Finding row entries that are not equal?

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Andrew Miller
Andrew Miller le 4 Juin 2020
Commenté : Andrew Miller le 4 Juin 2020
Hello everyone,
I have a matrix and I would like to find all of the rows such that the entry in the first column does not match the entry of the second column.
Background: I am running some finite element code. I am finding all entries of the stiffness matrix that are positive, but in particular I want to find the stiffness matrix off-diagonal entries that are positive.
Thank you in advanced!
Andrew

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madhan ravi
madhan ravi le 4 Juin 2020
matrix(:,1) ~= matrix(:,2)
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Andrew Miller
Andrew Miller le 4 Juin 2020
Thank you. If I set this to a l=matrix(:,1) ~= matrix(:,2), then I can find(l==1) will give back the entries desired.
Thanks!

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