new file mode 100644
--- /dev/null
+++ b/liboctave/chMatrix.h
@@ -0,0 +1,244 @@
+//                                  -*- C++ -*-
+/*
+
+Copyright (C) 1992, 1993, 1994, 1995 John W. Eaton
+
+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 2, 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, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+
+#if !defined (octave_cMatrix_int_h)
+#define octave_cMatrix_int_h 1
+
+#if defined (__GNUG__)
+#pragma interface
+#endif
+
+// For FILE...
+#include <cstdio>
+
+#include "MArray.h"
+
+#include "mx-defs.h"
+
+class charMatrix : public MArray2<char>
+{
+friend class ComplexMatrix;
+
+public:
+
+  charMatrix (void) : MArray2<char> () { }
+  charMatrix (int r, int c) : MArray2<char> (r, c) { }
+  charMatrix (int r, int c, char val) : MArray2<char> (r, c, val) { }
+  charMatrix (const MArray2<char>& a) : MArray2<char> (a) { }
+  charMatrix (const charMatrix& a) : MArray2<char> (a) { }
+  charMatrix (const char *s);
+
+  charMatrix& operator = (const charMatrix& a)
+    {
+      MArray2<char>::operator = (a);
+      return *this;
+    }
+
+  int operator == (const charMatrix& a) const;
+  int operator != (const charMatrix& a) const;
+
+  // destructive insert/delete/reorder operations
+
+  charMatrix& insert (const char *s, int r, int c);
+  charMatrix& insert (const charMatrix& a, int r, int c);
+
+  char *row_as_string (int r) const;
+
+#if 0
+  Matrix& insert (const RowVector& a, int r, int c);
+  Matrix& insert (const ColumnVector& a, int r, int c);
+  Matrix& insert (const DiagMatrix& a, int r, int c);
+
+  Matrix& fill (char val);
+  Matrix& fill (char val, int r1, int c1, int r2, int c2);
+
+  Matrix append (const Matrix& a) const;
+  Matrix append (const RowVector& a) const;
+  Matrix append (const ColumnVector& a) const;
+  Matrix append (const DiagMatrix& a) const;
+
+  Matrix stack (const Matrix& a) const;
+  Matrix stack (const RowVector& a) const;
+  Matrix stack (const ColumnVector& a) const;
+  Matrix stack (const DiagMatrix& a) const;
+
+  Matrix transpose (void) const;
+
+  friend Matrix real (const ComplexMatrix& a);
+  friend Matrix imag (const ComplexMatrix& a);
+
+  // resize is the destructive equivalent for this one
+
+  Matrix extract (int r1, int c1, int r2, int c2) const;
+
+  // extract row or column i.
+
+  RowVector row (int i) const;
+  RowVector row (char *s) const;
+
+  ColumnVector column (int i) const;
+  ColumnVector column (char *s) const;
+
+  Matrix inverse (void) const;
+  Matrix inverse (int& info) const;
+  Matrix inverse (int& info, double& rcond) const;
+
+  Matrix pseudo_inverse (double tol = 0.0);
+
+  ComplexMatrix fourier (void) const;
+  ComplexMatrix ifourier (void) const;
+
+  ComplexMatrix fourier2d (void) const;
+  ComplexMatrix ifourier2d (void) const;
+
+  DET determinant (void) const;
+  DET determinant (int& info) const;
+  DET determinant (int& info, double& rcond) const;
+
+  Matrix solve (const Matrix& b) const;
+  Matrix solve (const Matrix& b, int& info) const;
+  Matrix solve (const Matrix& b, int& info, double& rcond) const;
+
+  ComplexMatrix solve (const ComplexMatrix& b) const;
+  ComplexMatrix solve (const ComplexMatrix& b, int& info) const;
+  ComplexMatrix solve (const ComplexMatrix& b, int& info, double& rcond) const;
+
+  ColumnVector solve (const ColumnVector& b) const;
+  ColumnVector solve (const ColumnVector& b, int& info) const;
+  ColumnVector solve (const ColumnVector& b, int& info, double& rcond) const;
+
+  ComplexColumnVector solve (const ComplexColumnVector& b) const;
+  ComplexColumnVector solve (const ComplexColumnVector& b, int& info) const;
+  ComplexColumnVector solve (const ComplexColumnVector& b, int& info,
+			     double& rcond) const;
+
+  Matrix lssolve (const Matrix& b) const;
+  Matrix lssolve (const Matrix& b, int& info) const;
+  Matrix lssolve (const Matrix& b, int& info, int& rank) const;
+
+  ComplexMatrix lssolve (const ComplexMatrix& b) const;
+  ComplexMatrix lssolve (const ComplexMatrix& b, int& info) const;
+  ComplexMatrix lssolve (const ComplexMatrix& b, int& info,
+			 int& rank) const;
+
+  ColumnVector lssolve (const ColumnVector& b) const;
+  ColumnVector lssolve (const ColumnVector& b, int& info) const;
+  ColumnVector lssolve (const ColumnVector& b, int& info, int& rank) const;
+
+  ComplexColumnVector lssolve (const ComplexColumnVector& b) const;
+  ComplexColumnVector lssolve (const ComplexColumnVector& b, int& info) const;
+  ComplexColumnVector lssolve (const ComplexColumnVector& b, int& info,
+			       int& rank) const;
+
+  Matrix& operator += (const Matrix& a);
+  Matrix& operator -= (const Matrix& a);
+
+  Matrix& operator += (const DiagMatrix& a);
+  Matrix& operator -= (const DiagMatrix& a);
+
+  // unary operations
+
+  Matrix operator ! (void) const;
+
+  // column vector by row vector -> matrix operations
+
+  friend Matrix operator * (const ColumnVector& a, const RowVector& a);
+
+  // diagonal matrix by scalar -> matrix operations
+
+  friend Matrix operator + (const DiagMatrix& a, double s);
+  friend Matrix operator - (const DiagMatrix& a, double s);
+
+  // scalar by diagonal matrix -> matrix operations
+
+  friend Matrix operator + (double s, const DiagMatrix& a);
+  friend Matrix operator - (double s, const DiagMatrix& a);
+
+  // matrix by diagonal matrix -> matrix operations
+
+  friend Matrix operator + (const Matrix& a, const DiagMatrix& b);
+  friend Matrix operator - (const Matrix& a, const DiagMatrix& b);
+  friend Matrix operator * (const Matrix& a, const DiagMatrix& b);
+
+  // diagonal matrix by matrix -> matrix operations
+
+  friend Matrix operator + (const DiagMatrix& a, const Matrix& b);
+  friend Matrix operator - (const DiagMatrix& a, const Matrix& b);
+  friend Matrix operator * (const DiagMatrix& a, const Matrix& b);
+
+  // matrix by matrix -> matrix operations
+
+  friend Matrix operator * (const Matrix& a, const Matrix& b);
+
+  // other operations
+
+  friend Matrix map (d_d_Mapper f, const Matrix& a);
+  friend Matrix map (d_c_Mapper f, const ComplexMatrix& a);
+  void map (d_d_Mapper f);
+
+  Matrix all (void) const;
+  Matrix any (void) const;
+
+  Matrix cumprod (void) const;
+  Matrix cumsum (void) const;
+  Matrix prod (void) const;
+  Matrix sum (void) const;
+  Matrix sumsq (void) const;
+
+  ColumnVector diag (void) const;
+  ColumnVector diag (int k) const;
+
+  ColumnVector row_min (void) const;
+  ColumnVector row_min_loc (void) const;
+
+  ColumnVector row_max (void) const;
+  ColumnVector row_max_loc (void) const;
+
+  RowVector column_min (void) const;
+  RowVector column_min_loc (void) const;
+
+  RowVector column_max (void) const;
+  RowVector column_max_loc (void) const;
+
+  // i/o
+
+  friend ostream& operator << (ostream& os, const Matrix& a);
+  friend istream& operator >> (istream& is, Matrix& a);
+
+  int read (FILE *fptr, const char *type);
+  int write (FILE *fptr, const char *type);
+#endif
+
+private:
+
+  charMatrix (char *ch, int r, int c) : MArray2<char> (ch, r, c) { }
+};
+
+#endif
+
+/*
+;;; Local Variables: ***
+;;; mode: C++ ***
+;;; page-delimiter: "^/\\*" ***
+;;; End: ***
+*/