using strcmp on nested cell array (cell array within a cell array)

Question

ChiPhi85 2019-1-24

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评论： ChiPhi85 2019-1-25

I need to retrieve the index of a string within a cell array where some cells are strings and others are cell arrays of different sizes. For example the first 5 rows might look like this:

    {1×2 cell}
    {'Text1' }
    {1×2 cell}
    {'Text2' }
    {1×5 cell}

How do I retrieve the row index when the string might be contained with the cell arrays? I'd like to do this without a loop and I'm sure there's a way but I can't figure it out and can't seem to find an answer anywhere. I've tried cellfun which works if I was searching for 'Text1' for example.

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Answer 1

Guillaume 2019-1-24

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在 MATLAB Online 中打开

I'm not entirely clear if you want to look inside the inner cell arrays or not.

If not:

lookup = 'something';
rows = find(cellfun(@(c) ischar(c) && strcmp(c, lookup), yourcellarray))  %the && is essential to ensure that strcmp is only called when the content of the cell is a char vector

If you want to look insie the inner cell arrays and only care about knowing which rows of the outer cell array may contain your search:

lookup = 'something';
rows = find(cellfun(@(c) any(strcmp(c, lookup)), yourcellarray))

Note that this assumes that the inner cells all contain char vectors.

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ChiPhi85 2019-1-25

I did want to look inside the cell arrays and I was missing the any function - thanks

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Answer 2

Kevin Phung 2019-1-24

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https://ww2.mathworks.cn/matlabcentral/answers/441366-using-strcmp-on-nested-cell-array-cell-array-within-a-cell-array#answer_357922

编辑：Kevin Phung 2019-1-24

在 MATLAB Online 中打开

if a is your cell array:

myText ='Text1';
idx = find(cellfun(@ischar,a)) %returns those indices where cell is a chr array
idx = idx(find(strcmp(a(cellfun(@ischar,a)),myText)))