eigen values - extract rois signals

Submitted by saikar on Wed, 09/17/2014 - 18:05

Hi All,


 


I want to extract ROI signals using DPARSF, but the eigen values instead of the mean values of the ROIs.


Is there a way to extract eigen values in DPARSF?


Thanks,


Sai

Forums:

YAN Chao-Gan

Wed, 09/17/2014 - 18:39

Hi Sai,

Line 208:

SeedSeries{1,iROI} = mean(AllVolume(:,find(MaskROI)),2);


Change mean -> eig
to have a try.

Hope this helps.

Best,

Chao-Gan



saikar

Wed, 09/17/2014 - 18:59






I tried that once , it did not work . I am running it again to see if it runs this time. Thanks for the reply, I will keep you posted on the outcome.

 

sai

 

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Subject: Re: [RFMRI] eigen values - extract rois signals

 

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Commented by YAN Chao-Gan (YAN Chao-Gan)

Hi Sai,

 

Line 208:

 

           
SeedSeries{1,iROI}
= mean(AllVolume(:,find(MaskROI)),2
);

 

 

Change mean -> eig

to have a try.

 

Hope this helps.

 

Best,

 

Chao-Gan

 

 

saikar

Wed, 09/17/2014 - 19:28

 Hi Chao-Gan,

I tried it again and here is the error that I get,

??? Error using ==> eig
Matrix must be square.

YAN Chao-Gan

Wed, 09/17/2014 - 19:49

Sorry, my bad, you should use something like 

Line 104:

[U S V] = svd(AllVolume,'econ');
PCs = U(:,1:PCNum);


Hope you know some programming.

Best,

Chao-Gan




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