add a smaller matrix to a larger one?
z.sheng at ewi.tudelft.nl
Thu Jan 17 04:20:07 CST 2008
I have a problem, I want to add a small matrix to a larger matrix, where
the row and column indexes of the small matrix is mapped to global
indexes of the global one.
the problem comes from a kind of finite element method, however, I have
to do some operations on the small matrix, and it prevent me from
directly assembling the local entries. So I have local matrices and I
would like to add it to the global one. At this moment, I have to get
the matrix value and add it to the global matrix one by one ...
is there a better way to do it?
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