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dColVector.cc
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1996-09-28
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7KB
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371 lines
// ColumnVector manipulations. -*- 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, 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <iostream.h>
#include <Complex.h>
#include "mx-base.h"
#include "mx-inlines.cc"
#include "f77-uscore.h"
#include "lo-error.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);
}
/*
* Column Vector class.
*/
#define KLUDGE_VECTORS
#define TYPE double
#define KL_VEC_TYPE ColumnVector
#include "mx-kludge.cc"
#undef KLUDGE_VECTORS
#undef TYPE
#undef KL_VEC_TYPE
int
ColumnVector::operator == (const ColumnVector& a) const
{
int len = length ();
if (len != a.length ())
return 0;
return equal (data (), a.data (), len);
}
int
ColumnVector::operator != (const ColumnVector& a) const
{
return !(*this == a);
}
ColumnVector&
ColumnVector::insert (const ColumnVector& a, int r)
{
int a_len = a.length ();
if (r < 0 || r + a_len - 1 > length ())
{
(*current_liboctave_error_handler) ("range error for insert");
return *this;
}
for (int i = 0; i < a_len; i++)
elem (r+i) = a.elem (i);
return *this;
}
ColumnVector&
ColumnVector::fill (double val)
{
int len = length ();
if (len > 0)
for (int i = 0; i < len; i++)
elem (i) = val;
return *this;
}
ColumnVector&
ColumnVector::fill (double val, int r1, int r2)
{
int len = length ();
if (r1 < 0 || r2 < 0 || r1 >= len || r2 >= len)
{
(*current_liboctave_error_handler) ("range error for fill");
return *this;
}
if (r1 > r2) { int tmp = r1; r1 = r2; r2 = tmp; }
for (int i = r1; i <= r2; i++)
elem (i) = val;
return *this;
}
ColumnVector
ColumnVector::stack (const ColumnVector& a) const
{
int len = length ();
int nr_insert = len;
ColumnVector retval (len + a.length ());
retval.insert (*this, 0);
retval.insert (a, nr_insert);
return retval;
}
RowVector
ColumnVector::transpose (void) const
{
int len = length ();
return RowVector (dup (data (), len), len);
}
ColumnVector
real (const ComplexColumnVector& a)
{
int a_len = a.length ();
ColumnVector retval;
if (a_len > 0)
retval = ColumnVector (real_dup (a.data (), a_len), a_len);
return retval;
}
ColumnVector
imag (const ComplexColumnVector& a)
{
int a_len = a.length ();
ColumnVector retval;
if (a_len > 0)
retval = ColumnVector (imag_dup (a.data (), a_len), a_len);
return retval;
}
// resize is the destructive equivalent for this one
ColumnVector
ColumnVector::extract (int r1, int r2) const
{
if (r1 > r2) { int tmp = r1; r1 = r2; r2 = tmp; }
int new_r = r2 - r1 + 1;
ColumnVector result (new_r);
for (int i = 0; i < new_r; i++)
result.elem (i) = elem (r1+i);
return result;
}
// column vector by column vector -> column vector operations
ColumnVector&
ColumnVector::operator += (const ColumnVector& 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;
}
ColumnVector&
ColumnVector::operator -= (const ColumnVector& 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;
}
// matrix by column vector -> column vector operations
ColumnVector
operator * (const Matrix& m, const ColumnVector& a)
{
int nr = m.rows ();
int nc = m.cols ();
if (nc != a.length ())
{
(*current_liboctave_error_handler)
("nonconformant matrix multiplication attempted");
return ColumnVector ();
}
if (nr == 0 || nc == 0)
return ColumnVector (0);
char trans = 'N';
int ld = nr;
double alpha = 1.0;
double beta = 0.0;
int i_one = 1;
double *y = new double [nr];
F77_FCN (dgemv) (&trans, &nr, &nc, &alpha, m.data (), &ld, a.data (),
&i_one, &beta, y, &i_one, 1L);
return ColumnVector (y, nr);
}
// diagonal matrix by column vector -> column vector operations
ColumnVector
operator * (const DiagMatrix& m, const ColumnVector& a)
{
int nr = m.rows ();
int nc = m.cols ();
int a_len = a.length ();
if (nc != a_len)
{
(*current_liboctave_error_handler)
("nonconformant matrix multiplication attempted");
return ColumnVector ();
}
if (nc == 0 || nr == 0)
return ColumnVector (0);
ColumnVector result (nr);
for (int i = 0; i < a_len; i++)
result.elem (i) = a.elem (i) * m.elem (i, i);
for (i = a_len; i < nr; i++)
result.elem (i) = 0.0;
return result;
}
// other operations
ColumnVector
map (d_d_Mapper f, const ColumnVector& a)
{
ColumnVector b (a);
b.map (f);
return b;
}
ColumnVector
map (d_c_Mapper f, const ComplexColumnVector& a)
{
int a_len = a.length ();
ColumnVector b (a_len);
for (int i = 0; i < a_len; i++)
b.elem (i) = f (a.elem (i));
return b;
}
void
ColumnVector::map (d_d_Mapper f)
{
for (int i = 0; i < length (); i++)
elem (i) = f (elem (i));
}
double
ColumnVector::min (void) const
{
int len = length ();
if (len == 0)
return 0.0;
double res = elem (0);
for (int i = 1; i < len; i++)
if (elem (i) < res)
res = elem (i);
return res;
}
double
ColumnVector::max (void) const
{
int len = length ();
if (len == 0)
return 0.0;
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 ColumnVector& a)
{
// int field_width = os.precision () + 7;
for (int i = 0; i < a.length (); i++)
os << /* setw (field_width) << */ a.elem (i) << "\n";
return os;
}
istream&
operator >> (istream& is, ColumnVector& 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;
}
}
return is;
}
/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; page-delimiter: "^/\\*" ***
;;; End: ***
*/