private void testAsVector(INDArray a) {
AVector v = a.asVector();
assertEquals(a.elementCount(), v.length());
assertEquals(a.elementSum(), v.elementSum(),0.00000001);
if (a.isMutable() && (v.length() > 0)) {
assertTrue(v.isMutable());
// assertTrue((a==v)||(v.isView())); not always...
} else {