
From:  Umut Tabak 
Subject:  [Getfemusers] submatrix addressing and assignment of this to a csr matrix 
Date:  Tue, 03 May 2011 16:44:55 +0200 
Useragent:  Mozilla/5.0 (X11; U; Linux x86_64; enUS; rv:1.9.1.16) Gecko/20101226 Icedove/3.0.11 
Dear all,I was using ublas for some matrix interfacing operations however they lack an efficient addressing scheme for a submatrix. Since gmm++ is designed to be used in a FE framework, I thought that it could give me what I like.
Here is my goal: I would like assign to some sparse matrices which I have the structure, the nnz info for rows or so, I also read the documentation and sub_index seems to be the answer and later on sub_matrix returns a reference to a matrix.
So the questions are+ what would be the most efficient way to assign this matrix(or the reference) to a csr or csc matrix? + what would be the most efficient way to iterate over the nnz of this newly generated matrix?
Best wishes, Umut
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