Generating a vector containing the sizes of all cells of a cell array, along a specific dimension

Is there a way to vectorize this? (I tried with "cellfun", but did not succeed).

for i = 1:numel(a)
    s(i) = size(a{i}, 1);
end

Where a sample of "a" is provided in attachment.

[the cyclist]

It would be much easier to help if you posted code that actually creates a small example of a, rather than pseudocode that illustrates what you mean.

Is

AGA
AGA

meant to represent a 2x3 character array? So, is it correct that

a{1,1} = ['AGA';'AGA'];

would be an example of one element? It seems like that's what you mean, but wanted to be sure.

[Paolo Binetti]

Sorry, I just uploaded a .mat file with "a"

Answer 1

[the cyclist]

Does this give what you want?

s = cellfun(@(x)size(x,1),a);

[Paolo Binetti]

Yes, I see the syntax now, thank you.

Answer 2

[Jan]

cellfun has some builtin-functions, which are provided as strings and much faster than using anomyous functions:

s = cellfun('size', a, 1)

Unfortunately they appear in the docs as "Backward compatibility" only, but they are jewels.

[Paolo Binetti]

Thank you, it also works, and is indeed faster.