/**
* @param A
* @param B
* @return
*/
public static float dot(Matrix A, Matrix B) {
int aLen = A.m * A.n;
int bLen = B.m * B.n;
try {
if (bLen != aLen) throw new Matrix.WrongDimensionsException();
} catch (Matrix.WrongDimensionsException e) {
e.printStackTrace();
System.exit(1);
}
float[] dotP = new float[1];
Level1.sdot(aLen, dotP, A.getData(), B.getData());
return dotP[0];
}
public static float[] add(final float[] a, final float[] b) {
Level1.saxpy(a.length, 1f, a, b);
return b;
}
/**
* @param M
* @param alpha
* @return
*/
public static Matrix scale(Matrix M, float alpha) {
float[] scaled = M.getData().clone();
Level1.sscal(scaled.length, alpha, scaled);
return new Matrix(scaled, M.m, M.n);
}
