Masking np. where, np.full_like

Hi @Fei_Li

Good job for spotting this mistake :+1:

Yes the m variable created in the lab is wrong (at least it does not reflect the picture you mentioned and the usual overall use; in theory you could make it work if you transpose it or transpose the dots, but itโ€™s not what usually happens).

I will submit it for fixing so that future learners would not get confused by it, thanks to you :slight_smile: