[FieldTrip] converting from som to ft

[Zita Eva Patai]

Thanks Vladimir!
(but does this mean I cannot convert my TF data at all, or i have to do
this as a 'loophole' alternative...and then i get my TF data into the right
format?)

On Thu, Nov 15, 2012 at 4:37 PM, Vladimir Litvak
<litvak.vladimir at gmail.com>wrote:

> Dear Zita,
>
> You do:
>
> freq = D.fttimelock
>
> in SPM. The fieldtrip function does not support TF data.
>
> Best,
>
> Vladimir
>
>
> On Thu, Nov 15, 2012 at 4:29 PM, Zita Eva Patai <eva.patai at psy.ox.ac.uk>wrote:
>
>> Hello FT-ers
>>
>> In the past i had no problem when converting my data from SPM (where i do
>> preprocessing and averaging) to FT (where I do my cluster-stats and
>> plotting)
>>
>> Currently, I am using the new way to convert (previous version seems
>> outdated 'nspm2ftrip') and I am hitting a wall: it says my data is not in
>> the right format, ie: not freq data. But i know that it is...any advice
>> would be much appreciated! Not to mention is warns me my data is not
>> epoched when it is indeed so...
>>
>> Thank you!
>> zita
>>
>> *********************
>> *>> D = spm_eeg_load*
>> SPM M/EEG data object
>> Type: evoked
>> Transform: TF
>> 8 conditions
>> 326 channels
>> 20 frequencies
>> 501 samples/trial
>> 8 trials
>> Sampling frequency: 250 Hz
>> Loaded from file  C:\Users\Eva Z
>> Patai\Documents\MATLAB\epoched_data\tf\rmtf_rs01_timecorr.mat
>>
>> Use the syntax D(channels, frequencies, samples, trials) to access the
>> data
>> Type "methods('meeg')" for the list of methods performing other
>> operations with the object
>> Type "help meeg/method_name" to get help about methods
>>
>> *>> data = spm2ft(D)*
>>
>> mapping condition label "11" to condition code 1
>> mapping condition label "12" to condition code 2
>> mapping condition label "21" to condition code 3
>> mapping condition label "22" to condition code 4
>> mapping condition label "31" to condition code 5
>> mapping condition label "32" to condition code 6
>> mapping condition label "41" to condition code 7
>> mapping condition label "42" to condition code 8
>>
>> data =
>>
>>       fsample: 250.0000
>>         label: {326x1 cell}
>>          time: {1x8 cell}
>>         trial: {1x8 cell}
>>     trialinfo: [8x1 double]
>>           cfg: [1x1 struct]
>>
>>
>> *>> data2 = ft_checkdata(data, 'datatype', 'freq')*
>>
>> Warning: the data does not contain a trial definition, assuming that the
>> trials are consecutive segments of a continuous recording
>> > In utilities\private\warning_once at 81
>>   In utilities\private\fixsampleinfo at 54
>>   In ft_datatype_raw at 91
>>   In ft_checkdata at 170
>> Error using ft_checkdata (line 288)
>> This function requires freq data as input.
>>
>>
>>
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>>
>
>
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-- 

Zita Patai
DPhil, Experimental Psychology
University of Oxford
bcl.psy.ox.ac.uk/people/zita-eva-patai/
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