You can extract matrix blocks using MatGetSubMatrix(). Matt
On Fri, Sep 5, 2008 at 6:50 AM, Michel Cancelliere <fernandez858 at gmail.com> wrote: > Hi All, > > I am building a shell preconditioner, for implement that I should divide a > sparse matrix into four blocks of dimension N/2xN/2 (N size of the Matrix), > I took a look to src/mat/examples/tutorials/ex2 but it is for dense matrix. > There is a function for do that in Petsc? or another method for efficiently > implementation? > > Thank you, > > Michel Cancelliere > -- What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead. -- Norbert Wiener
