i did not get the meaning of : shape(0,3), any explanation!!

Hi Asmaa,
I think it just simply means that it is an array that has three columns but without ANY data in them (not even 0). You can think of it as an empty array which has three ABSTRACT columns, not real ones. Hope this makes it easier to grasp the concept as I also had some problem trying to figure it out from a theoratical perspective.

Then should it not be a 1-D array?