No subject

[Ingrid Nieuwenhuis]

Hi Frederic,

 

If you use the plotting functions in FieldTrip there are several ways to
plot the significant differences between conditions. In the topoplot
functions you can highlight the significant sensors (see help topoplot.m).
In the multiplot functions you can make use of opacity masking (see help
again). Set the data.mask field as cfg.maskparameter. Multiplying the raw
effect with the significance map is not recommended if you use the topoplot
functions, because interpolation takes place to fill in the space between
the channels. Setting channels to zero can create interpolation artifiacts.

 

See also the tutorials on the FieldTrip webpage for more information: 

http://www2.ru.nl/fcdonders/fieldtrip/doku.php?id=fieldtrip

 

Plotting clusters:

http://www2.ru.nl/fcdonders/fieldtrip/doku.php?id=fieldtrip:documentation:tu
torial:plotting#plotting_clusters

 

 In the Cluster-based permutation tests tutorial there is also information
about plotting the results

http://www2.ru.nl/fcdonders/fieldtrip/doku.php?id=fieldtrip:documentation:tu
torial:statistics#2.1_permutation_tests_for_time-locked_databetween-trials_e
xperiments

 

Good luck,

Ingrid

 

 

  _____  

From: FieldTrip discussion list [mailto:FIELDTRIP at NIC.SURFNET.NL] On Behalf
Of Frederic Roux
Sent: Friday, July 11, 2008 9:17 AM
To: FIELDTRIP at NIC.SURFNET.NL
Subject: [FIELDTRIP]

 

Hi Eric,

thank you for replying so fast. Your answer helped me a lot. I have on more
question: if I want to see significant differences between conditions I must
multiply the raweffect with a significance map?
This should look similar to this:
plotdata.powspctrm = clusrand.raweffect.*squeeze(clusrand.posclusterlabelmat
== 1);

Is that correct?

Regards,

Frederic




Dipl. Psych. Frederic Roux 

Max Planck Institut für Hirnforschung
Abteilung Neurophysiologie
Deutschordenstr. 46
60528 Frankfurt am Main

Tel.: 069 / 6301 83225
Mail: fredericroux at hotmail.de 
froux at mpih-frankfurt.mpg.de




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The aim of this list is to facilitate the discussion between users of the
FieldTrip toolbox, to share experiences and to discuss new ideas for MEG and
EEG analysis.

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http://www.ru.nl/fcdonders/fieldtrip/


----------------------------------
The aim of this list is to facilitate the discussion between users of the FieldTrip  toolbox, to share experiences and to discuss new ideas for MEG and EEG analysis. See also http://listserv.surfnet.nl/archives/fieldtrip.html and http://www.ru.nl/fcdonders/fieldtrip.
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