[Mne_analysis] "mne_process_raw" vs "mne_raw2mat" sample # mismatch

[Alexandre Gramfort]

Hi Matt,

glad this solved the pb. The current choice makes the content of event files
and the output of mne_raw2mat consistent which is I feel a good behavior.

Alex

On Mon, Aug 8, 2011 at 2:00 PM, Matt Panichello
<panichem at nmr.mgh.harvard.edu> wrote:
> Hi Alex,
> data.first_sample does equal the mismatch; this means that the difference in
> sample numbering is due to whether or not the "initial skip" is taken into
> account, correct? Are there any flags which allow mne_fiff2mat be modified
> so that it doesn't exclude this initial skip? (I didn't see anything in the
> help.)
> If not, I can just use the data.first_sample value to convert between the
> two numberings as needed.
> Thanks a lot,
> Matt
>
> On Fri, Aug 5, 2011 at 10:01 PM, Alexandre Gramfort
> <gramfort at nmr.mgh.harvard.edu> wrote:
>>
>> Hi Matt,
>>
>> can you run fiff_setup_read_raw on the raw data and look if the #
>> mismatch is equal to the first_samp in the output structure ?
>>
>> data = fiff_setup_read_raw('data_raw.fif')
>> data.first_samp
>>
>> Alex
>>
>> On Fri, Aug 5, 2011 at 3:44 PM, Matt Panichello
>> <panichem at nmr.mgh.harvard.edu> wrote:
>> > Hello,
>> > I am reading raw data into matlab using mne_raw2mat. For the files I
>> > have
>> > read in, I have noticed a mismatch between the sample numbering in the
>> > resulting matlab structure and the sample numbering in the event file
>> > produced mne_browse_raw.
>> > For example, a particular trigger value (3) first appears at column
>> > number
>> > 64,016 in my MNE_raw.data structure in the STI 14 row, while it is
>> > listed at
>> > sample 72,415 in the event file produced by mne_browse_raw.
>> >
>> > Does anyone have any idea what the source of the sample # mismatch could
>> > be?
>> > I tried manipulating the "keep initial skip" option in mne_browse_raw
>> > but
>> > this didn't seem to make any difference in the event file output.
>> > Thanks,
>> > Matt
>> >
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>
>
> --
> Matthew Panichello
> Research Coordinator, Cognitive Neuroscience Laboratory
> Massachusetts General Hospital
> Phone: 617-726-0308
>