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How do I get the lengths of each entry in a cell array without using a loop

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Michael 2019-1-25

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https://ww2.mathworks.cn/matlabcentral/answers/441506-how-do-i-get-the-lengths-of-each-entry-in-a-cell-array-without-using-a-loop

评论： Michael 2019-1-25

采纳的回答： madhan ravi

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.

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madhan ravi 2019-1-25

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https://ww2.mathworks.cn/matlabcentral/answers/441506-how-do-i-get-the-lengths-of-each-entry-in-a-cell-array-without-using-a-loop#answer_358042

在 MATLAB Online 中打开

cellfun(@length,ca)

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Michael 2019-1-25

>> cellfun(@length,ca)

ans =

4 9 13

Great!. Thanks Madhan!

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MATLAB Language Fundamentals Matrices and Arrays Creating and Concatenating Matrices

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