[Eeglablist] problem when importing EDF file into EEGLAB - only loads the first 0.5 seconds
arno at ucsd.edu
Fri Aug 3 13:28:43 PDT 2012
what happens if you leave the time range empty. It should import the whole file, no?
On Aug 3, 2012, at 2:34 AM, Neal Hinvest wrote:
> I am an EEGLAB novice and am having an issue when importing an EDF file
> into EEGLAB. The original file is 2781 seconds long but when I load the
> EDF file into EEGLAB it only loads the first 0.556 seconds.
> When I import the file I specify that the data range in seconds [0
> 2781]. I deselect "extract event" as I am going to import events using a
> .txt file. I select "import continuous data" as data gathering was
> continuous. When I click OK the correct number of channels is displayed,
> Frames per epoch are 2781. But the epoch start and end are 0 and 0.556
> respectively. When I load in my .txt file with my events the events in
> the file are then outside the boundaries of the waveform file.
> I receive the following errors when I import the EDF file:
> Reading data file header...
> WARNING SOPEN(EDF): Physical Max/Min values of EDF data are not
> necessarily defining the dynamic range.
> Hence, OVERFLOWDETECTION might not work correctly. See also EEG2HIST
> and read
> http://dx.doi.org/10.1016/S1388-2457(99)00172-8 (A. Schlögl et al.
> Quality Control ... Clin. Neurophysiol. 1999, Dec; 110(12): 2165 - 2170).
> A copy is available here, too:
> Reading data in EDF format...
> Warning SREAD: NoS yields non-integer position [0.555800, 5000.000000]
> eeg_checkset note: upper time limit (xmax) adjusted so
> (xmax-xmin)*srate+1 = number of frames
> Creating a new ALLEEG dataset 1
> The first warning I do not need to worry about taking on board what
> others have posted but I am unsure as to what the second warning, which
> appears to be the critical one, is referring to.
> Any help would be greatly appreciated.
> Neal Hinvest
> Dr Neal Hinvest
> University of Bath
> BA2 7AY
> United Kingdom
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