alibMatMul
Multiplies matrices. The PV-WAVE API for this routine is the
Matrix Multiplication Operator #.
Prototypes
void alibMatMulf( wvlong m, wvlong h, wvlong n, float *p, float *q, float *r )
void alibMatMuld( wvlong m, wvlong h, wvlong n, double *p, double *q, double *r )
void alibMatMulc( wvlong m, wvlong h, wvlong n, COMPLEX *p, COMPLEX *q, COMPLEX *r )
void alibMatMulz( wvlong m, wvlong h, wvlong n, DCOMPLEX *p, DCOMPLEX *q, DCOMPLEX *r )
Parameters
m — (Input) The first dimension of the first matrix operand.
h — (Input) The second dimension of the first matrix operand.
n — (Input) The second dimension of the second matrix operand.
*p — (Input) The (m,h) matrix operand.
*q — (Input) The (h,n) matrix operand.
*r — (Input/Output) The destination array. On return, array r contains the (m,n) matrix which results from multiplying matrices p and q.
Example
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "alib.h"
void main() { /* input and output arrays for the examples */
float f[80], f0[80], f1[80];
/* make up some data for the input arrays */
alibinit( NULL, NULL, NULL, NULL );
alibIndexf( 80, 2, 1, f0 );
alibIndexf( 80, 3, 1, f1 );
printf( "\n\n show 4-element vectors f0 and f1" );
alibPrintArrayf( 1, 1, 1, 4, f0, NULL );
alibPrintArrayf( 1, 1, 1, 4, f1, NULL );
printf( "\n\n show the inner product of vectors f0 and f1" );
alibMatMulf( 1, 4, 1, f0, f1, f );
alibPrintArrayf( 1, 1, 1, 1, f, NULL );
printf( "\n\n show 4-element vector f0 and 3-element vector f1" );
alibPrintArrayf( 1, 1, 1, 4, f0, NULL );
alibPrintArrayf( 1, 1, 1, 3, f1, NULL );
printf( "\n\n show the outer product of vectors f0 and f1" );
alibMatMulf( 4, 1, 3, f0, f1, f );
alibPrintArrayf( 1, 1, 4, 3, f, NULL );
printf( "\n\n show (4,3) matrix f0 and 3-element vector f1" );
alibPrintArrayf( 1, 1, 4, 3, f0, NULL );
alibPrintArrayf( 1, 1, 3, 1, f1, NULL );
printf( "\n\n show the result of matrix f0 times vector f1" );
alibMatMulf( 4, 3, 1, f0, f1, f );
alibPrintArrayf( 1, 1, 4, 1, f, NULL );
printf( "\n\n show (1,4) vector f0 and (4,4) matrix f1" );
alibPrintArrayf( 1, 1, 1, 4, f0, NULL );
alibPrintArrayf( 1, 1, 4, 4, f1, NULL );
printf( "\n\n show the result of covector f0 times matrix f1" );
alibMatMulf( 1, 4, 4, f0, f1, f );
alibPrintArrayf( 1, 1, 1, 4, f, NULL );
printf( "\n\n show (4,3) matrix f0 and (3,2) matrix f1" );
alibPrintArrayf( 1, 1, 4, 3, f0, NULL );
alibPrintArrayf( 1, 1, 3, 2, f1, NULL );
printf( "\n\n show the result of matrix f0 times matrix f1" );
alibMatMulf( 4, 3, 2, f0, f1, f );
alibPrintArrayf( 1, 1, 4, 2, f, NULL );
}
Output:
show 4-element vectors f0 and f1
2.000e+00 3.000e+00 4.000e+00 5.000e+00
3.000e+00 4.000e+00 5.000e+00 6.000e+00
show the inner product of vectors f0 and f1
6.800e+01
show 4-element vector f0 and 3-element vector f1
2.000e+00 3.000e+00 4.000e+00 5.000e+00
3.000e+00 4.000e+00 5.000e+00
show the outer product of vectors f0 and f1
6.000e+00 8.000e+00 1.000e+01
9.000e+00 1.200e+01 1.500e+01
1.200e+01 1.600e+01 2.000e+01
1.500e+01 2.000e+01 2.500e+01
show (4,3) matrix f0 and 3-element vector f1
2.000e+00 3.000e+00 4.000e+00
5.000e+00 6.000e+00 7.000e+00
8.000e+00 9.000e+00 1.000e+01
1.100e+01 1.200e+01 1.300e+01
3.000e+00
4.000e+00
5.000e+00
show the result of matrix f0 times vector f1
3.800e+01
7.400e+01
1.100e+02
1.460e+02
show (1,4) vector f0 and (4,4) matrix f1
2.000e+00 3.000e+00 4.000e+00 5.000e+00
3.000e+00 4.000e+00 5.000e+00 6.000e+00
7.000e+00 8.000e+00 9.000e+00 1.000e+01
1.100e+01 1.200e+01 1.300e+01 1.400e+01
1.500e+01 1.600e+01 1.700e+01 1.800e+01
show the result of covector f0 times matrix f1
1.460e+02 1.600e+02 1.740e+02 1.880e+02
show (4,3) matrix f0 and (3,2) matrix f1
2.000e+00 3.000e+00 4.000e+00
5.000e+00 6.000e+00 7.000e+00
8.000e+00 9.000e+00 1.000e+01
1.100e+01 1.200e+01 1.300e+01
3.000e+00 4.000e+00
5.000e+00 6.000e+00
7.000e+00 8.000e+00
show the result of matrix f0 times matrix f1
4.900e+01 5.800e+01
9.400e+01 1.120e+02
1.390e+02 1.660e+02
1.840e+02 2.200e+02
Version 2017.1
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