On Mar 30, 2012, at 6:15 PM, Matthew Knepley wrote: > On Fri, Mar 30, 2012 at 5:59 PM, Andrew Spott <andrew.spott at gmail.com> > wrote: > When is it necessary to assemble a matrix/vector? Do I need to do it after > every change in the matrix/vector? Or just after "AddValue(s)" type > functions? > > Every change.
Well after calls to MatSetValues and friends but not MatScale() MatShift() MatAXPY() etc > > Matt > > -Andrew > > > > -- > 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
