How to check ismember in a cell in Matlab?

Question

SM 2019-10-24

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https://ww2.mathworks.cn/matlabcentral/answers/487146-how-to-check-ismember-in-a-cell-in-matlab

回答： SM 2019-10-24

List={[5,2]	[27,19]	[13,8]	[17,14]	[3,13]	[21,20]	[6,16]	[4,30]	[1,13]	[20,2]	[14,27];
      [5,2]	[21,7]	[29,6]	[17,36]	[35,12]	[8,20]	[35,8]	[11,10]	[35,23]	[22,25]	[9,32]};
B={[21 20]};
A=ismember(List{1,:}, B)   % it will only check the row of the cell List.
result=[0 0 0 0 0 1 0 0 0 0 0]

is it possible?

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Answer 1

Stephen23 2019-10-24

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https://ww2.mathworks.cn/matlabcentral/answers/487146-how-to-check-ismember-in-a-cell-in-matlab#answer_398010

在 MATLAB Online 中打开

>> List = {[4,5,2],[27,19],[13,8],[17,14],[3,13],[21,20],[6,16],[4,30],[1,13],[20,2],[14,27,2];[5,2],[21,7],[29,6],[17,36],[35,12],[8,20],[35,8],[11,10],[35,23],[22,25],[9,32]};
>> B = {[21,20]}; % why the superfluous cell array?
>> X = cellfun(@(m)isequal(m,B{1}),List(1,:))
X =
  0  0  0  0  0  1  0  0  0  0  0

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Answer 2

Andrei Bobrov 2019-10-24

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https://ww2.mathworks.cn/matlabcentral/answers/487146-how-to-check-ismember-in-a-cell-in-matlab#answer_398004

在 MATLAB Online 中打开

result = cellfun(@(x)all(x == B{:}),List);

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SM 2019-10-24

Excellent! But It must be only check the first row. Another issue is that if the first row is replaced by [4, 5,2] [27,19] [13,8] [17,14] [3,13] [21,20] [6,16] [4,30] [1,13] [20,2] [14,27,2]; then it shows error 'Matrix dimensions must agree'. Is it possible to solve now?

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