Search found 5 matches

by dmcfarland
25 Jan 2016, 08:57
Forum: BCI Systems - User Applications
Topic: Wolpaw Cursor Control Regression Weights
Replies: 2
Views: 943

Re: Wolpaw Cursor Control Regression Weights

We didn't mention this in the article, but there was a column of 1s in the X matrix that would represent the intercept. This doesn't matter though as the signal was normalized in real time with respect to the mean and standard deviation. One other issue- whether the intercept is 0 or not is not a ma...
by dmcfarland
29 May 2012, 11:36
Forum: Data Analysis
Topic: Using OfflineAnalysis to select control feature(s)?
Replies: 4
Views: 3152

Re: Using OfflineAnalysis to select control feature(s)?

Normally a spatial filter is helpful and you might consider evaluating one (e.g., Common average or surface Laplacian). The bias due to the skewed distribution of signal amplitude values can be reduced by a log transform as you suggest. See the expression filter (http://72.249.19.64/wiki/index.php/U...
by dmcfarland
02 Jul 2007, 11:52
Forum: Software Development
Topic: Mu rhythm filter
Replies: 1
Views: 2390

Mu rhythm matched filter

I can e-mail the source code for this (sub) module. Just contact me at mcfarlan@wadsworth.org
by dmcfarland
25 Mar 2005, 08:48
Forum: Configuration
Topic: RJB vs D2Box
Replies: 9
Views: 6410

The lms file should contain values when WeightUse = 1. Perhaps there is some other problem. Try running it with WeightUse = 2 (perhaps without actually having a subject attached). The adaptation also depends upon the values in row 7 of the Target Position Matrix (adaptcode). If this value is 0 (or s...
by dmcfarland
24 Feb 2005, 14:19
Forum: Configuration
Topic: RJB vs D2Box
Replies: 9
Views: 6410

RJB D2Box and adaptation of weights

RJB does not support weight adaptation. In fact, RJB is not currently being updated since D2Box can do the same functions and more. There is no way to specificy the code for adaptation in RJB. This is part of the target definition in D2Box. Parameter fragments are available to parameterize D2Box so ...