new file mode 100644
--- /dev/null
+++ b/src/DLD-FUNCTIONS/colloc.cc
@@ -0,0 +1,141 @@
+/*
+
+Copyright (C) 1996, 1997 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.
+
+*/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <string>
+
+#include "CollocWt.h"
+#include "lo-mappers.h"
+
+#include "defun-dld.h"
+#include "error.h"
+#include "help.h"
+#include "oct-obj.h"
+#include "utils.h"
+
+DEFUN_DLD (colloc, args, ,
+  "[R, A, B, Q] = colloc (N [, \"left\"] [, \"right\"]): collocation weights")
+{
+  octave_value_list retval;
+
+  int nargin = args.length ();
+
+  if (nargin < 1 || nargin > 3)
+    {
+      print_usage ("colloc");
+      return retval;
+    }
+
+  if (! args(0).is_scalar_type ())
+    {
+      error ("colloc: first argument must be a scalar");
+      return retval;
+    }
+
+  double tmp = args(0).double_value ();
+
+  if (error_state)
+    return retval;
+
+  if (xisnan (tmp))
+    {
+      error ("colloc: NaN is invalid as NCOL");
+      return retval;
+    }
+
+  int ncol = NINT (tmp);
+  if (ncol < 0)
+    {
+      error ("colloc: first argument must be non-negative");
+      return retval;
+    }
+
+  int ntot = ncol;
+  int left = 0;
+  int right = 0;
+
+  for (int i = 1; i < nargin; i++)
+    {
+      if (args(i).is_defined ())
+	{
+	  if (! args(i).is_string ())
+	    {
+	      error ("colloc: expecting string argument");
+	      return retval;
+	    }
+
+	  string s = args(i).string_value ();
+
+	  if ((s.length () == 1 && (s[0] == 'R' || s[0] == 'r'))
+	      || s == "right")
+	    {
+	      right = 1;
+	    }
+	  else if ((s.length () == 1 && (s[0] == 'L' || s[0] == 'l'))
+		   || s == "left")
+	    {
+	      left = 1;
+	    }
+	  else
+	    {
+	      error ("colloc: unrecognized argument");
+	      return retval;
+	    }
+	}
+      else
+	{
+	  error ("colloc: unexpected empty argument");
+	  return retval;
+	}
+    }
+
+  ntot += left + right;
+  if (ntot < 1)
+    {
+      error ("colloc: the total number of roots must be positive");
+      return retval;
+    }
+  
+  CollocWt wts (ncol, left, right);
+
+  ColumnVector r = wts.roots ();
+  Matrix A = wts.first ();
+  Matrix B = wts.second ();
+  ColumnVector q = wts.quad_weights ();
+
+  retval(3) = q;
+  retval(2) = B;
+  retval(1) = A;
+  retval(0) = r;
+
+  return retval;
+}
+
+/*
+;;; Local Variables: ***
+;;; mode: C++ ***
+;;; End: ***
+*/
+