/**
* Divides two matrices, this process is component by component. The result of the operation is
* stored in the first matrix.
*
* @param x The first matrix
* @param y The second matrix
*/
public double[][] fastMinus(double[][] x, double[][] y) {
int n = DoubleMatrixUtil.rows(y);
int m = DoubleMatrixUtil.columns(y);
for (int i = 0; i < n; i++) {
for (int j = 0; j < m; j++) {
x[i][j] /= y[i][j];
}
}
return x;
}
public double[][] fastInverse(double[][] x) {
int n = DoubleMatrixUtil.rows(x);
int m = DoubleMatrixUtil.columns(x);
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
x[i][j] = 1.0 / x[i][j];
}
}
return x;
}
public double[][] inverse(double[][] x) {
int n = DoubleMatrixUtil.rows(x);
int m = DoubleMatrixUtil.columns(x);
double[][] y = new double[n][m];
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
y[i][j] = 1.0 / x[i][j];
}
}
return y;
}