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Plotting unwrapped phase

Posted Nov 26, 2010, 12:04 p.m. EST Acoustics & Vibrations, Parameters, Variables, & Functions Version 4.3b 4 Replies

Tom Alexander Solgård
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I am plotting the phase response of a loudspeaker, and I want to unwrap it (like what the Matlab command unwrap() does)

www.mathworks.com/help/techdoc/ref/unwrap.html

Any ideas?
4 Replies Last Post Aug 30, 2013, 7:50 a.m. EDT
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago Nov 26, 2010, 5:44 p.m. EST
Hi

good remark, I have looked for something like that too, the atan2(,) I normally use does not unwrap ;)

--
Good luck
Ivar
Hi good remark, I have looked for something like that too, the atan2(,) I normally use does not unwrap ;) -- Good luck Ivar
Tom Alexander Solgård
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Posted: 1 decade ago Dec 3, 2010, 12:13 p.m. EST

Is it possible to use a Matlab function like unwrap() inside Comsol Desktop in some way?
Is it possible to use a Matlab function like unwrap() inside Comsol Desktop in some way?
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago Dec 4, 2010, 7:43 a.m. EST
Hi

probably yes, as there is the "external" function operator, but I have never tried it (yet) in V4

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Good luck
Ivar
Hi probably yes, as there is the "external" function operator, but I have never tried it (yet) in V4 -- Good luck Ivar
Ysbrand Wijnant
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Posted: 1 decade ago Aug 30, 2013, 7:50 a.m. EDT
I use the unwrap function (as an external Matlab function) but get very strange results while plotting ... added a post about it. The phase doesn't become smooth using unwrap in Comsol, instead it shows a lot of phase jumps ??? We (2 PhD's and I) have been struggling and we can't find the problem ...
I use the unwrap function (as an external Matlab function) but get very strange results while plotting ... added a post about it. The phase doesn't become smooth using unwrap in Comsol, instead it shows a lot of phase jumps ??? We (2 PhD's and I) have been struggling and we can't find the problem ...

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