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How to export the surface plot data from comsol to matlab?
Posted Jun 9, 2014, 4:31 a.m. EDT 1 Reply
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Dear all,
I am using comsol 4.2a. I want to export the surface plot data in comsol to Matlab.
Kindly let me know how can i do this?
Thank you
I am using comsol 4.2a. I want to export the surface plot data in comsol to Matlab.
Kindly let me know how can i do this?
Thank you
1 Reply Last Post Jun 10, 2014, 5:44 a.m. EDT
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Posted:
1 decade ago
Hi Paul,
In your results node there is an export node. Add a data subnode to that. In that node, define the expression that you want to evaluate and export. What I did was leave 'points to evaluate in' at 'take from data set'. This will result in a table with one row per grid point, with its x- and y-position and the value at that position. You can import the generated file in matlab and interpolate it there to values at any x- and y- position (for example a uniformly distributed rectangular grid) using the 'griddata' function.
You can also interpolate to a rectangular grid while exporting but this leads to a loss of data.
In your results node there is an export node. Add a data subnode to that. In that node, define the expression that you want to evaluate and export. What I did was leave 'points to evaluate in' at 'take from data set'. This will result in a table with one row per grid point, with its x- and y-position and the value at that position. You can import the generated file in matlab and interpolate it there to values at any x- and y- position (for example a uniformly distributed rectangular grid) using the 'griddata' function.
You can also interpolate to a rectangular grid while exporting but this leads to a loss of data.