[Gmsh] Plot differences

[Torquil Macdonald Sørensen]

On 31/01/13 17:56, Christophe Geuzaine wrote:
> On 06 Nov 2012, at 10:32, Torquil Macdonald Sørensen <torquil at gmail.com> wrote:
>
>> Hi!
>>
>> I'm currently using Gmsh to get surface plots of real valued functions on a mesh on the unit square (z-value of surface is proportional to function value). Is it possible to tell Gmsh to show the difference between two such functions, so that I can easily see if they are equal by visually inspecting if the difference vanishes?
>>
> I would use Plugin(MathEval) or Plugin(ModifyComponent)

Hi Prof. Christophe Geuzaine!

I managed to do it with the MathEval plugin as you recommended. My two 
plots were view 0 and view 1. So I selected View=0, OtherView=1, and 
Expression0=v0-w0. It worked perfectly!

Thanks!

Best regards
Torquil Sørensen