[FieldTrip] converting from som to ft

[Vladimir Litvak]

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 outdated 'nspm2ftrip') and I am hitting a wall: it says my data is not in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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