Discussion Forum

your questions are:

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a) how can i control or use this model in matlab?
b) can i do a parametric sweep using matlab?
c) can i see somhow the results make plots of it?
d) how can i see my results? in matlab? in comsol?
e) can i change the geometry in matlab and see the change in comsol?
f) i really would like to be guided or helped or read from a nice guide document

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I'm not sure anyone here will explain in details how to do such things, because you should learn it by making simple examples on your own, and read the Users Guide. however, I'll give you some tips that will help you:

Open "Matlab with COMSOL41" and also open another "COMSOL41" (not with matlab). When you run a script in MATLAB livelink, you can see the resulting model in the independent COMSOL41 window in File->import model, etc.... Then you can see if everything is ok when you make some change in your Matlab script file.

answer to your questions:

a) Save your model in COMSOL as a matlab file. Then open this file with a "Matlab with COMSOL41" session. You will be able to find how the model is set and you can make your own change there.
b) Add a parametric sweep node in your COMSOL file, save your file as a Matlab file and look at the new code that has been generated compared to the previous script without parametric sweep.
c) look in the userguide about the matlab function "mphplot"
d) same answer
e) run your new script file (with the new geometry) and then import it in an independant COMSOL41 session (as explained above)
f) User Guide, open "Help" in COMSOL 4.1

I hope it will help you

----------------
Frank

thank you very much
you are very clear and this is the kind of help i'm looking

i'll do what you said and come back latter with my inputs thanks alot

and a small question forward;

if i use param.txt file with parametes in my comsol model
so when i use matlab should i just save the model
as model.m file or i should put
param.txt in the same folder with my model.m file
in matlab

and is there a possibly to receive a help from you in some other comunicational way like skype or chat?
mine skype arye.nuelman

Best regards,
Arye

thanks Frank your advice so helped me
thank you thank you

i have a lot of sucses with my model in matlab
:-))))

now my question is:

if it is possible to run my model as like it was a function

attached
for I.e the picture show i have a for in my model
but i want the for to be outside the model and to run the model
as if it is a function that the for is calling for it

Best regards,
Arye

Hi arye

I am working with same problem as you have. i have exported my mph file as model using 'mphload' and i am trying to run the model in a loop. the purpose is to run the model with varying parameters. but i am not able to save the results as it saves only the last sol.

it would be nice if someone could post a simple example on that

thanks

There are detailed examples of models in Matlab, including models run in loops, in the LiveLink for Matlab Users Guide (pdf). I believe that is why no one is bothering to answer you on the forums.

Check out page 35 for running models in loops. Hope this helps, I am a COMSOL noob myself.