--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/DLD-FUNCTIONS/rcond.cc	Wed May 14 18:09:56 2008 +0200
@@ -0,0 +1,70 @@
+/*
+
+Copyright (C) 2008 David Bateman
+
+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 "defun-dld.h"
+#include "error.h"
+#include "gripes.h"
+#include "oct-obj.h"
+#include "utils.h"
+
+DEFUN_DLD (rcond, args, ,
+  "-*- texinfo -*-\n\
+@deftypefn {Loadable Function} {@var{c} =} rcond (@var{a})\n\
+Compute the 1-norm estimate of the reciprocal condition as returned\n\
+by LAPACK. If the matrix is well-conditioned then @var{c} will be near\n\
+1 and if the matrix is poorly conditioned it will be close to zero.\n\
+\n\
+The matrix @var{a} must not be sparse. If the matrix is sparse then\n\
+@code{condest (@var{a})} or @code{rcond (full (@var{a}))} should be used\n\
+instead.\n\
+@seealso{inv, mldivide}\n\
+@end deftypefn")
+{
+  octave_value retval;
+
+  int nargin = args.length ();
+
+  if (nargin != 1)
+    print_usage ();
+  else if (args(0).is_sparse_type ())
+    error ("rcond: for sparse matrices use 'rcond (full (a))' or 'condest (a)' instead");
+  else if (args(0).is_complex_type ())
+    {
+      ComplexMatrix m = args(0).complex_matrix_value ();
+      MatrixType mattyp;
+      retval = m.rcond (mattyp);
+      args(0).matrix_type (mattyp);
+    }
+  else
+    {
+      Matrix m = args(0).matrix_value ();
+      MatrixType mattyp;
+      retval = m.rcond (mattyp);
+      args(0).matrix_type (mattyp);
+    }
+
+  return retval;
+}