Use 1.0 for dense matrices; it is ignored since dense matrices are always dense.
Barry On Sun, 18 Feb 2007, Manav Bhatia wrote: > Hi, > > I am performing a matrix multiplication of two dense matrices with both > MatMatMult and MatMatMultTranspose. > What do I choose a fill factor as? According to the definition in the > documentation: fiill = expected fill as ratio of nnz(C)/(nnz(A) + nnz(B)). > So, If I have two full matrices A and B, I will get a full matrix as my > result. Hence, the fill factor will be 0.5. However, both these methods give > an error with a fill factor less than 1.0. Also, if I use PETSC_DFAULT as the > fill argument, it agains results in an error since its value is -2. > > Kindly help me with your advice here. > > Thanks > Manav
