... 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). ...
13973
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...
13979
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...
13984
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...
13987
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...
13992
evanechang
evanechang@...
May 24, 2012 9:09 pm
woops. You're right! Thanks for the help, though, I'll make sure to read the help docs more closely next time....
Hi, I don't know about the specific code and everything behind this, but note the "file not found" error. Does the file exist and does matlab have access ...
Hi, i'm looking for someone to point me in the right direction. I would like to create a basic oscillating circle using PsychToolbox. Currently I have a code...
