[FieldTrip] error when converting from spm to ft

Thu Nov 15 19:57:21 CET 2012

awesome! thank you Duncan:)

Thanks everyone for all the suggestions!!

On Thu, Nov 15, 2012 at 6:24 PM, Duncan Astle <
Duncan.Astle at mrc-cbu.cam.ac.uk> wrote:

>  Word up Zita,****
>
> ** **
>
> Try this(replacing the filename for the file you want): ****
>
> ** **
>
> D1 = spm_eeg_load('/imaging/as05/EEG
> data/Load3Easy_TF/wmrtf_efMMspm8_raw_0001');****
>
> l3e1=D1.fttimelock;****
>
> l3e1.dimord='chan_freq_time';****
>
> l3e1.powspctrm = squeeze(D1.fttimelock.powspctrm);****
>
> ** **
>
> Extra tip: you first need to separate your conditions such that you have
> an SPM file for each subject for each condition……..****
>
> ** **
>
> Let me know how you get on,****
>
> D.****
>
> ________________________________________________****
>
> Dr. Duncan Astle,****
>
> Programme Leader Track,****
>
> British Academy Research Fellow,****
>
> MRC Cognition and Brain Sciences Unit,****
>
> Chaucer Road,****
>
> Cambridge.****
>
> Duncan.Astle at mrc-cbu.cam.ac.uk****
>
> ** **
>
> *From:* fieldtrip-bounces at science.ru.nl [mailto:
> fieldtrip-bounces at science.ru.nl] *On Behalf Of *Zita Eva Patai
> *Sent:* 15 November 2012 17:04
> *To:* FieldTrip discussion list
> *Subject:* Re: [FieldTrip] error when converting from spm to ft****
>
> ** **
>
> Dear Jörn,****
>
> ** **
>
> Thank you for the quick reply. I will try your suggestion!****
>
> ** **
>
> Many thanks,****
>
> z****
>
> On Thu, Nov 15, 2012 at 2:55 PM, "Jörn M. Horschig" <
> jm.horschig at donders.ru.nl> wrote:****
>
> Dear Zita,
>
> The function seems to convert the function not correctly to a freq
> datastructure - it seems more like raw data to me.
>
> freq data requires a .powspctrm field, which should be a matrix of
> observations x channels x freq x time. So you would need to use cell2mat on
> your .trial field. Probably you need to permute the dimensions to match
> this order. Additionally, you will need a .dimord field which which should
> be 'rpt_chan_freq_time' and you need a .freq field that contains the
> frequencies in that matrix. Please first make sure that your trials
> actually have 3 dimensions, else something else in the conversion went
> wrong.
>
> I don't use SPM so no clue if there is a better way than doing it manually.
>
> Best,
> Jörn****
>
>
>
> On 11/14/2012 6:32 PM, Zita Eva Patai 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.****
>
>
> ****
>
> ** **
>
> -- ****
>
> ** **
>
> Zita Patai****
>
> DPhil, Experimental Psychology****
>
> University of Oxford****
>
> bcl.psy.ox.ac.uk/people/zita-eva-patai/****
>
> ** **
>
> ** **
>
> ** **
>
> _______________________________________________****
>
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>
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>
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>
>
>
>
> ****
>
> -- ****
>
> Jörn M. Horschig****
>
> PhD Student****
>
> Donders Institute for Brain, Cognition and Behaviour ****
>
> Centre for Cognitive Neuroimaging****
>
> Radboud University Nijmegen ****
>
> Neuronal Oscillations Group****
>
> FieldTrip Development Team****
>
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>
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>
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>
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>
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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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-- 

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