7 @@
   // You should not use it anywhere else.
   void * mex_get_data (void) const { return matrix.mex_get_data (); }
 
-  mxArray * as_mxArray (void) const;
+  mxArray * as_mxArray (bool interleaved) const;
 
   octave_value map (unary_mapper_t umap) const;
 
--- a/libinterp/octave-value/ov-intx.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-intx.h	Tue Feb 18 13:16:41 2020 -0500
@@ -315,19 +315,20 @@
   // You should not use it anywhere else.
   void * mex_get_data (void) const { return matrix.mex_get_data (); }
 
-  mxArray * as_mxArray (void) const
+  mxArray * as_mxArray (bool interleaved) const
   {
-    mxArray *retval = new mxArray (OCTAVE_INT_MX_CLASS, dims (), mxREAL);
+    mxArray *retval = new mxArray (interleaved, OCTAVE_INT_MX_CLASS, dims (),
+                                   mxREAL);
 
-    OCTAVE_INT_T::val_type *pr = static_cast<OCTAVE_INT_T::val_type *>
-                                 (retval->get_data ());
+    OCTAVE_INT_T::val_type *pd
+      = static_cast<OCTAVE_INT_T::val_type *> (retval->get_data ());
 
     mwSize nel = numel ();
 
-    const OCTAVE_INT_T *p = matrix.data ();
+    const OCTAVE_INT_T *pdata = matrix.data ();
 
     for (mwIndex i = 0; i < nel; i++)
-      pr[i] = p[i].value ();
+      pd[i] = pdata[i].value ();
 
     return retval;
   }
@@ -637,14 +638,15 @@
   // You should not use it anywhere else.
   void * mex_get_data (void) const { return scalar.mex_get_data (); }
 
-  mxArray * as_mxArray (void) const
+  mxArray * as_mxArray (bool interleaved) const
   {
-    mxArray *retval = new mxArray (OCTAVE_INT_MX_CLASS, 1, 1, mxREAL);
+    mxArray *retval = new mxArray (interleaved, OCTAVE_INT_MX_CLASS, 1, 1,
+                                   mxREAL);
 
-    OCTAVE_INT_T::val_type *pr = static_cast<OCTAVE_INT_T::val_type *>
-                                 (retval->get_data ());
+    OCTAVE_INT_T::val_type *pd
+      = static_cast<OCTAVE_INT_T::val_type *> (retval->get_data ());
 
-    pr[0] = scalar.value ();
+    pd[0] = scalar.value ();
 
     return retval;
   }
--- a/libinterp/octave-value/ov-lazy-idx.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-lazy-idx.h	Tue Feb 18 13:16:41 2020 -0500
@@ -241,9 +241,9 @@
     return make_value ().mex_get_data ();
   }
 
-  mxArray * as_mxArray (void) const
+  mxArray * as_mxArray (bool interleaved) const
   {
-    return make_value ().as_mxArray ();
+    return make_value ().as_mxArray (interleaved);
   }
 
   octave_value map (unary_mapper_t umap) const
--- a/libinterp/octave-value/ov-perm.cc	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-perm.cc	Tue Feb 18 13:16:41 2020 -0500
@@ -434,9 +434,9 @@
 }
 
 mxArray *
-octave_perm_matrix::as_mxArray (void) const
+octave_perm_matrix::as_mxArray (bool interleaved) const
 {
-  return to_dense ().as_mxArray ();
+  return to_dense ().as_mxArray (interleaved);
 }
 
 bool
--- a/libinterp/octave-value/ov-perm.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-perm.h	Tue Feb 18 13:16:41 2020 -0500
@@ -240,7 +240,7 @@
              oct_data_conv::data_type output_type, int skip,
              octave::mach_info::float_format flt_fmt) const;
 
-  mxArray * as_mxArray (void) const;
+  mxArray * as_mxArray (bool interleaved) const;
 
   bool print_as_scalar (void) const;
 
--- a/libinterp/octave-value/ov-range.cc	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-range.cc	Tue Feb 18 13:16:41 2020 -0500
@@ -771,20 +771,20 @@
 }
 
 mxArray *
-octave_range::as_mxArray (void) const
+octave_range::as_mxArray (bool interleaved) const
 {
-  mxArray *retval = new mxArray (mxDOUBLE_CLASS, dims (), mxREAL);
+  mxArray *retval = new mxArray (interleaved, mxDOUBLE_CLASS, dims (), mxREAL);
 
-  double *pr = static_cast<double *> (retval->get_data ());
+  mxDouble *pd = static_cast<mxDouble *> (retval->get_data ());
 
   mwSize nel = numel ();
 
   Matrix m = matrix_value ();
 
-  const double *p = m.data ();
+  const double *pdata = m.data ();
 
   for (mwSize i = 0; i < nel; i++)
-    pr[i] = p[i];
+    pd[i] = pdata[i];
 
   return retval;
 }
--- a/libinterp/octave-value/ov-range.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-range.h	Tue Feb 18 13:16:41 2020 -0500
@@ -306,7 +306,7 @@
     return os.write (matrix_value (), block_size, output_type, skip, flt_fmt);
   }
 
-  mxArray * as_mxArray (void) const;
+  mxArray * as_mxArray (bool interleaved) const;
 
   octave_value map (unary_mapper_t umap) const
   {
--- a/libinterp/octave-value/ov-re-mat.cc	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-re-mat.cc	Tue Feb 18 13:16:41 2020 -0500
@@ -844,18 +844,18 @@
 }
 
 mxArray *
-octave_matrix::as_mxArray (void) const
+octave_matrix::as_mxArray (bool interleaved) const
 {
-  mxArray *retval = new mxArray (mxDOUBLE_CLASS, dims (), mxREAL);
+  mxArray *retval = new mxArray (interleaved, mxDOUBLE_CLASS, dims (), mxREAL);
 
-  double *pr = static_cast<double *> (retval->get_data ());
+  mxDouble *pd = static_cast<mxDouble *> (retval->get_data ());
 
   mwSize nel = numel ();
 
-  const double *p = matrix.data ();
+  const double *pdata = matrix.data ();
 
   for (mwIndex i = 0; i < nel; i++)
-    pr[i] = p[i];
+    pd[i] = pdata[i];
 
   return retval;
 }
--- a/libinterp/octave-value/ov-re-mat.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-re-mat.h	Tue Feb 18 13:16:41 2020 -0500
@@ -241,7 +241,7 @@
   // You should not use it anywhere else.
   void * mex_get_data (void) const { return matrix.mex_get_data (); }
 
-  mxArray * as_mxArray (void) const;
+  mxArray * as_mxArray (bool interleaved) const;
 
   octave_value map (unary_mapper_t umap) const;
 
--- a/libinterp/octave-value/ov-re-sparse.cc	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-re-sparse.cc	Tue Feb 18 13:16:41 2020 -0500
@@ -861,24 +861,34 @@
 }
 
 mxArray *
-octave_sparse_matrix::as_mxArray (void) const
+octave_sparse_matrix::as_mxArray (bool interleaved) const
 {
   mwSize nz = nzmax ();
   mwSize nr = rows ();
   mwSize nc = columns ();
-  mxArray *retval = new mxArray (mxDOUBLE_CLASS, nr, nc, nz, mxREAL);
-  double *pr = static_cast<double *> (retval->get_data ());
+
+  mxArray *retval = new mxArray (interleaved, mxDOUBLE_CLASS, nr, nc, nz,
+                                 mxREAL);
+
+  mxDouble *pd = static_cast<mxDouble *> (retval->get_data ());
   mwIndex *ir = retval->get_ir ();
-  mwIndex *jc = retval->get_jc ();
+
+  const double *pdata = matrix.data ();
+  const octave_idx_type *pridx = matrix.ridx ();
 
   for (mwIndex i = 0; i < nz; i++)
     {
-      pr[i] = matrix.data (i);
-      ir[i] = matrix.ridx (i);
+      pd[i] = pdata[i];
+
+      ir[i] = pridx[i];
     }
 
+  mwIndex *jc = retval->get_jc ();
+
+  const octave_idx_type *pcidx = matrix.cidx ();
+
   for (mwIndex i = 0; i < nc + 1; i++)
-    jc[i] = matrix.cidx (i);
+    jc[i] = pcidx[i];
 
   return retval;
 }
--- a/libinterp/octave-value/ov-re-sparse.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-re-sparse.h	Tue Feb 18 13:16:41 2020 -0500
@@ -152,7 +152,7 @@
 
   bool load_hdf5 (octave_hdf5_id loc_id, const char *name);
 
-  mxArray * as_mxArray (void) const;
+  mxArray * as_mxArray (bool interleaved) const;
 
   octave_value map (unary_mapper_t umap) const;
 
--- a/libinterp/octave-value/ov-scalar.cc	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-scalar.cc	Tue Feb 18 13:16:41 2020 -0500
@@ -356,13 +356,13 @@
 }
 
 mxArray *
-octave_scalar::as_mxArray (void) const
+octave_scalar::as_mxArray (bool interleaved) const
 {
-  mxArray *retval = new mxArray (mxDOUBLE_CLASS, 1, 1, mxREAL);
+  mxArray *retval = new mxArray (interleaved, mxDOUBLE_CLASS, 1, 1, mxREAL);
 
-  double *pr = static_cast<double *> (retval->get_data ());
+  mxDouble *pd = static_cast<mxDouble *> (retval->get_data ());
 
-  pr[0] = scalar;
+  pd[0] = scalar;
 
   return retval;
 }
--- a/libinterp/octave-value/ov-scalar.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-scalar.h	Tue Feb 18 13:16:41 2020 -0500
@@ -269,7 +269,7 @@
                      skip, flt_fmt);
   }
 
-  mxArray * as_mxArray (void) const;
+  mxArray * as_mxArray (bool interleaved) const;
 
   octave_value map (unary_mapper_t umap) const;
 
--- a/libinterp/octave-value/ov-struct.cc	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-struct.cc	Tue Feb 18 13:16:41 2020 -0500
@@ -1012,7 +1012,7 @@
 }
 
 mxArray *
-octave_struct::as_mxArray (void) const
+octave_struct::as_mxArray (bool interleaved) const
 {
   int nf = nfields ();
   string_vector kv = map_keys ();
@@ -1022,7 +1022,7 @@
   for (int i = 0; i < nf; i++)
     f[i] = kv[i].c_str ();
 
-  mxArray *retval = new mxArray (dims (), nf, f);
+  mxArray *retval = new mxArray (interleaved, dims (), nf, f);
 
   mxArray **elts = static_cast<mxArray **> (retval->get_data ());
 
@@ -1038,7 +1038,7 @@
 
       mwIndex k = 0;
       for (mwIndex j = i; j < ntot; j += nf)
-        elts[j] = new mxArray (p[k++]);
+        elts[j] = new mxArray (interleaved, p[k++]);
     }
 
   return retval;
@@ -1630,7 +1630,7 @@
 }
 
 mxArray *
-octave_scalar_struct::as_mxArray (void) const
+octave_scalar_struct::as_mxArray (bool interleaved) const
 {
   int nf = nfields ();
   string_vector kv = map_keys ();
@@ -1640,7 +1640,7 @@
   for (int i = 0; i < nf; i++)
     f[i] = kv[i].c_str ();
 
-  mxArray *retval = new mxArray (dims (), nf, f);
+  mxArray *retval = new mxArray (interleaved, dims (), nf, f);
 
   mxArray **elts = static_cast<mxArray **> (retval->get_data ());
 
@@ -1656,7 +1656,7 @@
 
       mwIndex k = 0;
       for (mwIndex j = i; j < ntot; j += nf)
-        elts[j] = new mxArray (p[k++]);
+        elts[j] = new mxArray (interleaved, p[k++]);
     }
 
   return retval;
--- a/libinterp/octave-value/ov-struct.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov-struct.h	Tue Feb 18 13:16:41 2020 -0500
@@ -150,7 +150,7 @@
 
   bool load_hdf5 (octave_hdf5_id loc_id, const char *name);
 
-  mxArray * as_mxArray (void) const;
+  mxArray * as_mxArray (bool interleaved) const;
 
   octave_value
   fast_elem_extract (octave_idx_type n) const;
@@ -274,7 +274,7 @@
 
   bool load_hdf5 (octave_hdf5_id loc_id, const char *name);
 
-  mxArray * as_mxArray (void) const;
+  mxArray * as_mxArray (bool interleaved) const;
 
   bool fast_elem_insert_self (void *where, builtin_type_t btyp) const;
 
--- a/libinterp/octave-value/ov.cc	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov.cc	Tue Feb 18 13:16:41 2020 -0500
@@ -2626,6 +2626,75 @@
   rep->print_info (os, prefix + ' ');
 }
 
+void *
+octave_value::mex_get_data (mxClassID class_id, mxComplexity complexity) const
+{
+  // If class_id is set to mxUNKNOWN_CLASS, return data for any type.
+  // Otherwise, require that REP matches the requested type and
+  // complexity.
+
+  if (class_id != mxUNKNOWN_CLASS)
+    {
+      bool type_ok = false;
+
+      switch (class_id)
+        {
+        case mxDOUBLE_CLASS:
+          type_ok = is_double_type ();
+          break;
+
+        case mxSINGLE_CLASS:
+          type_ok = is_single_type ();
+          break;
+
+        case mxINT8_CLASS:
+          type_ok = is_int8_type ();
+          break;
+
+        case mxINT16_CLASS:
+          type_ok = is_int16_type ();
+          break;
+
+        case mxINT32_CLASS:
+          type_ok = is_int32_type ();
+          break;
+
+        case mxINT64_CLASS:
+          type_ok = is_int64_type ();
+          break;
+
+        case mxUINT8_CLASS:
+          type_ok = is_uint8_type ();
+          break;
+
+        case mxUINT16_CLASS:
+          type_ok = is_uint16_type ();
+          break;
+
+        case mxUINT32_CLASS:
+          type_ok = is_uint32_type ();
+          break;
+
+        case mxUINT64_CLASS:
+          type_ok = is_uint64_type ();
+          break;
+
+        default:
+          // We only expect to see numeric types explicitly requested.
+          error ("mex_get_data: unexpected type requested");
+          break;
+        }
+
+      if (! type_ok)
+        error ("mex_get_data: type mismatch");
+
+      if (complexity == mxCOMPLEX && ! iscomplex ())
+        error ("mex_get_data: objectis not complex as requested");
+    }
+
+  return rep->mex_get_data ();
+}
+
 OCTAVE_NORETURN static void
 err_unary_op (const std::string& on, const std::string& tn)
 {
--- a/libinterp/octave-value/ov.h	Tue Feb 18 12:50:18 2020 -0500
+++ b/libinterp/octave-value/ov.h	Tue Feb 18 13:16:41 2020 -0500
@@ -1328,13 +1328,15 @@
 
   // Unsafe.  These functions exist to support the MEX interface.
   // You should not use them anywhere else.
-  void * mex_get_data (void) const { return rep->mex_get_data (); }
+  void * mex_get_data (mxClassID class_id = mxUNKNOWN_CLASS,
+                       mxComplexity complexity = mxREAL) const;
 
   octave_idx_type * mex_get_ir (void) const { return rep->mex_get_ir (); }
 
   octave_idx_type * mex_get_jc (void) const { return rep->mex_get_jc (); }
 
-  mxArray * as_mxArray (void) const { return rep->as_mxArray (); }
+  mxArray * as_mxArray (bool interleaved = false) const
+  { return rep->as_mxArray (interleaved); }
 
   octave_value diag (octave_idx_type k = 0) const
   { return rep->diag (k); }