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Trouble extracting a derived value into Matlab
Posted Mar 7, 2012, 6:09 a.m. EST Interfacing 1 Reply
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As the title says I got some trouble getting numerical values from my derived values into matlab variables when using the livelink for matlab. What I do is I create a model in comsol, save it as an .m file, turn it into a function and use it in an optimization algorithm. Thus I need to get a comsol derived value into a matlab variable to close the loop.
What I get when I translate the model into an .m file is this:
model.result.numerical.create('av2', 'AvSurface');
model.result.numerical('av2').selection.all;
model.result.numerical('av2').selection.set([2]);
model.result.numerical('av2').set('expr', 'sqrt((mfnc.Br*d(mfnc.Br,r)+mfnc.Bphi*(1/r)*d(mfnc.Br,phi)+mfnc.Bz*d(mfnc.Br,z))^2+(mfnc.Br*d(mfnc.Bphi,r)+mfnc.Bphi*(1/r)*d(mfnc.Bphi,phi)+mfnc.Bz*d(mfnc.Bphi,z))^2+(mfnc.Br*d(mfnc.Bz,r)+mfnc.Bphi*(1/r)*d(mfnc.Bz,phi)+mfnc.Bz*d(mfnc.Bz,z))^2)');
What I want to do is get the value of 'av2' into a matlab variable. I tried using mpheval and mphglobal but it didnt work, not sure if I am using them right.Does anyone have any ideas?
Hello George Kanakaris
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I think you might try:
model.result.numerical('av2').getReal()
If it doesn't work look into the PDF above
Best
Peter