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[math] matrix scalar arithmetic

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Al
2015-10-16 16:26:27 -04:00
parent ade0e2dc1f
commit a2ad829d52
2 changed files with 23 additions and 3 deletions
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21
src/matrix.c
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@@ -74,10 +74,27 @@ matrix_t *matrix_new_values(size_t m, size_t n, double *values) {
return matrix; return matrix;
} }
inline void matrix_scale(matrix_t *self, double value) {
double_array_mul(self->values, self->m * self->n, value); inline void matrix_div(matrix_t *self, double value) {
double_array_div(self->values, value, self->m * self->n);
} }
inline void matrix_mul(matrix_t *self, double value) {
double_array_mul(self->values, value, self->m * self->n);
}
inline void matrix_add(matrix_t *self, double value) {
double_array_add(self->values, self->m * self->n, value);
}
inline void matrix_sub(matrix_t *self, double value) {
double_array_sub(self->values, value, self->m * self->n);
}
void matrix_dot_vector(matrix_t *self, double *vec, double *result) { void matrix_dot_vector(matrix_t *self, double *vec, double *result) {
double *values = self->values; double *values = self->values;
size_t n = self->n; size_t n = self->n;

5
src/matrix.h
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@@ -27,7 +27,10 @@ void matrix_set_scalar(matrix_t *self, size_t row_index, size_t col_index, doubl
double matrix_get(matrix_t *self, size_t row_index, size_t col_index); double matrix_get(matrix_t *self, size_t row_index, size_t col_index);
void matrix_scale(matrix_t *self, double value); void matrix_add(matrix_t *self, double value);
void matrix_sub(matrix_t *self, double value);
void matrix_mul(matrix_t *self, double value);
void matrix_div(matrix_t *self, double value);
void matrix_dot_vector(matrix_t *self, double *vec, double *result); void matrix_dot_vector(matrix_t *self, double *vec, double *result);
int matrix_dot_matrix(matrix_t *m1, matrix_t *m2, matrix_t *result); int matrix_dot_matrix(matrix_t *m1, matrix_t *m2, matrix_t *result);