[Eeglablist] Effect of anti-aliasing low-pass filter on connectivity analysis

Vito De Feo vito.defeo at zmnh.uni-hamburg.de
Mon Jun 22 09:31:02 PDT 2015


Dear Makoto,
this will not affect the connectivity analysis if the frequency of interest are far from the Nyquist frequency. For example if you downsample to 500 Hz (Nyquist freq = 250 Hz) you will have no problem in the band 0-100 Hz.
Best
Vito

Il giorno 20/giu/2015, alle ore 00:28, Makoto Miyakoshi ha scritto:

> Dear List,
> 
> If I use zero-phase low-pass filter for anti-aliasing, does it affect the subsequent connectivity analysis? I ask this because EEGLAB pop_resample() automatically applies it. If it does, is there a workaround? Should I use minimum phase causal filter for anti-aliasing?
> 
> -- 
> Makoto Miyakoshi
> Swartz Center for Computational Neuroscience
> Institute for Neural Computation, University of California San Diego
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