[Eeglablist] a question about csp code ,please help me

[Arnaud Delorme]

Dear Ahmad,

I suggest you look up the following article which has code snippets to compute CSP in Matlab (page 9).

http://sccn.ucsd.edu/~arno/mypapers/Delorme_BCITools10.pdf

Best,

Arno

On Sep 15, 2011, at 11:40 AM, ahmad hasanpour wrote:

> please help me my friends,i see  csp code in bci lab ,let me describe for you understand i get it; first create k fold with 10,and then take set of trials different for obtain good spatial filter?(i cant understand this section please describe it)
> 
> after u obtain good spatial filter u  apply it on test trails.
> 
> i do this steps on datasetIIIa but i cant get good result(2 classes).
> 
> cov1=cov(signals(1:400,:));        %Class 1
> cov2=cov(signals(803:1203,:));    %Class2
> 
> [W D]=eig(cov1,cov1+cov2);
> 
> filter=W(:,[1:3 56:59]);                % M first and end W
> 
> sig1=signals(1:400,:)*filter;
> 
> sig2=signals(803:1203,:)*filter;
>  log(var(sig1))
>  -4.2778   -3.6758   -2.9707   -0.1514   -0.1446   -0.1144   -0.0163
> 
> log(var(sig2))
>   -0.0140   -0.0257   -0.0526   -1.9627   -2.0050   -2.2249   -4.1225
> 
> sig3=signals(402:802,:)*filter;   %Class1  for Test
> log(var(sig3))
>  0.0388   -0.9152    0.1855   -0.2021   -0.0560   -0.8266   -1.8903
> 
> i dont have good result;why?
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