Why the GUI not upload and sidplay when I call it with another function in parallel?

I have a function to record an EEG data from EEG device--->name it f1

And I have another function to do some flsahes on GUI that I created ---> name it f2

I would like to execute the two function simultaneously because the time here is very important and later I want to analyse the EEG data that I collected depend on the flashing.

I call the two function in parallel by:

   funList = {@f1,@f2};
   matlabpool open 2
   spmd
       labBarrier
       funList{labindex}()
   end
   matlabpool close

Every thing is fine from the parallel side (because the two functions works together), but the problem in GUI where it is working without upload or display to the user screen. Where it is working perfect if I call the GUI (f2) without calling f1(recording EEG data).

Note: I have 4 GB RAM size and 4 CPUs 3.1 GHz on my desktop.

Any solution????

Answer 1

[Walter Roberson]

Processes executed in parallel are (at least modelled as) independent processes that cannot talk to the screen (the screen is not in their address space.)

You should instead have a look at Psychometric Toolbox, http://psychtoolbox.org/PTB-2/intro.html

[Qasem]

Hello Walter

I did not find Psychometric Toolbox in Matlab. Also, you sent me the Psychophysics Toolbox and I don't know if they are the same.

If I want to use the Psychophysics Toolbox, could you please tell me how?

Thank you in advance

[Walter Roberson]

Sorry I gave the wrong name. That URL is correct.

[Qasem]

That is fine.

Thank you

[Qasem]

Walter,

I downloaded it correctly.

Do you know the peice of code I can write to work with two different functions simultaneously and upload and display the GUI in one of them? I read the document but I did not understand how to use the toolbox.