find a cell array of strings in another cell array of strings
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I have two cell array of strings, say A and B. I would like to find all cells in B, in which cells of A are occurred! for example:
A={'aa';'a a';'b a'}
B={'s a';'a a';'ll';'a a';'b a';'h f'}
Here 'a a' happened twice in B, and also 'b a' happened once and 'aa' never happened. Then I would like to delete those cells, so I will have:
B={'s a';'ll';'h f'}
So, I have to consider the repetition of strings like 'a a'.
Does anyone know how to do this?
Many thanks
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Answers (2)
Guillaume
on 14 Apr 2016
ismember is the function that tells you if elements of a set are found in another set.
A = {'aa'; 'a a'; 'b a'}
B = {'s a'; 'a a'; 'll'; 'a a'; 'b a'; 'h f'}
%find which cells of A are in B
isAinB = ismember(A, B);
fprintf('''%s'' of A was found in B\n', A{isAinB});
%find which cells of B are in A and delete them
isBinA = ismember(B, A);
B(isBinA) = []
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Jos (10584)
on 14 Apr 2016
So you want the keep the elements in B that are not in A. This is known is the difference in sets, implemented in matlab like this
A = {'aa' ; 'a a' ; 'b a'}
B = {'s a' ; 'a a' ; 'll' ; 'a a' ; 'b a' ; 'h f'}
OUT = setdiff(B,A)
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