[FieldTrip] Mismatch between cluster activation and * marks

[Sanjeev Nara]

Hi Fieldtrip Experts


Apologies for a long mail. I have a experiment where i have 20 subjects which have performed 2 different tasks. I want to implement a cluster based permutation test for compare the Time frequency analysis in two different conditions. I a following this tutorial for computing the stats http://www.fieldtriptoolbox.org/tutorial/cluster_permutation_freq  . 

I have computed the stats using ft_freqstatistics by providing input a 4 D matrix which has size (20 subjects * 102 channels * 70 frequency bins * 190 time points ). The analysis give me positive and negative clusters. 

I want to plot first positive and negative cluster in terms of channels which are significant during a specifies frequency range (say 12 - 30 ) in a specified  time range. 


After that i use ft_descriptive on difference of powerspectrum in both conditions. I am plotting the cluster within a specified time and frequency duration computed from first positive and negative cluster. The problem is i am getting topoplots which have a difference in the colour activation and the ' * ' marks. I have attached few plots to show what is the issue. The image img1_correct and img2_correct shows the match between activations and ' * ' marks whereas the img1_incorrect and img2_incorrect shows the mismatch.

I shall be thankful if you could please help me debugging the issue. 


Best regards 
Sanjeev   

 

Sanjeev Nara
Predoctoral Researcher BCBL
www.bcbl.eu
https://sites.google.com/view/sanjeev-nara/
Tel: +34 943 309 300 (ext 314)
Legal disclaimer/Aviso legal/Lege-oharra: www.bcbl.eu/legal-disclaimer
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