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Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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export plot data to txt file

Posted 03.03.2011, 13:27 GMT-5 Version 4.1 3 Replies

Simon Weinand
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hi

i want to export the plot data from a slice-plot (dimensions: 1mx1m) into a txt-file.
as result i get a txt-file which has a size of ~8MB, but unfortunatly it does not contain the data from the whole plot. i think that maybe there is to much data.
so i know that i can reduce the size of data with a coarser mesh.
but is there an other way to limit the data size. is it posible to assign an area inside the slice plot so that i can only export the plot data of this area?

thanks in advance for your efforts
Simon
3 Replies Last Post 03.03.2011, 16:10 GMT-5
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 03.03.2011, 14:40 GMT-5
Hi

via matlab you can aleways re-interpolate over a coarser grid, not sure how to in the COMSOL v4 GUI. But if you do not need the full area cut your domain with a urface and define just the region of interest, if its an "interiour" boundary at most you add a little to your matrices, and a few nodes on the interiour boundary but this seldom gives convergion issues, on the otehr side its easy to pick a boundary and then use it to integrate or average our variables.

You also have the extrusion coupling variables that could be used

--
Good luck
Ivar
Hi via matlab you can aleways re-interpolate over a coarser grid, not sure how to in the COMSOL v4 GUI. But if you do not need the full area cut your domain with a urface and define just the region of interest, if its an "interiour" boundary at most you add a little to your matrices, and a few nodes on the interiour boundary but this seldom gives convergion issues, on the otehr side its easy to pick a boundary and then use it to integrate or average our variables. You also have the extrusion coupling variables that could be used -- Good luck Ivar
Danial Tz
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Posted: 1 decade ago 03.03.2011, 15:16 GMT-5

hi

i want to export the plot data from a slice-plot (dimensions: 1mx1m) into a txt-file.
as result i get a txt-file which has a size of ~8MB, but unfortunatly it does not contain the data from the whole plot. i think that maybe there is to much data.
so i know that i can reduce the size of data with a coarser mesh.
but is there an other way to limit the data size. is it posible to assign an area inside the slice plot so that i can only export the plot data of this area?

thanks in advance for your efforts
Simon


maybe it has something to do with Java memory size allocation in comsol.ini. Maybe you can increase them and see if it works.

Danial


--
Comsol 4.1
Ubuntu 10.04.1
[QUOTE] hi i want to export the plot data from a slice-plot (dimensions: 1mx1m) into a txt-file. as result i get a txt-file which has a size of ~8MB, but unfortunatly it does not contain the data from the whole plot. i think that maybe there is to much data. so i know that i can reduce the size of data with a coarser mesh. but is there an other way to limit the data size. is it posible to assign an area inside the slice plot so that i can only export the plot data of this area? thanks in advance for your efforts Simon [/QUOTE] maybe it has something to do with Java memory size allocation in comsol.ini. Maybe you can increase them and see if it works. Danial -- Comsol 4.1 Ubuntu 10.04.1
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 03.03.2011, 16:10 GMT-5
Hi

check www.comsol.com/support/knowledgebase/1092/

for the java ini

--
Good luck
Ivar
Hi check http://www.comsol.com/support/knowledgebase/1092/ for the java ini -- Good luck Ivar

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