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+// RowVector manipulations.                              -*- 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 <iostream.h>
+
+#include <Complex.h>
+
+#include "mx-base.h"
+#include "mx-inlines.cc"
+#include "lo-error.h"
+#include "f77-uscore.h"
+
+// Fortran functions we call.
+
+extern "C"
+{
+  int F77_FCN (dgemv) (const char*, const int*, const int*,
+		       const double*, const double*, const int*,
+		       const double*, const int*, const double*,
+		       double*, const int*, long);
+
+  double F77_FCN (ddot) (const int*, const double*, const int*,
+			 const double*, const int*);
+}
+
+/*
+ * Row Vector class.
+ */
+
+#define KLUDGE_VECTORS
+#define TYPE double
+#define KL_VEC_TYPE RowVector
+#include "mx-kludge.cc"
+#undef KLUDGE_VECTORS
+#undef TYPE
+#undef KL_VEC_TYPE
+
+#if 0
+RowVector&
+RowVector::resize (int n)
+{
+  if (n < 0)
+    {
+      (*current_liboctave_error_handler)
+	("can't resize to negative dimension");
+      return *this;
+    }
+
+  double *new_data = (double *) NULL;
+  if (n > 0)
+    {
+      new_data = new double [n];
+      int min_len = len < n ? len : n;
+
+      for (int i = 0; i < min_len; i++)
+	new_data[i] = data[i];
+    }
+
+  delete [] data;
+  len = n;
+  data = new_data;
+
+  return *this;
+}
+
+RowVector&
+RowVector::resize (int n, double val)
+{
+  int old_len = len;
+  resize (n);
+  for (int i = old_len; i < len; i++)
+    data[i] = val;
+
+  return *this;
+}
+#endif
+
+int
+RowVector::operator == (const RowVector& a) const
+{
+  int len = length ();
+  if (len != a.length ())
+    return 0;
+  return equal (data (), a.data (), len);
+}
+
+int
+RowVector::operator != (const RowVector& a) const
+{
+  return !(*this == a);
+}
+
+RowVector&
+RowVector::insert (const RowVector& a, int c)
+{
+  int a_len = a.length ();
+  if (c < 0 || c + a_len - 1 > length ())
+    {
+      (*current_liboctave_error_handler) ("range error for insert");
+      return *this;
+    }
+
+  for (int i = 0; i < a_len; i++)
+    elem (c+i) = a.elem (i);
+
+  return *this;
+}
+
+RowVector&
+RowVector::fill (double val)
+{
+  int len = length ();
+  if (len > 0)
+    for (int i = 0; i < len; i++)
+      elem (i) = val;
+  return *this;
+}
+
+RowVector&
+RowVector::fill (double val, int c1, int c2)
+{
+  int len = length ();
+  if (c1 < 0 || c2 < 0 || c1 >= len || c2 >= len)
+    {
+      (*current_liboctave_error_handler) ("range error for fill");
+      return *this;
+    }
+
+  if (c1 > c2) { int tmp = c1; c1 = c2; c2 = tmp; }
+
+  for (int i = c1; i <= c2; i++)
+    elem (i) = val;
+
+  return *this;
+}
+
+RowVector
+RowVector::append (const RowVector& a) const
+{
+  int len = length ();
+  int nc_insert = len;
+  RowVector retval (len + a.length ());
+  retval.insert (*this, 0);
+  retval.insert (a, nc_insert);
+  return retval;
+}
+
+ColumnVector
+RowVector::transpose (void) const
+{
+  int len = length ();
+  return ColumnVector (dup (data (), len), len);
+}
+
+RowVector
+RowVector::extract (int c1, int c2) const
+{
+  if (c1 > c2) { int tmp = c1; c1 = c2; c2 = tmp; }
+
+  int new_c = c2 - c1 + 1;
+
+  RowVector result (new_c);
+
+  for (int i = 0; i < new_c; i++)
+    result.elem (i) = elem (c1+i);
+
+  return result;
+}
+
+// row vector by row vector -> row vector operations
+
+RowVector&
+RowVector::operator += (const RowVector& a)
+{
+  int len = length ();
+  if (len != a.length ())
+    {
+      (*current_liboctave_error_handler)
+	("nonconformant vector += operation attempted");
+      return *this;
+    }
+
+  if (len == 0)
+    return *this;
+
+  double *d = fortran_vec (); // Ensures only one reference to my privates!
+
+  add2 (d, a.data (), len);
+  return *this;
+}
+
+RowVector&
+RowVector::operator -= (const RowVector& a)
+{
+  int len = length ();
+  if (len != a.length ())
+    {
+      (*current_liboctave_error_handler)
+	("nonconformant vector -= operation attempted");
+      return *this;
+    }
+
+  if (len == 0)
+    return *this;
+
+  double *d = fortran_vec (); // Ensures only one reference to my privates!
+
+  subtract2 (d, a.data (), len);
+  return *this;
+}
+
+// row vector by scalar -> row vector operations
+
+ComplexRowVector
+operator + (const RowVector& v, const Complex& s)
+{
+  int len = v.length ();
+  return ComplexRowVector (add (v.data (), len, s), len);
+}
+
+ComplexRowVector
+operator - (const RowVector& v, const Complex& s)
+{
+  int len = v.length ();
+  return ComplexRowVector (subtract (v.data (), len, s), len);
+}
+
+ComplexRowVector
+operator * (const RowVector& v, const Complex& s)
+{
+  int len = v.length ();
+  return ComplexRowVector (multiply (v.data (), len, s), len);
+}
+
+ComplexRowVector
+operator / (const RowVector& v, const Complex& s)
+{
+  int len = v.length ();
+  return ComplexRowVector (divide (v.data (), len, s), len);
+}
+
+// scalar by row vector -> row vector operations
+
+ComplexRowVector
+operator + (const Complex& s, const RowVector& a)
+{
+  return ComplexRowVector ();
+}
+
+ComplexRowVector
+operator - (const Complex& s, const RowVector& a)
+{
+  return ComplexRowVector ();
+}
+
+ComplexRowVector
+operator * (const Complex& s, const RowVector& a)
+{
+  return ComplexRowVector ();
+}
+
+ComplexRowVector
+operator / (const Complex& s, const RowVector& a)
+{
+  return ComplexRowVector ();
+}
+
+// row vector by column vector -> scalar
+
+double
+operator * (const RowVector& v, const ColumnVector& a)
+{
+  int len = v.length ();
+  if (len != a.length ())
+    {
+      (*current_liboctave_error_handler)
+	("nonconformant vector multiplication attempted");
+      return 0.0;
+    }
+
+  int i_one = 1;
+  return F77_FCN (ddot) (&len, v.data (), &i_one, a.data (), &i_one);
+}
+
+Complex
+operator * (const RowVector& v, const ComplexColumnVector& a)
+{
+  ComplexRowVector tmp (v);
+  return tmp * a;
+}
+
+// row vector by matrix -> row vector
+
+RowVector
+operator * (const RowVector& v, const Matrix& a)
+{
+  int len = v.length ();
+  if (a.rows () != len)
+    {
+      (*current_liboctave_error_handler)
+	("nonconformant vector multiplication attempted");
+      return RowVector ();
+    }
+
+  if (len == 0 || a.cols () == 0)
+    return RowVector (0);
+
+// Transpose A to form A'*x == (x'*A)'
+
+  int a_nr = a.rows ();
+  int a_nc = a.cols ();
+
+  char trans = 'T';
+  int ld = a_nr;
+  double alpha = 1.0;
+  double beta  = 0.0;
+  int i_one = 1;
+
+  double *y = new double [len];
+
+  F77_FCN (dgemv) (&trans, &a_nc, &a_nr, &alpha, a.data (), &ld,
+		   v.data (), &i_one, &beta, y, &i_one, 1L); 
+
+  return RowVector (y, len);
+}
+
+ComplexRowVector
+operator * (const RowVector& v, const ComplexMatrix& a)
+{
+  ComplexRowVector tmp (v);
+  return tmp * a;
+}
+
+// row vector by row vector -> row vector operations
+
+ComplexRowVector
+operator + (const RowVector& v, const ComplexRowVector& a)
+{
+  int len = v.length ();
+  if (len != a.length ())
+    {
+      (*current_liboctave_error_handler)
+	("nonconformant vector addition attempted");
+      return ComplexRowVector ();
+    }
+
+  if (len == 0)
+    return ComplexRowVector (0);
+
+  return ComplexRowVector (add (v.data (), a.data (), len), len);
+}
+
+ComplexRowVector
+operator - (const RowVector& v, const ComplexRowVector& a)
+{
+  int len = v.length ();
+  if (len != a.length ())
+    {
+      (*current_liboctave_error_handler)
+	("nonconformant vector subtraction attempted");
+      return ComplexRowVector ();
+    }
+
+  if (len == 0)
+    return ComplexRowVector (0);
+
+  return ComplexRowVector (subtract (v.data (), a.data (), len), len);
+}
+
+ComplexRowVector
+product (const RowVector& v, const ComplexRowVector& a)
+{
+  int len = v.length ();
+  if (len != a.length ())
+    {
+      (*current_liboctave_error_handler)
+	("nonconformant vector product attempted");
+      return ComplexRowVector ();
+    }
+
+  if (len == 0)
+    return ComplexRowVector (0);
+
+  return ComplexRowVector (multiply (v.data (), a.data (), len), len);
+}
+
+ComplexRowVector
+quotient (const RowVector& v, const ComplexRowVector& a)
+{
+  int len = v.length ();
+  if (len != a.length ())
+    {
+      (*current_liboctave_error_handler)
+	("nonconformant vector quotient attempted");
+      return ComplexRowVector ();
+    }
+
+  if (len == 0)
+    return ComplexRowVector (0);
+
+  return ComplexRowVector (divide (v.data (), a.data (), len), len);
+}
+
+// other operations
+
+RowVector
+map (d_d_Mapper f, const RowVector& a)
+{
+  RowVector b (a);
+  b.map (f);
+  return b;
+}
+
+void
+RowVector::map (d_d_Mapper f)
+{
+  for (int i = 0; i < length (); i++)
+    elem (i) = f (elem (i));
+}
+
+double
+RowVector::min (void) const
+{
+  int len = length ();
+  if (len == 0)
+    return 0;
+
+  double res = elem (0);
+
+  for (int i = 1; i < len; i++)
+    if (elem (i) < res)
+      res = elem (i);
+
+  return res;
+}
+
+double
+RowVector::max (void) const
+{
+  int len = length ();
+  if (len == 0)
+    return 0;
+
+  double res = elem (0);
+
+  for (int i = 1; i < len; i++)
+    if (elem (i) > res)
+      res = elem (i);
+
+  return res;
+}
+
+ostream&
+operator << (ostream& os, const RowVector& a)
+{
+//  int field_width = os.precision () + 7;
+  for (int i = 0; i < a.length (); i++)
+    os << " " /* setw (field_width) */ << a.elem (i);
+  return os;
+}
+
+istream&
+operator >> (istream& is, RowVector& a)
+{
+  int len = a.length();
+
+  if (len < 1)
+    is.clear (ios::badbit);
+  else
+    {
+      double tmp;
+      for (int i = 0; i < len; i++)
+        {
+          is >> tmp;
+          if (is)
+            a.elem (i) = tmp;
+          else
+            break;
+        }
+    }
+}
+
+/*
+;;; Local Variables: ***
+;;; mode: C++ ***
+;;; page-delimiter: "^/\\*" ***
+;;; End: ***
+*/