Hi All, I am trying to write a script that uses multiple screens in the following manner: the main screen (display 0) is just a black screen with a text...
If you don't have much coding experience, I would recommend implementing your experiment in Psyscope (free) or E-prime (not free) . Both programs have a pretty...
You are not doing anything wrong. The simple explanation is that you bought a computer for professional work from a phone company. Among the numerous...
Thanks for your insightful comments Mario. I too lament the fact that Apple has essentially become a phone/pad/toy maker. I think your work-around is quite...
... Another thing you can do is to set the gamma tables of the displays you don't want to use to all-zero: oldlut2 = Screen('LoadNormalizedGammatable', 2,...
After some food intake and some more coffee, some stuff i forgot: If you choose to use Screen('Preference','ConserveVRAM', 16384); you have to use it *after*...
... Two full screen windows on two monitors (one LCD, one CRT) works OK in OS X 10.7.4, I haven't tested timing fidelity on the second display, but visually it...
13969
Yair Pinto
yair.pinto@...
May 19, 2012 6:08 pm
Dear moderator: could you please post the following on my behalf? "Hi, I have the problem that most computers at our university do not support matlab....
13970
philliplaw2012
philliplaw2012@...
May 20, 2012 1:34 pm
Hello all, I'm trying to present 2 superimposed square-wave gratings based on the driftdemo2 example, each grating with duty cycle of 30%. However, I'm having...
Hi Mario and Listers, I was wondering if there is any update on sending and receiving TTL triggers via the parallel port in Linux (using IOPort?)? I have tried...
here's some alpha-quality code. sending and receiving should both work and be very fast (way under 1ms). ...
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Dr. Alexander Klein
Alexander.Klein@...
May 21, 2012 1:32 pm
... Mario told us a while ago that everything related to the parallel port was to become easier with the next release. For the time being I use some own code...
Hi Erik, Thanks for the files! I compiled it and had a go but I get this error: Error using pp (line 189) bad addr which is something to do with Sscanf as when...
13975
davide.tabarelli
davide.tabarelli@...
May 21, 2012 1:34 pm
Dear All, I'm writing to share with the community the solution I've developed to solve the bothering OutOfMemory error that some times occurs when using PTB. A...
13976
postaperfra
francesco.biondi@...
May 21, 2012 2:10 pm
Hi! thanks for your reply! Anyway, I have already tried to do it with E-prime, but I did not manage to do anything. I know this may be done with matlab..do you...
... did you run matlab as root? (start it with sudo matlab) ... i updated pp.m to show some more debug output, please download and rerun w/ useSscanf=true and...
Because everything has to end at some point, not only "House M.D." finishes today with the final "Everybody Dies" episode, but also the v-3.0.9 PTB series ends...
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Dr. Alexander Klein
Alexander.Klein@...
May 22, 2012 1:06 pm
... I think mex-files work, but I've never tried it myself, since I see Octave primarily as Octave, and not Matlab without a price tag ... So if your code...
The octave->mex interface in octave 3+ works very well. That's how we do it with ptb, we just recompile the matlab mex files as "octave mex files". We only...
13981
evanechang
evanechang@...
May 22, 2012 7:16 pm
I should mention that ImagineStereoDemo(8,0,1) gives me the same bug. Thanks again, Evan...
13982
evanechang
evanechang@...
May 22, 2012 7:18 pm
Hi, I'm hoping someone can help me out. I'm trying to write a movie to disk, but my code bugs up even when I run these two lines: [windowPtr rect] =...
Hi, We want to do psychophysics experiments in which we want to accurately record reaction times (rapid RT so time precision is important). I didn't find any...
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evanechang
evanechang@...
May 22, 2012 8:22 pm
Ok, for some reason I got more output on a different machine: PTB-ERROR: Tried to startup GStreamer. This didn't work, PTB-ERROR: because one of the required...
13985
evanechang
evanechang@...
May 22, 2012 8:23 pm
Update: I downloaded GStreamer (x86), but no success there, even after using Screen('Preference', 'DefaultVideocaptureEngine', 3); % GStreamer=3, Quicktime=0 ...
Sebastien, I've had decent success with Xkeys. http://www.piengineering.com/xkeys.php Specifically, I've used the foot pedal version as a "big button" response...
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evanechang
evanechang@...
May 22, 2012 10:09 pm
All right, another update: I'm not too sure if GStreamer (vs QuickTime) is the route I want to go, but I uninstalled and reinstalled it and got a new set of...
... Yep. You probably just installed a wrong version of GStreamer, which doesn't contain the needed codec plugins. You'll need the GPL version, not the LGPL...
Hi everybody, again, I have to apologize for a very long delay since my last post on this topic. However, this was merely due to the fact, that the pre-warping...
Thanks very much Jurnell for your answer. Finally, we will probably get the response time box (http://lobes.usc.edu/RTbox/). It seems to be the best...
... ok, this is fixed. keith's machine had 888 1912 in /proc/sys/dev/parport/parport0/base-addr whereas my machines always have 0 for the second number. i...
