MATLAB: How to count a specific value from column to column

Question

Hey

Maybe a simple question. But if I have a vector lets say 15×1 vector like:

[1 1 1 0 1 0 0 1 0 0 1 0 1 0 1]

Now I want to count the number 1 in range of 5 columns so I get a new vector:

[4 1 3]

Anyway to do that?

Answer 1

a=[1 1 1 0 1 0 0 1 0 0 1 0 1 0 1];
Result=sum(reshape(a',5,[]))

Gives:

Result =
     4     1     3