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postprocessing a new variable in matlab linked with comsol
Posted Nov 16, 2010, 11:14 a.m. EST 2 Replies
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Hi
i built a model in comsol and solved it in matlab. i have to add some new variables in matlab code. when i solve the code again, i can not plot these new variables. for example i have a variable named "CC" and
postplot(fem, ...
'tridata',{'CC','cont','internal','unit','Pa'}, ...
'trimap','Rainbow', ...
'title','Surface: Pressure [Pa]', ...
'axis',[-0.18761703121535322,0.08761702227465648,-0.08600000590085984,0.04599999934434891]);
it shows this error
xception:
com.femlab.jni.FlNativeException: Failed to evaluate expression
Messages:
Failed to evaluate expression
- Expression: CC
Failed to evaluate variable
- Variable: CC
- Geometry: 1
- Subdomain: 1
Undefined post expression
How can i plot my new variable?
any answer would be appriciated
with best regards,
fatemeh sharifi
i built a model in comsol and solved it in matlab. i have to add some new variables in matlab code. when i solve the code again, i can not plot these new variables. for example i have a variable named "CC" and
postplot(fem, ...
'tridata',{'CC','cont','internal','unit','Pa'}, ...
'trimap','Rainbow', ...
'title','Surface: Pressure [Pa]', ...
'axis',[-0.18761703121535322,0.08761702227465648,-0.08600000590085984,0.04599999934434891]);
it shows this error
xception:
com.femlab.jni.FlNativeException: Failed to evaluate expression
Messages:
Failed to evaluate expression
- Expression: CC
Failed to evaluate variable
- Variable: CC
- Geometry: 1
- Subdomain: 1
Undefined post expression
How can i plot my new variable?
any answer would be appriciated
with best regards,
fatemeh sharifi
2 Replies Last Post Nov 17, 2010, 2:11 a.m. EST
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Posted:
1 decade ago
Hi
I understand the message as if your variable CC isnot defined on that particular domain, so either you exclude the domain, or you ensure that the variable CC is sufficiently "global", and has a meaning over the full geoemtry.
Check the definition of CC and see if you have not selected some local instad of a global validity region
--
Good luck
Ivar
I understand the message as if your variable CC isnot defined on that particular domain, so either you exclude the domain, or you ensure that the variable CC is sufficiently "global", and has a meaning over the full geoemtry.
Check the definition of CC and see if you have not selected some local instad of a global validity region
--
Good luck
Ivar
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Posted:
1 decade ago
Hi Ivar,
Thank you for your attention. i have to plot my new variable over my domain so i can't exclude it from domain. I define some global expression ('H' )for my model but in matlab this variable is not updated( i could'nt for example set my new variable 'CC' as my previous global expression (H=CC))
How can i introduce my CC as an global variable so i can plot it over my domain and use it in other part of my problem?
Thank you very much
With Best Regards,
Fatemeh Sharifi
Thank you for your attention. i have to plot my new variable over my domain so i can't exclude it from domain. I define some global expression ('H' )for my model but in matlab this variable is not updated( i could'nt for example set my new variable 'CC' as my previous global expression (H=CC))
How can i introduce my CC as an global variable so i can plot it over my domain and use it in other part of my problem?
Thank you very much
With Best Regards,
Fatemeh Sharifi