Discussion Forum

Posted: 1 decade ago Aug 17, 2011, 2:55 a.m. EDT

Hi check the capabilities of the Results Derived Values, there you can postprocess and dump the desired values in a table and export that as a file or with cut&Paste -- Good luck Ivar

Posted: 1 decade ago Oct 25, 2011, 4:18 p.m. EDT

I have almost the same question. I have defined the Export/data node, but I have to choose manually every parametric change. What would be great is being able to export the results that I need (I'm doing induction heating and just need to store temperature) automatically at every iteration. Is there any way?

Posted: 1 decade ago Oct 26, 2011, 2:27 a.m. EDT

Hi I suppose you can dumpt the desired results into a table and export the table in one go (for all parameter values) -- Good luck Ivar

Posted: 1 decade ago Jul 4, 2012, 3:34 p.m. EDT

I would also like to dump the results (and derived values) into a file or table. I have 133 results from a 3D model with 20 eigenfrequencies each. When I try to evaluate the derived values (all or individually) of solution set Parametric 2 (which I believe is the complete set of all solutions), I get the following error: "Property solnum out of range." 1) Is there anyway to resolve this problem so I can evaluate the all my derived values at once (instead of 133 times individually)? 2) Is there any other way to export results and derived values for a large parametric sweep? I tried using the Export node, but I was only able to figure out how to do each run individually. Exporting from the solution set Parametric 2 yielded an empty table. Thank you, Ian

Posted: 1 decade ago Jul 4, 2012, 5:58 p.m. EDT

Hi you can also export a data set or a sub set. The solnum issue is when you want to dump two table list results that do not have the same number of lines into an existing table -- Good luck Ivar

Posted: 1 decade ago Jul 6, 2012, 4:30 p.m. EDT

Ivan, Thank you for your rapid reply. I am still having a few problems exporting however. 1) When I export a data set in the Export node, COMSOL only allows me to export the results from each sweep individually (I must pick a specific run, and "ALL" is not an option). How can I export the results from all the sweeps at once? 2) Could you please explain the solnum issue further? Because of this error I believe, I can not compute my derived variables or export any data from my combined sweep results (though I can export each run individually). Thank you very much, Ian

Posted: 1 decade ago Jul 6, 2012, 5:03 p.m. EDT

Hi I mostly get that erro if I try to load in a table with one line a reference from a series, or the contrary, if I have already dumped in a series and I try with a single line value, or a another number of line table entry, -- Good luck Ivar

Posted: 1 decade ago Jul 9, 2012, 12:48 p.m. EDT

Thank you for your help Ivan. I was not able to work around the error, so I had to re-run the sweep by breaking it into two sweeps. That allowed me to resolve my derived variables all at once and export them as I desired. Not sure if there is a limit to how big an array can be, but I will be limiting my arrays in the future to avoid this problem again. If there is a limit, I wish COMSOL would document it so it was known.

Posted: 1 decade ago Aug 27, 2012, 10:35 p.m. EDT

HI, I have a similar question about exporting data into a file while sweep parameters in COMSOL model through Matlab livelink. I set the parameter V2 , for instance in a for loop in a Matlab function by " model.param.set('V2',V2); then run the study by "model.sol('sol1').run;" . In COMSOL GUI, I need to export the data manually into files. Here I was able to extract some information on 1D edges by mpheval. However, for a 2D domain, I don't quite get the format of the information I extract by mpheval. So I decided to save the data into file and call the variables. My question is how to save data into a file through Matlab function which runs the loop for sweep parameter. I would appreciate a prompt comment on my problem. Thanks, Elham

Posted: 1 decade ago Aug 27, 2012, 11:50 p.m. EDT

[QUOTE] I would also like to dump the results (and derived values) into a file or table. I have 133 results from a 3D model with 20 eigenfrequencies each. When I try to evaluate the derived values (all or individually) of solution set Parametric 2 (which I believe is the complete set of all solutions), I get the following error: "Property solnum out of range." 1) Is there anyway to resolve this problem so I can evaluate the all my derived values at once (instead of 133 times individually)? 2) Is there any other way to export results and derived values for a large parametric sweep? I tried using the Export node, but I was only able to figure out how to do each run individually. Exporting from the solution set Parametric 2 yielded an empty table. Thank you, Ian [/QUOTE] Hi, You can also use probes and that way, export the results to a file while the solver is running. The file is updated on each step of your parametric analysis. See: http://www.comsol.com/community/forums/general/thread/30712/ -- Tolga