Which is the shortest way to count elements in the set of vector components?

v = [1,3,4,1,2,2,1,2,3,2,2,2,1,4]

I would like to count the twos.

I have this ugly solution:

length(v(v==2))

are there any shorter solution?

Answer 1

[Titus Edelhofer]

Hi,

slightly less ugly:

sum(v==2)

Titus

Answer 2

[Stephen23]

sum(v==2)

nnz(v==2)

[John D'Errico]

The nnz solution will tend to be slightly the fastest.

[Stephen23]

@John D'Errico: Is this generally true, or only for specific use cases?