Extract values by matching column values

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novice modeler
novice modeler 2017-5-10
评论： novice modeler 2017-5-11
Friends, I have two matrices, a and b. a= [ 1 2 3 ; 4 5 6] and b = [1 2 3 4 ; 4 5 6 10]. I want to extract the fourth column of matrix b by matching first three columns of a & b.
Thanks

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回答（1 个）

Andrei Bobrov
Andrei Bobrov 2017-5-11
[C,ia,ib] = setxor(a',b','rows');
out = C';

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