code: public static FloatMatrix copy(FloatMatrix x, FloatMatrix y) {
  		//NativeBlas.scopy(x.length, x.data, 0, 1, y.data, 0, 1);
  		JavaBlas.rcopy(x.length, x.data, 0, 1, y.data, 0, 1);
  		return y;
  	}
docs: Compute y <- x (copy a matrix)