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Maximum by row or column

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@ducloyer wrote:

Hello
(Sorry for my poor english)
For a post-treatement of finit element model, I need a function to get the maximum and minimum for a selection of values.
I have a matrix A (dimensions n*n) that define the differents selections (0 value not to be considered, 1 value to be considered), and a matrix B (dimensions 1*n) with the complete list of value.
I think there is to way to solve my problem.
1* : create a copy of the function multiply which give the maximum instead of the sum ( Cij=max(Aik*Bkj) instead of Cij=sum(Aik*Bkj) )
2* : a function that give the maximum (or minimum) by row or column for a given matrix

I work with VisualStudio Express 2013 under Windows7Pro 64bit. I have installed MathNet using NuGet packages manager.
I'd like to try creating this function using copy of existing functions (multiply or maximum), but I never open the source code of mathnet.numerics before, I even don't know where to find it.

Best regards

Xavier Ducloyer

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