Mercurial > octave-nkf
view libinterp/corefcn/dot.cc @ 17787:175b392e91fe
Use GNU style coding conventions for code in libinterp/
* libinterp/corefcn/Cell.h, libinterp/corefcn/__contourc__.cc,
libinterp/corefcn/__dispatch__.cc, libinterp/corefcn/__lin_interpn__.cc,
libinterp/corefcn/__pchip_deriv__.cc, libinterp/corefcn/__qp__.cc,
libinterp/corefcn/balance.cc, libinterp/corefcn/besselj.cc,
libinterp/corefcn/betainc.cc, libinterp/corefcn/bitfcns.cc,
libinterp/corefcn/bsxfun.cc, libinterp/corefcn/c-file-ptr-stream.cc,
libinterp/corefcn/c-file-ptr-stream.h, libinterp/corefcn/cellfun.cc,
libinterp/corefcn/colloc.cc, libinterp/corefcn/comment-list.h,
libinterp/corefcn/conv2.cc, libinterp/corefcn/daspk.cc,
libinterp/corefcn/dasrt.cc, libinterp/corefcn/dassl.cc,
libinterp/corefcn/data.cc, libinterp/corefcn/debug.cc,
libinterp/corefcn/defaults.cc, libinterp/corefcn/defaults.in.h,
libinterp/corefcn/defun-int.h, libinterp/corefcn/defun.cc,
libinterp/corefcn/det.cc, libinterp/corefcn/dirfns.cc,
libinterp/corefcn/display.cc, libinterp/corefcn/dlmread.cc,
libinterp/corefcn/dot.cc, libinterp/corefcn/dynamic-ld.cc,
libinterp/corefcn/dynamic-ld.h, libinterp/corefcn/eig.cc,
libinterp/corefcn/ellipj.cc, libinterp/corefcn/error.cc,
libinterp/corefcn/error.h, libinterp/corefcn/event-queue.h,
libinterp/corefcn/fft.cc, libinterp/corefcn/fft2.cc, libinterp/corefcn/fftn.cc,
libinterp/corefcn/file-io.cc, libinterp/corefcn/filter.cc,
libinterp/corefcn/find.cc, libinterp/corefcn/gammainc.cc,
libinterp/corefcn/gcd.cc, libinterp/corefcn/getgrent.cc,
libinterp/corefcn/getpwent.cc, libinterp/corefcn/getrusage.cc,
libinterp/corefcn/givens.cc, libinterp/corefcn/gl-render.cc,
libinterp/corefcn/gl2ps-renderer.cc, libinterp/corefcn/gl2ps-renderer.h,
libinterp/corefcn/graphics.cc, libinterp/corefcn/graphics.in.h,
libinterp/corefcn/gripes.cc, libinterp/corefcn/gripes.h,
libinterp/corefcn/help.cc, libinterp/corefcn/hess.cc,
libinterp/corefcn/hex2num.cc, libinterp/corefcn/input.cc,
libinterp/corefcn/input.h, libinterp/corefcn/inv.cc,
libinterp/corefcn/jit-ir.h, libinterp/corefcn/jit-typeinfo.cc,
libinterp/corefcn/jit-typeinfo.h, libinterp/corefcn/jit-util.h,
libinterp/corefcn/kron.cc, libinterp/corefcn/load-path.cc,
libinterp/corefcn/load-path.h, libinterp/corefcn/load-save.cc,
libinterp/corefcn/load-save.h, libinterp/corefcn/lookup.cc,
libinterp/corefcn/ls-ascii-helper.cc, libinterp/corefcn/ls-hdf5.cc,
libinterp/corefcn/ls-hdf5.h, libinterp/corefcn/ls-mat-ascii.cc,
libinterp/corefcn/ls-mat-ascii.h, libinterp/corefcn/ls-mat4.cc,
libinterp/corefcn/ls-mat5.cc, libinterp/corefcn/ls-mat5.h,
libinterp/corefcn/ls-oct-ascii.cc, libinterp/corefcn/lsode.cc,
libinterp/corefcn/lu.cc, libinterp/corefcn/luinc.cc,
libinterp/corefcn/mappers.cc, libinterp/corefcn/matrix_type.cc,
libinterp/corefcn/max.cc, libinterp/corefcn/md5sum.cc,
libinterp/corefcn/mex.cc, libinterp/corefcn/mexproto.h,
libinterp/corefcn/mgorth.cc, libinterp/corefcn/mxarray.in.h,
libinterp/corefcn/nproc.cc, libinterp/corefcn/oct-hist.cc,
libinterp/corefcn/oct-lvalue.h, libinterp/corefcn/oct-map.cc,
libinterp/corefcn/oct-map.h, libinterp/corefcn/oct-obj.h,
libinterp/corefcn/oct-prcstrm.h, libinterp/corefcn/oct-stdstrm.h,
libinterp/corefcn/oct-stream.cc, libinterp/corefcn/oct-stream.h,
libinterp/corefcn/octave-link.cc, libinterp/corefcn/octave-link.h,
libinterp/corefcn/pager.cc, libinterp/corefcn/pinv.cc,
libinterp/corefcn/pr-output.cc, libinterp/corefcn/procstream.h,
libinterp/corefcn/profiler.cc, libinterp/corefcn/pt-jit.cc,
libinterp/corefcn/pt-jit.h, libinterp/corefcn/quad.cc,
libinterp/corefcn/quadcc.cc, libinterp/corefcn/qz.cc,
libinterp/corefcn/rand.cc, libinterp/corefcn/rcond.cc,
libinterp/corefcn/regexp.cc, libinterp/corefcn/schur.cc,
libinterp/corefcn/sighandlers.cc, libinterp/corefcn/sighandlers.h,
libinterp/corefcn/sparse-xdiv.cc, libinterp/corefcn/sparse-xdiv.h,
libinterp/corefcn/sparse-xpow.cc, libinterp/corefcn/sparse.cc,
libinterp/corefcn/spparms.cc, libinterp/corefcn/sqrtm.cc,
libinterp/corefcn/str2double.cc, libinterp/corefcn/strfind.cc,
libinterp/corefcn/strfns.cc, libinterp/corefcn/sub2ind.cc,
libinterp/corefcn/svd.cc, libinterp/corefcn/syl.cc,
libinterp/corefcn/symtab.cc, libinterp/corefcn/symtab.h,
libinterp/corefcn/syscalls.cc, libinterp/corefcn/sysdep.cc,
libinterp/corefcn/sysdep.h, libinterp/corefcn/time.cc,
libinterp/corefcn/toplev.cc, libinterp/corefcn/toplev.h,
libinterp/corefcn/tril.cc, libinterp/corefcn/txt-eng-ft.cc,
libinterp/corefcn/txt-eng-ft.h, libinterp/corefcn/txt-eng.h,
libinterp/corefcn/typecast.cc, libinterp/corefcn/urlwrite.cc,
libinterp/corefcn/utils.cc, libinterp/corefcn/variables.cc,
libinterp/corefcn/variables.h, libinterp/corefcn/xdiv.cc,
libinterp/corefcn/xdiv.h, libinterp/corefcn/xnorm.h, libinterp/corefcn/xpow.cc,
libinterp/corefcn/xpow.h, libinterp/corefcn/zfstream.cc,
libinterp/corefcn/zfstream.h, libinterp/dldfcn/__delaunayn__.cc,
libinterp/dldfcn/__dsearchn__.cc, libinterp/dldfcn/__eigs__.cc,
libinterp/dldfcn/__fltk_uigetfile__.cc, libinterp/dldfcn/__glpk__.cc,
libinterp/dldfcn/__init_fltk__.cc, libinterp/dldfcn/__init_gnuplot__.cc,
libinterp/dldfcn/__magick_read__.cc, libinterp/dldfcn/__voronoi__.cc,
libinterp/dldfcn/amd.cc, libinterp/dldfcn/ccolamd.cc, libinterp/dldfcn/chol.cc,
libinterp/dldfcn/colamd.cc, libinterp/dldfcn/convhulln.cc,
libinterp/dldfcn/dmperm.cc, libinterp/dldfcn/fftw.cc, libinterp/dldfcn/qr.cc,
libinterp/dldfcn/symbfact.cc, libinterp/dldfcn/symrcm.cc,
libinterp/dldfcn/tsearch.cc, libinterp/octave-value/ov-base-diag.cc,
libinterp/octave-value/ov-base-diag.h, libinterp/octave-value/ov-base-int.cc,
libinterp/octave-value/ov-base-int.h, libinterp/octave-value/ov-base-mat.h,
libinterp/octave-value/ov-base-scalar.cc,
libinterp/octave-value/ov-base-scalar.h,
libinterp/octave-value/ov-base-sparse.cc,
libinterp/octave-value/ov-base-sparse.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-builtin.cc,
libinterp/octave-value/ov-builtin.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-colon.h,
libinterp/octave-value/ov-complex.cc, libinterp/octave-value/ov-complex.h,
libinterp/octave-value/ov-cx-diag.cc, libinterp/octave-value/ov-cx-diag.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-dld-fcn.h, libinterp/octave-value/ov-fcn-handle.cc,
libinterp/octave-value/ov-fcn-handle.h,
libinterp/octave-value/ov-fcn-inline.cc,
libinterp/octave-value/ov-fcn-inline.h, libinterp/octave-value/ov-fcn.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-diag.cc,
libinterp/octave-value/ov-flt-cx-diag.h,
libinterp/octave-value/ov-flt-cx-mat.cc,
libinterp/octave-value/ov-flt-cx-mat.h,
libinterp/octave-value/ov-flt-re-diag.cc,
libinterp/octave-value/ov-flt-re-diag.h,
libinterp/octave-value/ov-flt-re-mat.cc,
libinterp/octave-value/ov-flt-re-mat.h, libinterp/octave-value/ov-int16.cc,
libinterp/octave-value/ov-int32.cc, libinterp/octave-value/ov-int64.cc,
libinterp/octave-value/ov-int8.cc, libinterp/octave-value/ov-intx.h,
libinterp/octave-value/ov-java.cc, libinterp/octave-value/ov-lazy-idx.h,
libinterp/octave-value/ov-mex-fcn.cc, libinterp/octave-value/ov-mex-fcn.h,
libinterp/octave-value/ov-null-mat.cc, libinterp/octave-value/ov-null-mat.h,
libinterp/octave-value/ov-oncleanup.cc, 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-diag.cc,
libinterp/octave-value/ov-re-diag.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-str-mat.cc,
libinterp/octave-value/ov-str-mat.h, libinterp/octave-value/ov-struct.cc,
libinterp/octave-value/ov-struct.h, libinterp/octave-value/ov-type-conv.h,
libinterp/octave-value/ov-typeinfo.cc, libinterp/octave-value/ov-typeinfo.h,
libinterp/octave-value/ov-uint16.cc, libinterp/octave-value/ov-uint32.cc,
libinterp/octave-value/ov-uint64.cc, libinterp/octave-value/ov-uint8.cc,
libinterp/octave-value/ov-usr-fcn.cc, libinterp/octave-value/ov-usr-fcn.h,
libinterp/octave-value/ov.cc, libinterp/octave-value/ov.h, libinterp/octave.cc,
libinterp/operators/op-b-bm.cc, libinterp/operators/op-b-sbm.cc,
libinterp/operators/op-bm-b.cc, libinterp/operators/op-bm-bm.cc,
libinterp/operators/op-cdm-cdm.cc, libinterp/operators/op-chm.cc,
libinterp/operators/op-class.cc, libinterp/operators/op-cm-cm.cc,
libinterp/operators/op-cm-cs.cc, libinterp/operators/op-cm-s.cc,
libinterp/operators/op-cm-scm.cc, libinterp/operators/op-cm-sm.cc,
libinterp/operators/op-cs-cm.cc, libinterp/operators/op-cs-cs.cc,
libinterp/operators/op-cs-scm.cc, libinterp/operators/op-cs-sm.cc,
libinterp/operators/op-dm-dm.cc, libinterp/operators/op-dm-scm.cc,
libinterp/operators/op-double-conv.cc, libinterp/operators/op-fcdm-fcdm.cc,
libinterp/operators/op-fcm-fcm.cc, libinterp/operators/op-fcm-fcs.cc,
libinterp/operators/op-fcm-fm.cc, libinterp/operators/op-fcm-fs.cc,
libinterp/operators/op-fcs-fcm.cc, libinterp/operators/op-fcs-fcs.cc,
libinterp/operators/op-fcs-fm.cc, libinterp/operators/op-fcs-fs.cc,
libinterp/operators/op-fdm-fdm.cc, libinterp/operators/op-float-conv.cc,
libinterp/operators/op-fm-fcm.cc, libinterp/operators/op-fm-fcs.cc,
libinterp/operators/op-fm-fm.cc, libinterp/operators/op-fm-fs.cc,
libinterp/operators/op-fs-fcm.cc, libinterp/operators/op-fs-fcs.cc,
libinterp/operators/op-fs-fm.cc, libinterp/operators/op-fs-fs.cc,
libinterp/operators/op-m-cm.cc, libinterp/operators/op-m-cs.cc,
libinterp/operators/op-m-m.cc, libinterp/operators/op-m-s.cc,
libinterp/operators/op-m-scm.cc, libinterp/operators/op-m-sm.cc,
libinterp/operators/op-pm-scm.cc, libinterp/operators/op-range.cc,
libinterp/operators/op-s-cm.cc, libinterp/operators/op-s-cs.cc,
libinterp/operators/op-s-scm.cc, libinterp/operators/op-sbm-b.cc,
libinterp/operators/op-sbm-bm.cc, libinterp/operators/op-sbm-sbm.cc,
libinterp/operators/op-scm-cm.cc, libinterp/operators/op-scm-cs.cc,
libinterp/operators/op-scm-m.cc, libinterp/operators/op-scm-s.cc,
libinterp/operators/op-scm-scm.cc, libinterp/operators/op-scm-sm.cc,
libinterp/operators/op-sm-cm.cc, libinterp/operators/op-sm-m.cc,
libinterp/operators/op-sm-s.cc, libinterp/operators/op-sm-scm.cc,
libinterp/operators/op-sm-sm.cc, libinterp/operators/op-str-m.cc,
libinterp/operators/op-str-s.cc, libinterp/operators/op-str-str.cc,
libinterp/operators/ops.h, libinterp/parse-tree/lex.h,
libinterp/parse-tree/parse.h, libinterp/parse-tree/pt-arg-list.cc,
libinterp/parse-tree/pt-arg-list.h, libinterp/parse-tree/pt-assign.cc,
libinterp/parse-tree/pt-assign.h, libinterp/parse-tree/pt-binop.cc,
libinterp/parse-tree/pt-binop.h, libinterp/parse-tree/pt-bp.h,
libinterp/parse-tree/pt-cbinop.cc, libinterp/parse-tree/pt-check.cc,
libinterp/parse-tree/pt-colon.cc, libinterp/parse-tree/pt-colon.h,
libinterp/parse-tree/pt-const.cc, libinterp/parse-tree/pt-decl.cc,
libinterp/parse-tree/pt-decl.h, libinterp/parse-tree/pt-eval.cc,
libinterp/parse-tree/pt-except.h, libinterp/parse-tree/pt-exp.h,
libinterp/parse-tree/pt-fcn-handle.cc, libinterp/parse-tree/pt-id.cc,
libinterp/parse-tree/pt-id.h, libinterp/parse-tree/pt-idx.cc,
libinterp/parse-tree/pt-idx.h, libinterp/parse-tree/pt-loop.h,
libinterp/parse-tree/pt-mat.cc, libinterp/parse-tree/pt-misc.cc,
libinterp/parse-tree/pt-misc.h, libinterp/parse-tree/pt-pr-code.cc,
libinterp/parse-tree/pt-select.h, libinterp/parse-tree/pt-stmt.h,
libinterp/parse-tree/token.h, libinterp/version.cc:
Use GNU style coding conventions for code in libinterp/
author | Rik <rik@octave.org> |
---|---|
date | Mon, 28 Oct 2013 19:51:46 -0700 |
parents | d63878346099 |
children | 6a71e5030df5 60562e5c8bfb |
line wrap: on
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/* Copyright (C) 2009-2013 VZLU Prague This file is part of Octave. Octave is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. Octave is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Octave; see the file COPYING. If not, see <http://www.gnu.org/licenses/>. */ #ifdef HAVE_CONFIG_H #include <config.h> #endif #include "f77-fcn.h" #include "mx-base.h" #include "error.h" #include "defun.h" #include "parse.h" extern "C" { F77_RET_T F77_FUNC (ddot3, DDOT3) (const octave_idx_type&, const octave_idx_type&, const octave_idx_type&, const double*, const double*, double*); F77_RET_T F77_FUNC (sdot3, SDOT3) (const octave_idx_type&, const octave_idx_type&, const octave_idx_type&, const float*, const float*, float*); F77_RET_T F77_FUNC (zdotc3, ZDOTC3) (const octave_idx_type&, const octave_idx_type&, const octave_idx_type&, const Complex*, const Complex*, Complex*); F77_RET_T F77_FUNC (cdotc3, CDOTC3) (const octave_idx_type&, const octave_idx_type&, const octave_idx_type&, const FloatComplex*, const FloatComplex*, FloatComplex*); F77_RET_T F77_FUNC (dmatm3, DMATM3) (const octave_idx_type&, const octave_idx_type&, const octave_idx_type&, const octave_idx_type&, const double*, const double*, double*); F77_RET_T F77_FUNC (smatm3, SMATM3) (const octave_idx_type&, const octave_idx_type&, const octave_idx_type&, const octave_idx_type&, const float*, const float*, float*); F77_RET_T F77_FUNC (zmatm3, ZMATM3) (const octave_idx_type&, const octave_idx_type&, const octave_idx_type&, const octave_idx_type&, const Complex*, const Complex*, Complex*); F77_RET_T F77_FUNC (cmatm3, CMATM3) (const octave_idx_type&, const octave_idx_type&, const octave_idx_type&, const octave_idx_type&, const FloatComplex*, const FloatComplex*, FloatComplex*); } static void get_red_dims (const dim_vector& x, const dim_vector& y, int dim, dim_vector& z, octave_idx_type& m, octave_idx_type& n, octave_idx_type& k) { int nd = x.length (); assert (nd == y.length ()); z = dim_vector::alloc (nd); m = 1, n = 1, k = 1; for (int i = 0; i < nd; i++) { if (i < dim) { z(i) = x(i); m *= x(i); } else if (i > dim) { z(i) = x(i); n *= x(i); } else { k = x(i); z(i) = 1; } } } DEFUN (dot, args, , "-*- texinfo -*-\n\ @deftypefn {Built-in Function} {} dot (@var{x}, @var{y}, @var{dim})\n\ Compute the dot product of two vectors. If @var{x} and @var{y}\n\ are matrices, calculate the dot products along the first\n\ non-singleton dimension. If the optional argument @var{dim} is\n\ given, calculate the dot products along this dimension.\n\ \n\ This is equivalent to\n\ @code{sum (conj (@var{X}) .* @var{Y}, @var{dim})},\n\ but avoids forming a temporary array and is faster. When @var{X} and\n\ @var{Y} are column vectors, the result is equivalent to\n\ @code{@var{X}' * @var{Y}}.\n\ @seealso{cross, divergence}\n\ @end deftypefn") { octave_value retval; int nargin = args.length (); if (nargin < 2 || nargin > 3) { print_usage (); return retval; } octave_value argx = args(0), argy = args(1); if (argx.is_numeric_type () && argy.is_numeric_type ()) { dim_vector dimx = argx.dims (), dimy = argy.dims (); bool match = dimx == dimy; if (! match && nargin == 2 && dimx.is_vector () && dimy.is_vector ()) { // Change to column vectors. dimx = dimx.redim (1); argx = argx.reshape (dimx); dimy = dimy.redim (1); argy = argy.reshape (dimy); match = ! error_state; } if (match) { int dim; if (nargin == 2) dim = dimx.first_non_singleton (); else dim = args(2).int_value (true) - 1; if (error_state) ; else if (dim < 0) error ("dot: DIM must be a valid dimension"); else { octave_idx_type m, n, k; dim_vector dimz; if (argx.is_complex_type () || argy.is_complex_type ()) { if (argx.is_single_type () || argy.is_single_type ()) { FloatComplexNDArray x = argx.float_complex_array_value (); FloatComplexNDArray y = argy.float_complex_array_value (); get_red_dims (dimx, dimy, dim, dimz, m, n, k); FloatComplexNDArray z(dimz); if (! error_state) F77_XFCN (cdotc3, CDOTC3, (m, n, k, x.data (), y.data (), z.fortran_vec ())); retval = z; } else { ComplexNDArray x = argx.complex_array_value (); ComplexNDArray y = argy.complex_array_value (); get_red_dims (dimx, dimy, dim, dimz, m, n, k); ComplexNDArray z(dimz); if (! error_state) F77_XFCN (zdotc3, ZDOTC3, (m, n, k, x.data (), y.data (), z.fortran_vec ())); retval = z; } } else if (argx.is_float_type () && argy.is_float_type ()) { if (argx.is_single_type () || argy.is_single_type ()) { FloatNDArray x = argx.float_array_value (); FloatNDArray y = argy.float_array_value (); get_red_dims (dimx, dimy, dim, dimz, m, n, k); FloatNDArray z(dimz); if (! error_state) F77_XFCN (sdot3, SDOT3, (m, n, k, x.data (), y.data (), z.fortran_vec ())); retval = z; } else { NDArray x = argx.array_value (); NDArray y = argy.array_value (); get_red_dims (dimx, dimy, dim, dimz, m, n, k); NDArray z(dimz); if (! error_state) F77_XFCN (ddot3, DDOT3, (m, n, k, x.data (), y.data (), z.fortran_vec ())); retval = z; } } else { // Non-optimized evaluation. octave_value_list tmp; tmp(1) = dim + 1; tmp(0) = do_binary_op (octave_value::op_el_mul, argx, argy); if (! error_state) { tmp = feval ("sum", tmp, 1); if (! tmp.empty ()) retval = tmp(0); } } } } else error ("dot: sizes of X and Y must match"); } else error ("dot: X and Y must be numeric"); return retval; } /* %!assert (dot ([1, 2], [2, 3]), 8) %!test %! x = [2, 1; 2, 1]; %! y = [-0.5, 2; 0.5, -2]; %! assert (dot (x, y), [0 0]); %!test %! x = [1+i, 3-i; 1-i, 3-i]; %! assert (dot (x, x), [4, 20]); %!test %! x = int8 ([1 2]); %! y = int8 ([2 3]); %! assert (dot (x, y), 8); %!test %! x = int8 ([1 2; 3 4]); %! y = int8 ([5 6; 7 8]); %! assert (dot (x, y), [26 44]); %! assert (dot (x, y, 2), [17; 53]); %! assert (dot (x, y, 3), [5 12; 21 32]); */ DEFUN (blkmm, args, , "-*- texinfo -*-\n\ @deftypefn {Built-in Function} {} blkmm (@var{A}, @var{B})\n\ Compute products of matrix blocks. The blocks are given as\n\ 2-dimensional subarrays of the arrays @var{A}, @var{B}.\n\ The size of @var{A} must have the form @code{[m,k,@dots{}]} and\n\ size of @var{B} must be @code{[k,n,@dots{}]}. The result is\n\ then of size @code{[m,n,@dots{}]} and is computed as follows:\n\ \n\ @example\n\ @group\n\ for i = 1:prod (size (@var{A})(3:end))\n\ @var{C}(:,:,i) = @var{A}(:,:,i) * @var{B}(:,:,i)\n\ endfor\n\ @end group\n\ @end example\n\ @end deftypefn") { octave_value retval; int nargin = args.length (); if (nargin != 2) { print_usage (); return retval; } octave_value argx = args(0), argy = args(1); if (argx.is_numeric_type () && argy.is_numeric_type ()) { const dim_vector dimx = argx.dims (), dimy = argy.dims (); int nd = dimx.length (); octave_idx_type m = dimx(0), k = dimx(1), n = dimy(1), np = 1; bool match = dimy(0) == k && nd == dimy.length (); dim_vector dimz = dim_vector::alloc (nd); dimz(0) = m; dimz(1) = n; for (int i = 2; match && i < nd; i++) { match = match && dimx(i) == dimy(i); dimz(i) = dimx(i); np *= dimz(i); } if (match) { if (argx.is_complex_type () || argy.is_complex_type ()) { if (argx.is_single_type () || argy.is_single_type ()) { FloatComplexNDArray x = argx.float_complex_array_value (); FloatComplexNDArray y = argy.float_complex_array_value (); FloatComplexNDArray z(dimz); if (! error_state) F77_XFCN (cmatm3, CMATM3, (m, n, k, np, x.data (), y.data (), z.fortran_vec ())); retval = z; } else { ComplexNDArray x = argx.complex_array_value (); ComplexNDArray y = argy.complex_array_value (); ComplexNDArray z(dimz); if (! error_state) F77_XFCN (zmatm3, ZMATM3, (m, n, k, np, x.data (), y.data (), z.fortran_vec ())); retval = z; } } else { if (argx.is_single_type () || argy.is_single_type ()) { FloatNDArray x = argx.float_array_value (); FloatNDArray y = argy.float_array_value (); FloatNDArray z(dimz); if (! error_state) F77_XFCN (smatm3, SMATM3, (m, n, k, np, x.data (), y.data (), z.fortran_vec ())); retval = z; } else { NDArray x = argx.array_value (); NDArray y = argy.array_value (); NDArray z(dimz); if (! error_state) F77_XFCN (dmatm3, DMATM3, (m, n, k, np, x.data (), y.data (), z.fortran_vec ())); retval = z; } } } else error ("blkmm: A and B dimensions don't match: (%s) and (%s)", dimx.str ().c_str (), dimy.str ().c_str ()); } else error ("blkmm: A and B must be numeric"); return retval; } /* %!test %! x(:,:,1) = [1 2; 3 4]; %! x(:,:,2) = [1 1; 1 1]; %! z(:,:,1) = [7 10; 15 22]; %! z(:,:,2) = [2 2; 2 2]; %! assert (blkmm (x,x), z); */