Hi <br><br>I want to multiply two sparse sequential matrices. In order to do that I think I should use MatMatMult ; however, I need the expected fill ratio which I don't know in advance. <br><br>For matrix A and matrix B I might get the nnz(A) and nnz(B) from MatGetInfo. What about nnz(C) ? <br><br>Thanks<br><br>Waad<br><a name="MatMatMult"></a><br><br><p> 
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