[Mne_analysis] writting raw fif files with mne_ex_read_write_raw

[sheraz at nmr.mgh.harvard.edu]

Hi Elisabeth,

If you want you can do eog or ecg clean in mne automatically using PCA, I
have matlab functions to do it.

Let me know if this is something intresting to you.

Sheraz

> Hello again
>
> The idea is to read first the raw original fif file with the structure
> Then change the data matrix (output of the reading) and replace it by raw
> data that have been ICA (removal of blink with SPM) and in the end write
> back the data. The ICA data are decomposed in 3 different sensors that we
> have to recombined into the appropriate matrix, this matrix should have
> the same size has the reading data..
> All that could be done smoothly if I can have all the data point (i.e use
> the option quantum = to - from +1) which seems not to work for the moment.
> Or may be am I using it incorrectly?
>
> Thanks for your answer
>
> Elisabeth
>
>
>
>
>
>
> -----Original Message-----
> From: Alexandre Gramfort [mailto:gramfort at nmr.mgh.harvard.edu]
> Sent: 20 April 2011 19:38
> To: Elisabeth Fonteneau
> Cc: mne_analysis at nmr.mgh.harvard.edu
> Subject: Re: [Mne_analysis] writting raw fif files with
> mne_ex_read_write_raw
>
> Hi Elisabeth,
>
> may I ask what you want to do at the end? crop your data?
>
> Alex
>
> On Wed, Apr 20, 2011 at 12:33 PM, Elisabeth Fonteneau
> <Elisabeth.Fonteneau at mrc-cbu.cam.ac.uk> wrote:
>> Hello MNE users,
>>
>>
>>
>> I am trying to use the function in the example mne_ex_read_write_raw.m
>>
>>
>>
>> It works, quite well if for infile and outfile I am using the same data
>>
>>
>>
>> My point is that with the option line 74/75
>>
>> quantum_sec=10
>>
>> quantum = ceil(quantum_sec*raw.info.sfreq)
>>
>>
>>
>> the data matrix does not have the same number of data point compared to
>> the
>> original and I am struggling to understand  what the conversion is
>>
>>
>>
>>
>>
>> I would like to read the raw data in one set  and
>>
>> I tried to use the line 79 instead
>>
>> quantum = to - from +1
>>
>>
>>
>> And for this option the data is written but if I try to open the fif
>> file
>> with mne_browse_raw
>>
>> it crashed with the following error message
>>
>>
>>
>> *** glibc detected *** free():invalid pointer: 0x006a4860***
>>
>> Abort
>>
>>
>>
>> I also try to change line 74/75 by
>>
>> quantum_sec=1000
>>
>> quantum = ceil(quantum_sec*raw.info.sfreq)
>>
>>
>>
>> and it crashed mne_browse_raw in the same way as previous
>>
>>
>>
>> Any suggestions are highly appreciated.
>>
>>
>>
>> Thanks and best wishes,
>>
>>
>>
>> Elisabeth
>>
>>
>>
>> **********************
>>
>> NEW CONTACT DETAILS
>>
>> **********************
>>
>>
>>
>> Dr Elisabeth Fonteneau
>>
>>
>>
>> Neurolex Group
>>
>> Department of Experimental Psychology
>>
>> University of Cambridge
>>
>> Downing Street
>>
>> Cambridge CB2 3EB
>>
>> England
>>
>> Phone: +44 1223 333 548
>>
>> Email: ef309 at cam.ac.uk
>>
>> Web: http://www.mrc-cbu.cam.ac.uk/people/elisabeth.fonteneau/
>>
>> **********************
>>
>>
>>
>>
>>
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