[Eeglablist] EEG.event.latency

[Delorme, Arnaud]

Hi Tim,

This is because sample 1 is time 0 in Matlab

(3179.5216….-1)/12.7140 = 250

Best wishes,

Arno

> On Apr 4, 2020, at 3:56 PM, Tim Curran <tim.curran at colorado.edu> wrote:
> 
> I have a question about EEG.event latencies. A & B below show my first three events in samples (A) and sec (B) according to EEGLAB.  My actual sampling rate is correctly stored as EEG.srate = 250 samples/sec
> 
> A = EEG.event(1:3).latency (in samples)
> B = latency values reported by the GUI:  Edit Event values (in sec)
> C = A/B (samples per sec)
> 
> 	A			B			C
> 1	3179.5216	12.7140		250.0804
> 2	3221.2710	12.8810		250.0793
> 3	3262.7715	13.0470		250.0783
> 
> … so why are my calculated sampling rates ~250.08 (C) rather than 250.00?
> 
> This matters to me because I am trying to add new events with EEG = pop_editeventvals, which takes latency values in sec, but does not seem to store them correctly based on 250 samples/sec.
> 
> thanks
> Tim
> 
> 
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