On Nov 22, 2011, at 4:26, Anders Logg <l...@simula.no> wrote: > On Tue, Nov 22, 2011 at 12:38:46PM +0100, Martin Sandve Alnæs wrote: >> On 22 November 2011 12:33, Anders Logg <l...@simula.no> wrote: >>> On Tue, Nov 22, 2011 at 11:43:51AM +0100, Martin Sandve Alnæs wrote: >>>> Currently I'm doing: >>>> v = u.vector() >>>> v[:] = x >>>> v.axpy(1.0, y) >>>> to set the Vector of Function u to x+y, where x,y are Vectors. Is this >>>> the best way?
You can also do: v += y But that just calls axpy. This is pretty transparent in the C++ code. >>> >>> This should work: >>> >>> u.vector()[:] = x + y >> >> Ok, but that will create a temporary vector and thus be more costly, right? Yes. Johan > I expect so but I'm not sure. Johan Hake knows. > > -- > Anders > > _______________________________________________ > Mailing list: https://launchpad.net/~dolfin > Post to : dolfin@lists.launchpad.net > Unsubscribe : https://launchpad.net/~dolfin > More help : https://help.launchpad.net/ListHelp _______________________________________________ Mailing list: https://launchpad.net/~dolfin Post to : dolfin@lists.launchpad.net Unsubscribe : https://launchpad.net/~dolfin More help : https://help.launchpad.net/ListHelp
