How can I return cell array values using an index matrix.

Question

Aaron Jean-Baptiste 2017-10-1

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https://ww2.mathworks.cn/matlabcentral/answers/359244-how-can-i-return-cell-array-values-using-an-index-matrix

评论： Walter Roberson 2017-10-2

采纳的回答： Walter Roberson

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Hi there,

I have the following variables:

variableNames = {'Aaron', 'Brett', 'Charlie', 'Katie', 'Jess'}
index_matrix = [1,3,4,5,2; 2,1,4,5,3; 3,2,1,5,4]

and I want to return the variableName corresponding to that index in a new cell array or timetable:

index_name = {'Aaron','Charlie','Katie','Jess','Brett'; 
              'Brett','Aaron','Katie','Jess','Charlie'; 
              'Charlie','Brett','Aaron','Jess','Katie'}

My index_matrix is actually in a timetable, but I suppose once I have a solution for this I can adjust it.

Many thanks,

Aaron

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Answer 1

Walter Roberson 2017-10-1

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https://ww2.mathworks.cn/matlabcentral/answers/359244-how-can-i-return-cell-array-values-using-an-index-matrix#answer_283882

在 MATLAB Online 中打开

index_name = variableNames(index_matrix);

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Aaron Jean-Baptiste 2017-10-2

That was embarrassingly easy. I suppose a follow-up is that I want to store this cell array as a time-series. I.e. I want to see on what date did 'Aaron' come first. How can I store the data in this ordered format?