mean value of a particular portion of a matrix

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Mohammad Golam Kibria
Mohammad Golam Kibria 2011 年 5 月 5 日
Hi, I have problem regarding matrix average.
suppose I have two matrix A and B as follows:
A =
1 2 3
3 3 6
4 6 8
4 7 7
B =
2 2 3
2 3 6
4 6 2
4 7 2
I need the mean value of A where value of B is 2. i.e mean value of the positions : (1,1) (1,2)(2,1)(3,3)(4,3)
is there any easy way to do this?

採用された回答

Andrei Bobrov
Andrei Bobrov 2011 年 5 月 5 日
variant
mean(A(B==2));

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