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assemble an identity matrix

0 votes

I would like to assemble an identity matrix to interact with others assembled matrices. Second, How can I create a diagonal matrix that has ones on specific entries, to again interact with other assembled matrices?

Thanks

asked Sep 19, 2014 by kokonet FEniCS Novice (120 points)

Hi, consider these answers 1, 2.

commented Sep 20, 2014 by MiroK FEniCS Expert (80,920 points)
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