@Test public void testInnerProduct() {
Matrix m=Matrixx.createYAxisRotationMatrix(2.0).toMatrix();
NDArray a=NDArray.wrap(m);
assertEquals(a.innerProduct(a),m.innerProduct(m));
}
@Test public void testSlice() {
Matrix22 m1=new Matrix22(1,2,3,4);
Matrix22 m2=new Matrix22(5,6,7,8);