[FieldTrip] plotting clusters

[mubeen afzal]

Hi Stephen,

Thank you for the reply. Thats helpful.

Regards,
Mubeen J
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From: Stephen Whitmarsh <stephen.whitmarsh at gmail.com>
Sent: Tuesday, March 29, 2022 1:26 PM
To: FieldTrip discussion list <fieldtrip at science.ru.nl>
Cc: mubeen afzal <mubafzal at hotmail.com>
Subject: Re: [FieldTrip] plotting clusters

Hi Mubeen,

The cfg.foi field specifies the frequency range in Hz, so the first option you mention.

This is described in the header of the function ft_selectdata, where you can always find a clear description of the input/output of FieldTrip functions:
% cfg.frequency = scalar or string, can be 'all', or [beg end], specify frequency range in Hz

Cheers,
Stephen

On Tue, 29 Mar 2022 at 10:55, mubeen afzal via fieldtrip <fieldtrip at science.ru.nl<mailto:fieldtrip at science.ru.nl>> wrote:
Thanks Jan will do. Can I ask if the specification of avgoverfrequency actually averages powspctrm values in all frequency bins if foi is [2 6] or looks at only 4hz the average of 2+6/2. The output says 1 frequency bin and stat.freq shows 4 in output when aevraging is done meaning does it only look at 4Hz frequency?

Regards
Mubeen J



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From: fieldtrip <fieldtrip-bounces at science.ru.nl<mailto:fieldtrip-bounces at science.ru.nl>> on behalf of Schoffelen, J.M. (Jan Mathijs) via fieldtrip <fieldtrip at science.ru.nl<mailto:fieldtrip at science.ru.nl>>
Sent: Tuesday, March 29, 2022 6:07:37 PM
To: FieldTrip discussion list <fieldtrip at science.ru.nl<mailto:fieldtrip at science.ru.nl>>
Cc: Schoffelen, J.M. (Jan Mathijs) <janmathijs.schoffelen at donders.ru.nl<mailto:janmathijs.schoffelen at donders.ru.nl>>
Subject: Re: [FieldTrip] plotting clusters

Hi Mubeen,

@1 and @2: Perhaps you can start by studying the documentation on internet:


https://www.fieldtriptoolbox.org/tutorial/cluster_permutation_timelock/<https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.fieldtriptoolbox.org%2Ftutorial%2Fcluster_permutation_timelock%2F&data=04%7C01%7C%7C9e42a1add7a6406cd0a208da116ea812%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637841464211547890%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=IhQKSIPiPWhFeba%2BPIUZSnsDkWdBey0%2BbENIDbLIuCg%3D&reserved=0>

The output data object is quite extensively described.

@3: the error message is quite clear I think, so the answer would be ’no’, unless you squeeze out either the frequency or time dimension. This can be done with ft_selectdata, and an appropriate specification of the input cfg. Please refer to the function’s help to get you on the way.

Best wishes,
Jan-Mathijs


On 28 Mar 2022, at 17:20, mubeen afzal via fieldtrip <fieldtrip at science.ru.nl<mailto:fieldtrip at science.ru.nl>> wrote:

Hi fieldtrip team,

I would like to know how to learn more on cluster permutation performed on two groups.

  1.  what do positive and negative clusters represent
  2.  what is posclusterslabelmat represent
  3.  is there a way to plot positive clusters after wavelet analysis comparisons between two groups without specifying time or frequency as I am getting this error message: 'this only works if either frequency or time is a singleton dimension'

my data currently is comparing frequencies between 2 and 6 Hz for time segments 0:0.2:5 seconds across 19 channels in two groups

Thanks for any help
Mubeen
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