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Using Comsol Java API to Evaluate Expression at Arbitrary Point
Posted 2023年12月1日 GMT+1 15:18Interfacing, API, Results & Visualization1 Reply
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I am using the Java API to do some results post-processing on an electrostatics study. I came to a point in which I need to interpolate value of the electric potential at some specific point, but I cannot seem to find how to do that from theJava API documentation(alternative link)
In MATLAB Comsol, there is a functionmphinterpwhich does exactly what I want. How can I replicate this functionality in my Java code?
Is it even possible to do that with the Java API only?
P.S. I am doing some optimization in the Java code, which is performance sensitive, which is why I cannot use Matlab mphinterp.
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You can use the Interp numerical evaluation feature, see page 529 in your first link to the documentation. I think that this is what the mphinterp MATLAB function does.
Example: To evaluate the expression "my_expr" at x=0.5 in domain 1 in a 1D model, do as follows:
- NumericalFeature ev = m.result().numerical().create("interp","Interp");
- ev.selection().geom(1);
- ev.selection().set(1);
- ev.set("edim", 1);
- ev.set("expr"," "my_expr");
- ev.set("coord", new double[]{0.5});
- double[][][] data = ev.getData();
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