[FieldTrip] Problems plotting TFR with different frequency sacle

"Jörn M. Horschig" jm.horschig at donders.ru.nl
Thu Sep 20 14:46:17 CEST 2012


For those having similar problems, note that FieldTrip (actually 
Matlab's image function) cannot handle unequal axis, e.g. a data.freq 
may not be [1 2 3 4 5 10 15 20]. Therefore, ladies and gentlemen, let me 
introduce bug number 1729: http://bugzilla.fcdonders.nl/show_bug.cgi?id=1729

On 9/19/2012 4:07 PM, "Jörn M. Horschig" wrote:
> Hi Haiteng,
>
> I'm gonna drop by since you are in the office next door ;)
>
> Best,
> Jörn
>
> On 9/19/2012 3:39 PM, Haiteng Jiang wrote:
>> Dear  Fieldtripers ,
>>     I  try to plot  the TFR with Fieldtrip , but I find the frequency 
>> shift in the  plotting when I use different frequency scale. Please 
>> see the attached two examples (4-30Hz versus 4-100Hz).  The TFR 
>> within 4-30Hz is centered in alpha band while it is switched to beta 
>> band with the 4-100Hz. scale . Regarding to the TFR,   I calculate it 
>> by using an adaptive sliding time window of four cycles length (?t = 
>> 4/f) and a Hanning taper for lower frequencies (4--30 Hz), and a 
>> sliding time window of fixed length (200ms) and three orthogonal 
>> Slepian tapers resulting in ±10 Hz smoothing (29) for higher 
>> frequencies (30--100 Hz).
>>    Any suggestion ?
>>    All the best,
>>     Haiteng
>> -- 
>> Haiteng Jiang
>> PhD candidate
>> Neuronal Oscillations Group
>> Donders Institute for Brain, Cognition and Behaviour
>> Centre for Cognitive Neuroimaging
>> Radboud University Nijmegen
>>
>> Visiting address
>> Room 2.32
>> Donders Centre for Cognitive Neuroimaging
>> Kapittelweg 29
>> 6525 EN  Nijmegen
>> the Netherlands
>>
>>  Tel.: +31 (0)243668291 <tel:%2B31%20%280%29243668291>
>>  Web: https://sites.google.com/site/haitengjiang/
>>
>>
>>
>> _______________________________________________
>> fieldtrip mailing list
>> fieldtrip at donders.ru.nl
>> http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
>
>
> -- 
> 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
>
> P.O. Box 9101
> NL-6500 HB Nijmegen
> The Netherlands
>
> Contact:
> E-Mail:jm.horschig at donders.ru.nl
> Tel:    +31-(0)24-36-68493
> Web:http://www.ru.nl/donders
>
> Visiting address:
> Trigon, room 2.30
> Kapittelweg 29
> NL-6525 EN Nijmegen
> The Netherlands
>
>
> _______________________________________________
> fieldtrip mailing list
> fieldtrip at donders.ru.nl
> http://mailman.science.ru.nl/mailman/listinfo/fieldtrip


-- 
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

P.O. Box 9101
NL-6500 HB Nijmegen
The Netherlands

Contact:
E-Mail: jm.horschig at donders.ru.nl
Tel:    +31-(0)24-36-68493
Web: http://www.ru.nl/donders

Visiting address:
Trigon, room 2.30
Kapittelweg 29
NL-6525 EN Nijmegen
The Netherlands

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