How to find all combinations of 3 of matrices but get the results named

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Avishka Karunaratne 2016-2-14

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关闭： MATLAB Answer Bot 2021-8-20

I have 1X1 matrices A = 2, B= 4 , C5 =10 , D=2 etc , basically 40 of such matrices, (I dont mind combining them into one matrix) I want every possible combination of 3 but a way to know which matrices made up each matrix.

for e.g if i get the combination 2 4 10 , I want to know that it came from D, B and C

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Answer 1

Star Strider 2016-2-14

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https://ww2.mathworks.cn/matlabcentral/answers/268073-how-to-find-all-combinations-of-3-of-matrices-but-get-the-results-named#answer_209780

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One possibility:

VblNames = {'A' 'B' 'C5' 'D'};
VblVals  = {2, 4, 10, 2};
idx = nchoosek(1:size(VblNames,2), 3);
Out = {VblNames(idx); VblVals(idx)};
Out{:}
ans = 
      'A'    'B'     'C5'
      'A'    'B'     'D' 
      'A'    'C5'    'D' 
      'B'    'C5'    'D' 
ans = 
      [2]    [ 4]    [10]
      [2]    [ 4]    [ 2]
      [2]    [10]    [ 2]
      [4]    [10]    [ 2]