Discussion Forum

Posted: 1 decade ago 5 ott 2009, 17:21 CEST

Hi have you read through and understood the chapter on posteval in the command.pdf documentation file ? there are a few comments about complex data, I suspect (havnt tried recently) that you must make two reads one for the phase=0 (real part) and one for phase=90° (complex part). there is also the Complexfun variable, that I understand more for the resolution with complex functions, to ell the solver to consider complete complex values, not just the real part. Goog luck Ivar

Posted: 1 decade ago 6 ott 2009, 11:34 CEST

I dont think adding a phase of 90deg is the answer. I simply cant figure out what can export complex values. Another problem in Matlab/Comsol is the following error i get: >> fem.sol.u ??? Undefined function or method 'flgetarray' for input arguments of type 'int32'. Error in ==> flexchprop>l_flgetmatrix at 53 vao = flgetarray(exch.getDim,exch.getAdr,exch.isReal); Error in ==> flexchprop at 21 [varargout{1:nout}] = l_flgetmatrix(outprop, outstr); Error in ==> femsol.subsref at 30 out(:,i)=flexchprop('flgetmatrix',prop,STR); What can i do about that? Thanks

Posted: 1 decade ago 6 ott 2009, 13:38 CEST

Hi I can do little with the cryptic error messages of COMSOL, the best is to get their help there. The only I have noticed is that the "fl" introduction to function names stands for original "Femlab" code, and what is written below you had an "get-array" 'int32' cast error when attempting to access parts of "fem.sol.u". Now concerning the phase, I might not fully understand what you are searching, but you can find how the "phase" is linked in here in COMSOL , i.e. in the smeug.pdf file (an excerb is attached below), or in the knowledgbase: http://www.comsol.com/support/knowledgebase/878/ http://www.comsol.com/support/knowledgebase/1009/ these are more related to AC/DC but they also apply by similiriaty to structural Good luck Ivar

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Posted: 1 decade ago 9 ott 2009, 09:17 CEST

Apperently you were right about splitting the results in imaginary and real parts. This is my solution: data= posteval(fem,'p','Solnum','all') data2=posteval(fem,'imag(p)','Solnum', 'all')