MATLAB: How to get the lengths of each entry in a cell array without using a loop

Question

How can I generate a vector with one entry for the length of each vector in a cell array without using a loop. e.g.

>> ca={1:4,1:9,3:15}

ca =

1×3 cell array

{1×4 double} {1×9 double} {1×13 double}

I want a vector with [4 9 13]

Obviously I could do :

>> for i=1:length(ca);lca(i)=length(ca{i});end

>> lca

lca =

4 9 13

But I have an aversion to using a loop for something like this.

Answer 1

cellfun(@length,ca)