Get lengths of nonuniform-length character strings in an array without counting padded blanks

Question

David 2013-7-2

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https://ww2.mathworks.cn/matlabcentral/answers/80859-get-lengths-of-nonuniform-length-character-strings-in-an-array-without-counting-padded-blanks

Isn't there an easy way to get the lengths of non-blank parts of character vectors placed into an array like this:

A = char('Small', 'Medium', 'Very Large')

The answer I'd like is: 5 6 10. I'd like a one or two-line solution if possible that returns a vector with the lengths of the non-blank parts of each character string in the matrix but counts blanks that fall WITHIN the character string [between words.] In the above case, the matrix A would be 3x10 but I want a function that ignores only the blanks padded onto the end of each string when the matrix is formed and I can't always get the length of the vectors before they're placed in the matrix.

David Horton

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Answer 1

Azzi Abdelmalek 2013-7-2

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https://ww2.mathworks.cn/matlabcentral/answers/80859-get-lengths-of-nonuniform-length-character-strings-in-an-array-without-counting-padded-blanks#answer_90570

在 MATLAB Online 中打开

out=cellfun(@numel,cellstr(A))

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Azzi Abdelmalek 2013-7-2

编辑：Azzi Abdelmalek 2013-7-2

在 MATLAB Online 中打开

You can also use arrayfun:

out=arrayfun(@(x) numel(strtrim(A(x,:))),1:size(A,1))

% look at strtrim function

doc strtrim

David 2013-7-2

Thanks again - very informative.

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Answer 2

Walter Roberson 2013-7-2

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https://ww2.mathworks.cn/matlabcentral/answers/80859-get-lengths-of-nonuniform-length-character-strings-in-an-array-without-counting-padded-blanks#answer_90569

在 MATLAB Online 中打开

cellfun(@(S) find(S~=' ',1,'last'), A)

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David 2013-7-2

Thanks but this doesn't work on a character array and I have tried arrayfun, which functions similarly to cellfun. Perhaps using arrayfun is a solution but I haven't figured out yet HOW to us it appropriately.

Thanks for your help anyway.

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