search for a code in a cell

Question

ankit 2015-2-18

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/179095-search-for-a-code-in-a-cell

编辑： Stephen23 2015-2-19

I want to find whether code [1 1 -1 -1] is present in a cell C in which C{1}=[1 1 1 1],C{2}=[1 1 -1 -1],C{3}=[1 -1 1 -1],C{4}=[1 -1 -1 1]. Also find out what is the location of the code.

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Answer 1

Evan 2015-2-18

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https://ww2.mathworks.cn/matlabcentral/answers/179095-search-for-a-code-in-a-cell#answer_168440

编辑：Evan 2015-2-18

在 MATLAB Online 中打开

key = [1 1 -1 -1]
C{1} = [1 1 1 1];C{2}=[1 1 -1 -1];C{3}=[1 -1 1 -1];C{4}=[1 -1 -1 1]
loc = find(cellfun(@(x)all(x == key),C));

You could also do this with a for loop, checking each cell of C one iteration at a time. cellfun effectively does this.

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ankit 2015-2-18

when i'm using strfind, there is an error showing as "If any of the input arguments are cell arrays, the first must be a cell array of strings and the second must be a character array." i'm using mat2cell([1 1 -1 -1]) and then comparing with C

Stephen23 2015-2-19

编辑：Stephen23 2015-2-19

在 MATLAB Online 中打开

strfind works on numeric arrays, and not on cell arrays containing numeric arrays. Try it with a simple numeric vectors first to see how it works. Although you have already accepted Evan's answer, this might be more what you are wanting:

cellfun(@(c)strfind(c,key), C)

Or if there might be multiple matches / non-matched entries:

cellfun(@(c)strfind(c,key), C, 'UniformOutput',false)

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