MATLAB: Match row and column

MATLABrow

I have one matrix
a=
1 3 0
2 5 0
3 7 0
4 8 0
5 10 0
and another is
b=
5 10
3 7
I want to do find(a(:,1)=b(:,1) & a(:,2)==b(:,2) so that
5 10 0
3 7 0

Best Answer

You can use ismember to generate the logical indices. In the same order as a:
>> idx = ismember(a(:,1:2),b,'rows');
>> a(idx,:)
ans =
    3    7    0
    5   10    0
Or in the same order as b:
>> [~,idx] = ismember(b,a(:,1:2),'rows');
>> a(idx,:)
ans =
    5   10    0
    3    7    0
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