How to replace the contents of a cell array

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Dubstep Dublin 2016-1-26

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/265194-how-to-replace-the-contents-of-a-cell-array

评论： Triveni 2016-1-28

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

I have a cell array of 2 columns as follows

Column1  Column2
AA       BB0p0
AA       BB0p5
AA       BB1p0
AA       BB1p5
...and so on

I would like to replace the contents of the 2nd column as follows

BB0p0 = 0
BB0p5 = 1
BB1p0 = 2
BB1p5 = 3 and so on...

I am a matlab newbie, so my apologies if any part of the question is not clear.

Thanks

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Dubstep Dublin 2016-1-26

I think it all boils down to using strrep on a cell array. Can someone please tell me how to do that?

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采纳的回答

Walter Roberson 2016-1-26

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/265194-how-to-replace-the-contents-of-a-cell-array#answer_207431

在 MATLAB Online 中打开

[unique_col2, ~, col2_idx] = unique(YourCell(:,2));
col2_idx_cell = num2cell(col2_idx - 1);   %the index is 1 based rather than 0 based
YourCell(:,2) = col2_idx_cell;

And the map back of any one stored value is unique_col2{stored_value+1}

Typically you would skip the -1 and +1 in the above and use references starting from 1, but using references starting from 0 is not wrong, and has its uses.