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Average over a parametric sweep

Posted Jan 21, 2014, 5:11 a.m. EST Results & Visualization Version 4.3b 3 Replies

Jens Krause
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Hi,

I have a parametric study and would like to plot the average of an expression.
E.g: parameter alpha=0,1,2,3

then I would like to have an operator like

average(expr,alpha,list_of_values)

Is there a possibility to do this?

Thanks in advance.

Jens

3 Replies Last Post Jan 21, 2014, 9:38 a.m. EST
Bettina Schieche COMSOL Employee

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Posted: 1 decade ago Jan 21, 2014, 8:30 a.m. EST
Hi,

a useful option is provided by the Derived Values in the Results node. Here, the Data Series Operations provide an average over a parametric solution.

For field variables, I recommend having a look at the built-in operators "with" and "sum" in the documentation. The former gives you access to a solution with a certain index in a time-dependent or parametric study, the latter is a new feature with COMSOL 4.4 and allows for summation. An average can thus be realized by (sum(with(i,expr),i,1,4))/4 for a parametric solution with 4 iterations.

Regards
Bettina Schieche
Hi, a useful option is provided by the Derived Values in the Results node. Here, the Data Series Operations provide an average over a parametric solution. For field variables, I recommend having a look at the built-in operators "with" and "sum" in the documentation. The former gives you access to a solution with a certain index in a time-dependent or parametric study, the latter is a new feature with COMSOL 4.4 and allows for summation. An average can thus be realized by (sum(with(i,expr),i,1,4))/4 for a parametric solution with 4 iterations. Regards Bettina Schieche
Jens Krause
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Posted: 1 decade ago Jan 21, 2014, 9:35 a.m. EST
Hallo,

thanks for the reply. I need the average of field variables, so only the second option is possible.
But that requires version 4.4 which i cannot use due to huge bug in the ACDC module.

Regards

Jens
Hallo, thanks for the reply. I need the average of field variables, so only the second option is possible. But that requires version 4.4 which i cannot use due to huge bug in the ACDC module. Regards Jens
Bettina Schieche COMSOL Employee

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Posted: 1 decade ago Jan 21, 2014, 9:38 a.m. EST
You can also do the summation manually using the with operator.

Regards
Bettina Schieche
You can also do the summation manually using the with operator. Regards Bettina Schieche

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