[petsc-users] array and vec

陈乐平(Leping Chen) chenleping at yahoo.cn
Thu Apr 15 09:14:57 CDT 2010

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.



发件人: Jed Brown 
发送时间: 2010-04-16  21:21:47 
收件人: chenleping; PETSc users list 
主题: 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:
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