http://www.mcs.anl.gov/petsc/petsc-as/documentation/faq.html#sparse-matrix-ascii-format
Barry On Dec 21, 2010, at 10:03 PM, Gaurish Telang wrote: > i have this large text file containing a matrix. > > This text file contains the non-zero entries of a very large sparse matrix > > > The first two columns indicate the position of the non-zero entry > > and the last column the actual non-zero value it self > > > for > example the matrix > > 1 0 8 > > 0 0 5 > > 6 0 0 > > is written in the text file in the form of > > 1 1 1 > > 1 3 8 > > 2 3 5 > > 3 1 6 > > This is the standard [(row ,column), non-zero] entry format. > i want PETSc to load this matrix > > from the text file > > i am not sure how > > to do that. What commands do I use? > > I am new to PETSc, so some detail in the explanation will be really helpful. > > Sincere thanks, > > Gaurish.
