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Comsol with Matlab: How to save data

Posted Sep 1, 2011, 9:55 a.m. EDT 5 Replies

Jiaming Hao
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Hello,

I use Comsol (v3.5a) with matlab to do frequency sweep. The results (for example, S-parameters, S11) can be plotted in Matlab paint window using some postplot commands. But I would like to save the data in a file and plot them using other software like OrignPro. I try many times but couldn't fix it. As you know, if the results are plotted in Comsol paint window, they could be saved in a ASCII file. But in Matlab paint window, we cannot do that.
5 Replies Last Post Sep 7, 2011, 4:46 a.m. EDT
Jiaming Hao
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Posted: 1 decade ago Sep 5, 2011, 10:11 a.m. EDT
Does there anyone know how to fix this? Thank you very much in advance!

Does there anyone know how to fix this? Thank you very much in advance!
Rafal Piotuch
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Posted: 1 decade ago Sep 6, 2011, 4:41 a.m. EDT
Hi, I think that after solving a problem data is already saved in a fem. In my opinion you should check the Matlab Interface Guide for the proper syntax.

Hoping this helps, Rafał Piotuch.
Hi, I think that after solving a problem data is already saved in a fem. In my opinion you should check the Matlab Interface Guide for the proper syntax. Hoping this helps, Rafał Piotuch.
Jiaming Hao
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Posted: 1 decade ago Sep 6, 2011, 6:46 a.m. EDT
Hi, Rafal,

Thank you so much for your reply. I was really try to do that, but could not find such corresponding syntax. Anyway, I would try again. Thanks.

Best regards,


Hi, I think that after solving a problem data is already saved in a fem. In my opinion you should check the Matlab Interface Guide for the proper syntax.

Hoping this helps, Rafał Piotuch.


Hi, Rafal, Thank you so much for your reply. I was really try to do that, but could not find such corresponding syntax. Anyway, I would try again. Thanks. Best regards, [QUOTE] Hi, I think that after solving a problem data is already saved in a fem. In my opinion you should check the Matlab Interface Guide for the proper syntax. Hoping this helps, Rafał Piotuch. [/QUOTE]
Rafal Piotuch
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Posted: 1 decade ago Sep 7, 2011, 1:50 a.m. EDT
Hi - I have found it:
www.comsol.com/community/forums/3-5a/thread/20292/

Best regards,
RP
Hi - I have found it: http://www.comsol.com/community/forums/3-5a/thread/20292/ Best regards, RP
Jiaming Hao
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Posted: 1 decade ago Sep 7, 2011, 4:46 a.m. EDT
Thank you so much for your nice reply. I just found an alternative solution for my case. I attached my sample code here also.
------------------------------------------------------
S21 = [ ];

data = postglobaleval(fem,{'S21_rfwh'});
Frequency = data.x;
S21 = cat(2,S21, data.y);
-------------------------------------------------------

Here, S21 is S-parameters, it could be also any globally defined expression.



Hi - I have found it:
www.comsol.com/community/forums/3-5a/thread/20292/

Best regards,
RP


Thank you so much for your nice reply. I just found an alternative solution for my case. I attached my sample code here also. ------------------------------------------------------ S21 = [ ]; data = postglobaleval(fem,{'S21_rfwh'}); Frequency = data.x; S21 = cat(2,S21, data.y); ------------------------------------------------------- Here, S21 is S-parameters, it could be also any globally defined expression. [QUOTE] Hi - I have found it: http://www.comsol.com/community/forums/3-5a/thread/20292/ Best regards, RP [/QUOTE]

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