Question

Can you explain this?
It's matlab.

Answer 1

I thought it would be 0 0
0 1

Answer 2

I am not sure how you got
0 0
0 1
but in matlab, bob has shape 3 rows x 4 cols
the index 1:2:3 means start at 1 and increment by 2 until you reach (or pass) the upper limit. i.e you will get 1 and 3 , mean the first and last rows
0 0 0 1
0 0 0 1
the 1:3:5 (indices of the columns) will select 1, 4
the first column is
0
0
the fourth col is
1
1

Answer 3

Thanks so much!