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Topic: How to vectorize this matrix indexing
Replies: 1   Last Post: Dec 28, 2012 8:27 AM

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Jan Simon

Posts: 2,923
Registered: 10/6/08
Re: How to vectorize this matrix indexing
Posted: Dec 28, 2012 8:27 AM
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Dear Daniel,

A = rand(10,4);
b = [2 4 1 3 2 3 1 2 4 1];
r = A(sub2ind(size(A), 1:10, b));

See: http://www.mathworks.com/help/matlab/ref/sub2ind.html

Kind regards, Jan

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