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-rw-r--r--src/matrix.c77
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-/**
- * @file matrix.c
- * @author Gertjan van den Burg (burg@ese.eur.nl)
- * @date August 8, 2013
- * @brief Functions facilitating matrix access
- *
- * @details
- * The functions contained in this file are used when
- * accessing or writing to matrices. Seperate functions
- * exist of adding and multiplying existing matrix
- * elements, to ensure this is done in place.
- *
- */
-
-#include "matrix.h"
-#include "util.h"
-
-/**
- * @name matrix_set
- * @brief Set element of matrix
- * @ingroup matrix
- *
- * Row-Major order is used to set a matrix element. Since matrices
- * of type double are most common in MSVMMaj, this function only
- * deals with that type.
- *
- * @param [in] M matrix to set element of
- * @param [in] cols number of columns of M
- * @param [in] i row index of element to write to
- * @param [in] j column index of element to write to
- * @param [out] val value to write to specified element of M
- */
-void matrix_set(double *M, long cols, long i, long j, double val)
-{
- M[i*cols+j] = val;
-}
-
-double matrix_get(double *M, long cols, long i, long j)
-{
- return M[i*cols+j];
-}
-
-void matrix_add(double *M, long cols, long i, long j, double val)
-{
- M[i*cols+j] += val;
-}
-
-void matrix_mul(double *M, long cols, long i, long j, double val)
-{
- M[i*cols+j] *= val;
-}
-
-void matrix3_set(double *M, long N2, long N3, long i, long j,
- long k, double val)
-{
- M[k+N3*(j+N2*i)] = val;
-}
-
-double matrix3_get(double *M, long N2, long N3, long i, long j,
- long k)
-{
- return M[k+N3*(j+N2*i)];
-}
-
-
-void print_matrix(double *M, long rows, long cols)
-{
- long i, j;
-
- for (i=0; i<rows; i++) {
- for (j=0; j<cols; j++)
- note("%8.8f ", matrix_get(M, cols, i, j));
- note("\n");
- }
- note("\n");
-}
-