[Eeglablist] Regarding PACT

[Makoto Miyakoshi]

Dear Koji,

I tried it but could not replicate the problem. I used Matlab 2014b, EEGLAB
13.x, PACT0.17.

>From your log,

> pop_eegfiltnew() - performing 425 point bandpass filtering.

This does not make sense to me. Looks like your sampling rate is very low,
must be around 100Hz? Because the default amplitude frequency cutoff is
100Hz (i.e. amplitude of > 100Hz will be analyzed), your sampling rate
should be much higher than 100Hz.

PACT assumed that the input is ECoG data, which is usually sampled at >=
1000Hz. Please try the data with much higher sampling rate (or upsampling
your data to see if it fixes the problem.)

Makoto


On Mon, Apr 27, 2015 at 4:27 PM, 井澤考史 <ko.izawa at gmail.com> wrote:

> Dear EEGLAB and PACT team,
>
> I’m trying to learn the PACT by using eeglab_data.set. But I met some
> errors as follows. Could you provide any opinion to me?
>
> My Operation
> - Loaded dataset.
> - Launched "Compute PAC” GUI.
> - No change all parameters value form default and press OK.
>
> pop_eegfiltnew() - performing 425 point bandpass filtering.
> pop_eegfiltnew() - transition band width: 1 Hz
> pop_eegfiltnew() - passband edge(s): [1 2] Hz
> pop_eegfiltnew() - cutoff frequency(ies) (-6 dB): [0.5 2.5] Hz
> pop_eegfiltnew() - filtering the data (zero-phase)
> firfilt(): |====================| 100%, ETE 00:00
> Error using pop_eegfiltnew (line 148)
> Cutoff frequency out of range
>
> Error in pac_man (line 181)
> EEG_highFreqAmp   = pop_eegfiltnew(EEG, hfoAmp(1),   hfoAmp(end));
>
> Error in pac_pop_main (line 145)
> EEG = pac_man(EEG, options{:});
>
> Error while evaluating uimenu Callback
>
>
> Best regards,
> Koji
>
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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