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Asked by Xin CUI
on 23 Jun 2013

Hi there. My question is that I have two matrices, say, A and B, A have two columns, 1 and 2, B has two columns, 3 and 4. Columns 2 and 3 are actually same numbers, BUT with difference order. How can I merge them together? For example, column 2 of matrix A is [a b c d e f]' and column 3 of matrix B is [d c b a e f]'. All the letters are unique ones. Is there an easy way to merge A and B?

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Answer by Andrei Bobrov
on 23 Jun 2013

Accepted answer

[~,ii] = ismember(A(:,2),B(:,1)); out = [A, B(ii,2)];

## 1 Comment

## Matt J

Direct link to this comment:http://www.mathworks.com/matlabcentral/answers/79957#comment_156448

It is confusing to call the columns of B "3 and 4" if B only has two columns.