StimulusPresentation offline classifier training

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rm9
Posts: 4
Joined: 15 Mar 2011, 10:02

StimulusPresentation offline classifier training

Post by rm9 » 17 Mar 2011, 09:30

I'm trying to get the weights for a linear classifier from dat file I recorded with the StimulusPresentation.
Most of the "Offline Analysis" tools in BCI2000 are looking for the TargetDefinition matrix which exist only in the p300 speller task.

The P300Classifier either crashes or gives me an error of "dataset corrupted".
When I look at the soruce code for this message, again it's looking for a TargetDefinition matrix.

Am I missing some parameters in StimulusPresentation?

Thanks.

jawilson
Posts: 109
Joined: 28 Feb 2005, 16:31

Re: StimulusPresentation offline classifier training

Post by jawilson » 30 Mar 2011, 21:03

Hello,
You can use the Offline Analysis tool in Matlab with the stimulus presentation task. You simply use StimulusCode==1 (or 2, 3, etc) for the conditions, and StimulusCode > 0 for the trial change. Unfortunately, this does not automatically generate the classification matrices for you, but it will give you an idea of which evoked response(s) are significant.
Adam

gschalk
Posts: 615
Joined: 28 Jan 2003, 12:37

Re: StimulusPresentation offline classifier training

Post by gschalk » 31 Mar 2011, 07:12

The most recent version of the P300Classifier should work with StimulusPresentation.

Gerv

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