How to replace the 3rd column element of a matrix by comparing 1st and 2nd column of another matrix?

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suchismita
suchismita 2015-5-6
评论： suchismita 2015-5-6
I have a matrix
A =
1 2 5
1 3 5
1 4 5
1 5 6
2 3 6
2 4 7
3 4 7
3 5 7
4 5 7
and
B=
1 2 3
1 3 4
1 4 5
1 5 6
2 3 4
2 4 5
3 4 5
3 5 6
4 5 6
i want to compare 1st and 2nd column and replace the element of 3rd column of B
for example,
in A when 1st and 2nd column is
[1 2] in 3rd column its corresponding value is 5
so i want to replace B's 3rd column whenever in 1st and 2nd column are 1 2
same way when [1 3] it's value will be updated in B in same format.
please help me...
with regard
Suchismita

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Walter Roberson
Walter Roberson 2015-5-6
Have a look at ismember(V,B(:,1:2),'row')

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