How to access an cell array using an cell array of indices

Question

shelley 2017-4-28

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https://ww2.mathworks.cn/matlabcentral/answers/337904-how-to-access-an-cell-array-using-an-cell-array-of-indices

回答： shelley 2017-5-1

Hello All, Suppose we have cell arrays as A={[1 2 3],[4 5 6 7 8],[9 10 11 12]} B={[1:2],[2:4],[1:3]} How can I access A using B as indices, namely, extracting the first cell of A, A{1} using the index number from B{1}, etc. Therefore the output will be {[1 2],[5 6 7],[9 10 11]}

I greatly appreciate your input!!

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Answer 1

Stephen23 2017-4-29

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https://ww2.mathworks.cn/matlabcentral/answers/337904-how-to-access-an-cell-array-using-an-cell-array-of-indices#answer_265023

在 MATLAB Online 中打开

Using cellfun (not faster, just more compact):

>> A = {[1,2,3],[4,5,6,7,8],[9,10,11,12]};
>> B = {1:2,2:4,1:3};
>> C = cellfun(@(a,b)a(b),A,B,'uni',0);
>> C{:}
ans =
     1     2
ans =
     5     6     7
ans =
     9    10    11