hello, petsc teams, when I use FormFuncion(), I need use a value of x;
but x is defined by Vec, I don't know how to get a value of x, for example, the 3rd value. thanks, leping ???? Jed Brown ????? 2010-04-16 21:21:47 ???? chenleping; PETSc users list ??? ??? Re: [petsc-users] array and vec On Thu, 15 Apr 2010 21:17:19 +0800, "=?gb2312?B?s8LA1sa9?=" <chenleping at yahoo.cn> wrote: > petsc teams, > > for following definitions: > > double precision u(n) > Vec v > > then, how can I actualize mutual updating between u(n) and v? I'm not sure what you mean, if these are the same quantity then they shouldn't be stored in separate locations. See VecGetArray: http://www.mcs.anl.gov/petsc/petsc-as/snapshots/petsc-current/docs/manualpages/Vec/VecGetArray.html Jed -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20100415/ff022f5a/attachment-0001.htm>
