Revision 090c26156804c676a66583e09ef829e6a7f13719 authored by Edzer J. Pebesma on 10 February 2006, 03:12:35 UTC, committed by cran-robot on 10 February 2006, 03:12:35 UTC
1 parent e0348cd
matop.c
/**************************************************************************
**
** Copyright (C) 1993 David E. Steward & Zbigniew Leyk, all rights reserved.
**
** Meschach Library
**
** This Meschach Library is provided "as is" without any express
** or implied warranty of any kind with respect to this software.
** In particular the authors shall not be liable for any direct,
** indirect, special, incidental or consequential damages arising
** in any way from use of the software.
**
** Everyone is granted permission to copy, modify and redistribute this
** Meschach Library, provided:
** 1. All copies contain this copyright notice.
** 2. All modified copies shall carry a notice stating who
** made the last modification and the date of such modification.
** 3. No charge is made for this software or works derived from it.
** This clause shall not be construed as constraining other software
** distributed on the same medium as this software, nor is a
** distribution fee considered a charge.
**
***************************************************************************/
/* matop.c 1.3 11/25/87 */
#include <stdio.h>
#include "matrix.h"
static char rcsid[] = "$Id: matop.c,v 1.1.1.1 2003/06/23 18:31:39 cees Exp $";
/* m_add -- matrix addition -- may be in-situ */
MAT *m_add(mat1,mat2,out)
MAT *mat1,*mat2,*out;
{
u_int m,n,i;
if ( mat1==(MAT *)NULL || mat2==(MAT *)NULL )
error(E_NULL,"m_add");
if ( mat1->m != mat2->m || mat1->n != mat2->n )
error(E_SIZES,"m_add");
if ( out==(MAT *)NULL || out->m != mat1->m || out->n != mat1->n )
out = m_resize(out,mat1->m,mat1->n);
m = mat1->m; n = mat1->n;
for ( i=0; i<m; i++ )
{
__add__(mat1->me[i],mat2->me[i],out->me[i],(int)n);
/**************************************************
for ( j=0; j<n; j++ )
out->me[i][j] = mat1->me[i][j]+mat2->me[i][j];
**************************************************/
}
return (out);
}
/* m_sub -- matrix subtraction -- may be in-situ */
MAT *m_sub(mat1,mat2,out)
MAT *mat1,*mat2,*out;
{
u_int m,n,i;
if ( mat1==(MAT *)NULL || mat2==(MAT *)NULL )
error(E_NULL,"m_sub");
if ( mat1->m != mat2->m || mat1->n != mat2->n )
error(E_SIZES,"m_sub");
if ( out==(MAT *)NULL || out->m != mat1->m || out->n != mat1->n )
out = m_resize(out,mat1->m,mat1->n);
m = mat1->m; n = mat1->n;
for ( i=0; i<m; i++ )
{
__sub__(mat1->me[i],mat2->me[i],out->me[i],(int)n);
/**************************************************
for ( j=0; j<n; j++ )
out->me[i][j] = mat1->me[i][j]-mat2->me[i][j];
**************************************************/
}
return (out);
}
/* m_mlt -- matrix-matrix multiplication */
MAT *m_mlt(A,B,OUT)
MAT *A,*B,*OUT;
{
u_int i, /* j, */ k, m, n, p;
Real **A_v, **B_v /*, *B_row, *OUT_row, sum, tmp */;
if ( A==(MAT *)NULL || B==(MAT *)NULL )
error(E_NULL,"m_mlt");
if ( A->n != B->m )
error(E_SIZES,"m_mlt");
if ( A == OUT || B == OUT )
error(E_INSITU,"m_mlt");
m = A->m; n = A->n; p = B->n;
A_v = A->me; B_v = B->me;
if ( OUT==(MAT *)NULL || OUT->m != A->m || OUT->n != B->n )
OUT = m_resize(OUT,A->m,B->n);
/****************************************************************
for ( i=0; i<m; i++ )
for ( j=0; j<p; j++ )
{
sum = 0.0;
for ( k=0; k<n; k++ )
sum += A_v[i][k]*B_v[k][j];
OUT->me[i][j] = sum;
}
****************************************************************/
m_zero(OUT);
for ( i=0; i<m; i++ )
for ( k=0; k<n; k++ )
{
if ( A_v[i][k] != 0.0 )
__mltadd__(OUT->me[i],B_v[k],A_v[i][k],(int)p);
/**************************************************
B_row = B_v[k]; OUT_row = OUT->me[i];
for ( j=0; j<p; j++ )
(*OUT_row++) += tmp*(*B_row++);
**************************************************/
}
return OUT;
}
/* mmtr_mlt -- matrix-matrix transposed multiplication
-- A.B^T is returned, and stored in OUT */
MAT *mmtr_mlt(A,B,OUT)
MAT *A, *B, *OUT;
{
int i, j, limit;
/* Real *A_row, *B_row, sum; */
if ( ! A || ! B )
error(E_NULL,"mmtr_mlt");
if ( A == OUT || B == OUT )
error(E_INSITU,"mmtr_mlt");
if ( A->n != B->n )
error(E_SIZES,"mmtr_mlt");
if ( ! OUT || OUT->m != A->m || OUT->n != B->m )
OUT = m_resize(OUT,A->m,B->m);
limit = A->n;
for ( i = 0; i < A->m; i++ )
for ( j = 0; j < B->m; j++ )
{
OUT->me[i][j] = __ip__(A->me[i],B->me[j],(int)limit);
/**************************************************
sum = 0.0;
A_row = A->me[i];
B_row = B->me[j];
for ( k = 0; k < limit; k++ )
sum += (*A_row++)*(*B_row++);
OUT->me[i][j] = sum;
**************************************************/
}
return OUT;
}
/* mtrm_mlt -- matrix transposed-matrix multiplication
-- A^T.B is returned, result stored in OUT */
MAT *mtrm_mlt(A,B,OUT)
MAT *A, *B, *OUT;
{
int i, k, limit;
/* Real *B_row, *OUT_row, multiplier; */
if ( ! A || ! B )
error(E_NULL,"mmtr_mlt");
if ( A == OUT || B == OUT )
error(E_INSITU,"mtrm_mlt");
if ( A->m != B->m )
error(E_SIZES,"mmtr_mlt");
if ( ! OUT || OUT->m != A->n || OUT->n != B->n )
OUT = m_resize(OUT,A->n,B->n);
limit = B->n;
m_zero(OUT);
for ( k = 0; k < A->m; k++ )
for ( i = 0; i < A->n; i++ )
{
if ( A->me[k][i] != 0.0 )
__mltadd__(OUT->me[i],B->me[k],A->me[k][i],(int)limit);
/**************************************************
multiplier = A->me[k][i];
OUT_row = OUT->me[i];
B_row = B->me[k];
for ( j = 0; j < limit; j++ )
*(OUT_row++) += multiplier*(*B_row++);
**************************************************/
}
return OUT;
}
/* mv_mlt -- matrix-vector multiplication
-- Note: b is treated as a column vector */
VEC *mv_mlt(A,b,out)
MAT *A;
VEC *b,*out;
{
u_int i, m, n;
Real **A_v, *b_v /*, *A_row */;
/* register Real sum; */
if ( A==(MAT *)NULL || b==(VEC *)NULL )
error(E_NULL,"mv_mlt");
if ( A->n != b->dim )
error(E_SIZES,"mv_mlt");
if ( b == out )
error(E_INSITU,"mv_mlt");
if ( out == (VEC *)NULL || out->dim != A->m )
out = v_resize(out,A->m);
m = A->m; n = A->n;
A_v = A->me; b_v = b->ve;
for ( i=0; i<m; i++ )
{
/* for ( j=0; j<n; j++ )
sum += A_v[i][j]*b_v[j]; */
out->ve[i] = __ip__(A_v[i],b_v,(int)n);
/**************************************************
A_row = A_v[i]; b_v = b->ve;
for ( j=0; j<n; j++ )
sum += (*A_row++)*(*b_v++);
out->ve[i] = sum;
**************************************************/
}
return out;
}
/* sm_mlt -- scalar-matrix multiply -- may be in-situ */
MAT *sm_mlt(scalar,matrix,out)
double scalar;
MAT *matrix,*out;
{
u_int m,n,i;
if ( matrix==(MAT *)NULL )
error(E_NULL,"sm_mlt");
if ( out==(MAT *)NULL || out->m != matrix->m || out->n != matrix->n )
out = m_resize(out,matrix->m,matrix->n);
m = matrix->m; n = matrix->n;
for ( i=0; i<m; i++ )
__smlt__(matrix->me[i],(double)scalar,out->me[i],(int)n);
/**************************************************
for ( j=0; j<n; j++ )
out->me[i][j] = scalar*matrix->me[i][j];
**************************************************/
return (out);
}
/* vm_mlt -- vector-matrix multiplication
-- Note: b is treated as a row vector */
VEC *vm_mlt(A,b,out)
MAT *A;
VEC *b,*out;
{
u_int j,m,n;
/* Real sum,**A_v,*b_v; */
if ( A==(MAT *)NULL || b==(VEC *)NULL )
error(E_NULL,"vm_mlt");
if ( A->m != b->dim )
error(E_SIZES,"vm_mlt");
if ( b == out )
error(E_INSITU,"vm_mlt");
if ( out == (VEC *)NULL || out->dim != A->n )
out = v_resize(out,A->n);
m = A->m; n = A->n;
v_zero(out);
for ( j = 0; j < m; j++ )
if ( b->ve[j] != 0.0 )
__mltadd__(out->ve,A->me[j],b->ve[j],(int)n);
/**************************************************
A_v = A->me; b_v = b->ve;
for ( j=0; j<n; j++ )
{
sum = 0.0;
for ( i=0; i<m; i++ )
sum += b_v[i]*A_v[i][j];
out->ve[j] = sum;
}
**************************************************/
return out;
}
/* m_transp -- transpose matrix */
MAT *m_transp(in,out)
MAT *in, *out;
{
int i, j;
int in_situ;
Real tmp;
if ( in == (MAT *)NULL )
error(E_NULL,"m_transp");
if ( in == out && in->n != in->m )
error(E_INSITU2,"m_transp");
in_situ = ( in == out );
if ( out == (MAT *)NULL || out->m != in->n || out->n != in->m )
out = m_resize(out,in->n,in->m);
if ( ! in_situ )
for ( i = 0; i < in->m; i++ )
for ( j = 0; j < in->n; j++ )
out->me[j][i] = in->me[i][j];
else
for ( i = 1; i < in->m; i++ )
for ( j = 0; j < i; j++ )
{ tmp = in->me[i][j];
in->me[i][j] = in->me[j][i];
in->me[j][i] = tmp;
}
return out;
}
/* swap_rows -- swaps rows i and j of matrix A upto column lim */
MAT *swap_rows(A,i,j,lo,hi)
MAT *A;
int i, j, lo, hi;
{
int k;
Real **A_me, tmp;
if ( ! A )
error(E_NULL,"swap_rows");
if ( i < 0 || j < 0 || i >= A->m || j >= A->m )
error(E_SIZES,"swap_rows");
lo = max(0,lo);
hi = min(hi,A->n-1);
A_me = A->me;
for ( k = lo; k <= hi; k++ )
{
tmp = A_me[k][i];
A_me[k][i] = A_me[k][j];
A_me[k][j] = tmp;
}
return A;
}
/* swap_cols -- swap columns i and j of matrix A upto row lim */
MAT *swap_cols(A,i,j,lo,hi)
MAT *A;
int i, j, lo, hi;
{
int k;
Real **A_me, tmp;
if ( ! A )
error(E_NULL,"swap_cols");
if ( i < 0 || j < 0 || i >= A->n || j >= A->n )
error(E_SIZES,"swap_cols");
lo = max(0,lo);
hi = min(hi,A->m-1);
A_me = A->me;
for ( k = lo; k <= hi; k++ )
{
tmp = A_me[i][k];
A_me[i][k] = A_me[j][k];
A_me[j][k] = tmp;
}
return A;
}
/* ms_mltadd -- matrix-scalar multiply and add
-- may be in situ
-- returns out == A1 + s*A2 */
MAT *ms_mltadd(A1,A2,s,out)
MAT *A1, *A2, *out;
double s;
{
/* register Real *A1_e, *A2_e, *out_e; */
/* register int j; */
int i, m, n;
if ( ! A1 || ! A2 )
error(E_NULL,"ms_mltadd");
if ( A1->m != A2->m || A1->n != A2->n )
error(E_SIZES,"ms_mltadd");
if ( out != A1 && out != A2 )
out = m_resize(out,A1->m,A1->n);
if ( s == 0.0 )
return m_copy(A1,out);
if ( s == 1.0 )
return m_add(A1,A2,out);
tracecatch(out = m_copy(A1,out),"ms_mltadd");
m = A1->m; n = A1->n;
for ( i = 0; i < m; i++ )
{
__mltadd__(out->me[i],A2->me[i],s,(int)n);
/**************************************************
A1_e = A1->me[i];
A2_e = A2->me[i];
out_e = out->me[i];
for ( j = 0; j < n; j++ )
out_e[j] = A1_e[j] + s*A2_e[j];
**************************************************/
}
return out;
}
/* mv_mltadd -- matrix-vector multiply and add
-- may not be in situ
-- returns out == v1 + alpha*A*v2 */
VEC *mv_mltadd(v1,v2,A,alpha,out)
VEC *v1, *v2, *out;
MAT *A;
double alpha;
{
/* register int j; */
int i, m, n;
Real *v2_ve, *out_ve;
if ( ! v1 || ! v2 || ! A )
error(E_NULL,"mv_mltadd");
if ( out == v2 )
error(E_INSITU,"mv_mltadd");
if ( v1->dim != A->m || v2->dim != A->n )
error(E_SIZES,"mv_mltadd");
tracecatch(out = v_copy(v1,out),"mv_mltadd");
v2_ve = v2->ve; out_ve = out->ve;
m = A->m; n = A->n;
if ( alpha == 0.0 )
return out;
for ( i = 0; i < m; i++ )
{
out_ve[i] += alpha*__ip__(A->me[i],v2_ve,(int)n);
/**************************************************
A_e = A->me[i];
sum = 0.0;
for ( j = 0; j < n; j++ )
sum += A_e[j]*v2_ve[j];
out_ve[i] = v1->ve[i] + alpha*sum;
**************************************************/
}
return out;
}
/* vm_mltadd -- vector-matrix multiply and add
-- may not be in situ
-- returns out' == v1' + v2'*A */
VEC *vm_mltadd(v1,v2,A,alpha,out)
VEC *v1, *v2, *out;
MAT *A;
double alpha;
{
int /* i, */ j, m, n;
Real tmp, /* *A_e, */ *out_ve;
if ( ! v1 || ! v2 || ! A )
error(E_NULL,"vm_mltadd");
if ( v2 == out )
error(E_INSITU,"vm_mltadd");
if ( v1->dim != A->n || A->m != v2->dim )
error(E_SIZES,"vm_mltadd");
tracecatch(out = v_copy(v1,out),"vm_mltadd");
out_ve = out->ve; m = A->m; n = A->n;
for ( j = 0; j < m; j++ )
{
tmp = v2->ve[j]*alpha;
if ( tmp != 0.0 )
__mltadd__(out_ve,A->me[j],tmp,(int)n);
/**************************************************
A_e = A->me[j];
for ( i = 0; i < n; i++ )
out_ve[i] += A_e[i]*tmp;
**************************************************/
}
return out;
}
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