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## Re: [Getfem-users] Position dependent elliptic problem

 From: Arvind Ajoy Subject: Re: [Getfem-users] Position dependent elliptic problem Date: Mon, 6 Jul 2009 21:44:16 +0530

Hi Mattia

I remember a similar question was posted sometime back. I have
located the solution given then.

for a description of the problem, and its solution.

Regards
Arvind

On Mon, Jul 6, 2009 at 9:34 PM, Mattia Assanelli wrote:
A(x) for me isn't a function, but a vector...

Arvind Ajoy ha scritto:
> Hi Mattia,
>
> Try the following to set A = cos(pi*x) in a 1-D problem.
>
> A = gf_mesh_fem_get(MFU, 'eval', {'cos(pi * x)'});
>
> Arvind
>
>
>
> On Mon, Jul 6, 2009 at 2:42 PM, Mattia Assanelli
>
>     Good morning everybody,
>     first of all I'd like to thank people reading and suggesting solutions
>     in this list: I always found a solution for my trivial problems!
>     I have to set a position dependent 'A' parameter in a 'generic
>     elliptic'
>     problem. I think I have to use this function and pass the 'A'
>     parameter
>     as 'V'.
>
>     gf_mdbrick_set
>     name, MF,V | V) : change the value of a brick parameter. V should
>     contain the new parameter value. If a meshfem is given , V should hold
>     the field values over that meshfem (i.e. its last dimension should be
>     gf_mesh_fem_get
>
>     But my question is: "How to format this matrix? V"
>
>     Thanks a lot Mattia
>
>
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>     Getfem-users mailing list
--
-------------------------------------------------
Mattia Assanelli
Ph.D. Student
Politecnico di Milano
Dipartimento di Elettronica ed Informazione
Phone:  +39 02 2399 3735