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3D matrix manipulation. FInd values of given positions

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André Sousa
André Sousa 8 May 2014
답변: lvn 8 May 2014
Hi there. Pls help me resolve an issue I cant find a solution for: I have a two 3D matrixes with the same dimentions( 288*288*80)off nii files. I want to search for nonzero positions on the first matrix and use thoses positions to go through the second matrix, and do a sum of the values located on those positions . How can I do it? Regards

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SkyRazor 8 May 2014
I think the page as follows will help you.
Try the functions nonzeros, find and sum to slove your problem.

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lvn 8 May 2014
This should do it:

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