find if a column vector contains at least element 1

I have to check if column vector has at least element 1. Does Matlab have such similar function or I have to build it myself?

[Daniel Shub]

Do you mean isempty

[Salvatore Mazzarino]

No I mean check if in the matrix there is at least 1 as a number.

[Daniel Shub]

So do you mean any? It would help if you gave a couple of example vectors and what you expect.

Answer 1

[Sean de Wolski]

tf = any(A(:)==1)

Answer 2

[Azzi Abdelmalek]

length(a)

Or

 numel(a)

[Salvatore Mazzarino]

No I don't mean check if the matrix has at lest one element. I would know if the matrix contains at least 1. For example:

A=[1 0 0]

this contains 1.

B=[0 0 0]

this contains all zeros.

[Azzi Abdelmalek]

 any(A)