Discussion Forum

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

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

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:

www.comsol.com/support/knowledgebase/878/
www.comsol.com/support/knowledgebase/1009/

these are more related to AC/DC but they also apply by similiriaty to structural

Good luck
Ivar

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')