notch filter

Submitted by Pablo on Mon, 12/16/2013 - 17:02

 Hi all,
I have an artifact in my data that is very sharp in frequency, I think a notch filter would be ideal to remove it. Is there any notch filter implemented in rest? if not, Could anyone suggest an alternative approach?

thanks

Pablo
 

Submitted by ZHANG_RESTadmin on Fri, 12/27/2013 - 09:19

rest does not have a notch filter currently.  but, if your sharp spike in frequency occured out of the freuqncey band of resitng-state (i.e., 0.01-0.08 Hz), i think you can remove it by using band pass filtering with frequency parameter from 0.01-0.08.  because the frequency component which is below 0.01 Hz or higher than 0.08 Hz will be removed.