Search found 6 matches

by jwlbci
09 Oct 2009, 15:07
Forum: BCI Systems - Signal Processing
Topic: BCI v3 Question Regarding P300 Class. GUI
Replies: 4
Views: 2483

Specific Error

I was trying to access the older P300 GUI through MATLAB when I get this error on two separate XP machines: ??? In an assignment A(I) = B, the number of elements in B and I must be the same. Error in ==> getInfo at 133 parms.NumMatrixRows(kk)=(prm.NumMatrixRows.NumericValue); Error in ==> P300_GUI>r...
by jwlbci
29 Sep 2009, 17:04
Forum: BCI Systems - Signal Processing
Topic: BCI v3 Question Regarding P300 Class. GUI
Replies: 4
Views: 2483

BCI v3 Question Regarding P300 Class. GUI

I have a question regarding the P300classifier.exe GUI. My current version of BCI2000 is about a year old, but I do have the p300 classifier GUI from v3. Whenever I try to generate feature weights with it, all fields are green, but I keep receiving errors. I'm using Windows 7 now. Do I need to put i...
by jwlbci
14 Aug 2009, 16:26
Forum: BCI Systems - Signal Processing
Topic: R Squared Anomaly in Mu Tutorial
Replies: 1
Views: 2071

R Squared Anomaly in Mu Tutorial

Hello, I'd like to ask a question about the R values on the mu tutorial. When I plot the features, certain subjects have significantly lower R values than than I expected. The subjects have gone through the non-feedback protocol several times, but only reaching smaller R values (.02 or .06 at most)....
by jwlbci
14 Aug 2009, 12:51
Forum: BCI Systems - Signal Processing
Topic: Mu Tutorial Issues
Replies: 3
Views: 1910

Thank you for the reply. Is there any thing I can do in the meantime to fix this? Thanks. -John
by jwlbci
13 Aug 2009, 18:45
Forum: BCI Systems - Signal Processing
Topic: Mu Tutorial Issues
Replies: 3
Views: 1910

Mu Tutorial Issues

Hello, trying to run the mu tutorial. We have performed the calibration sessions multiple times. Our r squared values are lower than we expected, with the maximum being .06 for one subject, and .2 out of all subjects. However, features are where we expected them to be. We have decided to move onto t...
by jwlbci
13 Aug 2009, 14:06
Forum: BCI Systems - User Applications
Topic: Low r values during mu tutorial?
Replies: 0
Views: 2368

Low r values during mu tutorial?

Hello, I'd like to ask a question about the R values on the mu tutorial. After feature extraction and selection, certain subjects have significantly lower R values than the demo. For the case of the demo files, R values were in the 'tenths' value range, from .3 and so on. The subjects have gone thro...