How to count matrix values in positions specified by other matrix?

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Rene Sebena
Rene Sebena 2016-6-1
评论： Rene Sebena 2016-6-1
Hi there, I am trying to solve this task, I have matrix with Experimental Conditions eg:
A =
9 10 12
11 11 15
13 14 11
and corresponding Accuracy matrix with logical values 1 (for the correct responses) and 0 (for incorrect responses), eg:
B =
0 0 1
1 0 0
1 1 1
What I need to do, is to count up the correct trials eg. for experimental conditions 11 and 12 (together), so in this case the result would be 3.
Thank you in advance.
Rene

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采纳的回答

Azzi Abdelmalek
Azzi Abdelmalek 2016-6-1
编辑：Azzi Abdelmalek 2016-6-1
out=nnz(ismember(A,[11 12]).*B)
or
out=nnz(ismember(A(logical(B)),[11 12]))

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