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@@ -0,0 +1,91 @@
+//                                        -*- C++ -*-
+/*
+
+Copyright (C) 1992, 1993, 1994 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, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#if defined (__GNUG__)
+#pragma implementation
+#endif
+
+#include "dbleAEPBAL.h"
+#include "f77-uscore.h"
+
+extern "C"
+{
+  int F77_FCN (dgebal) (const char*, const int*, double*,
+                        const int*, int*, int*, double*,
+                        int*, long, long);
+
+  int F77_FCN (dgebak) (const char*, const char*, const int*, const int*,
+			const int*, double*, const int*, double*, const int*,
+			int*, long, long);
+}
+
+int
+AEPBALANCE::init (const Matrix& a, const char *balance_job)
+{
+  int a_nc = a.cols ();
+  if (a.rows () != a_nc)
+    {
+      (*current_liboctave_error_handler) ("AEPBALANCE requires square matrix");
+      return -1;
+    }
+
+  int n = a_nc;
+
+// Parameters for balance call.
+
+  int info;
+  int ilo;
+  int ihi;
+  double *scale = new double [n];
+
+// Copy matrix into local structure.
+
+  balanced_mat = a;
+
+  F77_FCN (dgebal) (balance_job, &n, balanced_mat.fortran_vec (), 
+		    &n, &ilo, &ihi, scale, &info, 1L, 1L);
+
+// Initialize balancing matrix to identity.
+
+  balancing_mat = Matrix (n, n, 0.0);
+  for (int i = 0; i < n; i++)
+    balancing_mat.elem (i ,i) = 1.0;
+
+  F77_FCN (dgebak) (balance_job, "R", &n, &ilo, &ihi, scale, &n, 
+		    balancing_mat.fortran_vec (), &n, &info, 1L, 1L);
+
+  delete [] scale;
+
+  return info;
+}
+
+/*
+;;; Local Variables: ***
+;;; mode: C++ ***
+;;; page-delimiter: "^/\\*" ***
+;;; End: ***
+*/