Finding total count of values in a cell array?

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Jason 2011-8-13

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采纳的回答： Fangjun Jiang

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I have a 4-D cell array, and there are empty arrays '[]' within it. How do I find the total number of the empty arrays?

This is what I tried.

% A is 4-D cell array
cnt = 0;
for a = 1:1:(size(A, 1))
    for b = 1:1:(size(A, 2))
        for c = 1:1:(size(A, 3))
            for d = 1:1:(size(A, 4))
                if A(a, b, c, d) == [] 
                    then cnt = cnt + 1;
                end
            end
        end
    end
end

Error: Undefined function or method 'eq' for input arguments of type 'cell'.

Someone please help me? Thanks.

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Fangjun Jiang 2011-8-13

First, to reference the content of a cell array, you need to use {}, not ()

To check if the content is empty, use isempty(), not to use ==[]

Jason 2011-8-13

Yes, I made a mistake, it should be A{a, b, c, d} - curly brackets, secondly, I learnt something new - the use of isempty. Thanks again.

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采纳的回答

Fangjun Jiang 2011-8-13

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https://ww2.mathworks.cn/matlabcentral/answers/13626-finding-total-count-of-values-in-a-cell-array#answer_18611

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cnt=cellfun('isempty',A);
cnt=sum(cnt(:));

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Jason 2011-8-13

Thanks!

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