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<html><head></head><body><div style="font-size: 12pt; font-family: Calibri,sans-serif;"><div>Hi Tom</div><div><br></div><div>Great! That would be really helpful, thank you. I'm still learning fieldtrip so it be interesting to see how it works. The ft_statistics_montecarlo function implies that a custom statistic of choice can be used but I haven't looked deep enough into the function yet to get a could understanding of it.</div><div><br></div><div>If anything publishable comes out of it I can acknowledge you if you wish?</div><div><br></div><div>Best wishes</div><div>Chris </div><div><br></div><div>Dr Christopher Brown</div><div>Research Associate</div><div><br></div><div>Sent from a mobile device, please excuse my brevity.</div><br><div id="htc_header">----- Reply message -----<br>From: "Marshall, T.R. (Tom)" <t.marshall@fcdonders.ru.nl><br>To: "FieldTrip discussion list" <fieldtrip@science.ru.nl><br>Subject: [FieldTrip] Cluster analysis on correlation statistics<br>Date: Sat, Dec 6, 2014 15:33</div></div><br><pre style="word-wrap: break-word; white-space: pre-wrap;">Hi Chris,
I wrote some functions for doing this a while ago and would be happy to share them.
Re: t stat vs r - as I understand it you can permute any statistic you want, it doesn't have to be a t or f. The montecarlo method for solving the multiple comparisons problem is not dependent on your choice of statistic (right guys?).
Best,
Tom
________________________________________
From: fieldtrip-bounces@science.ru.nl [fieldtrip-bounces@science.ru.nl] on behalf of Dr C A Brown [cb802@cam.ac.uk]
Sent: 06 December 2014 12:33
To: fieldtrip@science.ru.nl
Subject: Re: [FieldTrip] Cluster analysis on correlation statistics
Hello again,
Just to clarify my last email: I'm referring to correlation between either single trial data within subject, or averaged ERPs across subjects, with a behavioral variable. Not linear regression across conditions as is already implemented in the ft_statfun_depsamplesregrT function.
Many thanks
Chris
Dr Christopher Brown
Research Associate
Sent from a mobile device, please excuse my brevity.
----- Reply message -----
From: "Christopher Brown" <cb802@cam.ac.uk>
To: <fieldtrip@science.ru.nl>
Subject: Cluster analysis on correlation statistics
Date: Sat, Dec 6, 2014 07:49
Dear all
I would like to use the cluster analysis functions in Fieldtrip on correlation statistics. I note there has been some discussion about this on this list in the past but I haven't come across the necessary ft_statfun_corr function to allow this analysis. It would be great if somebody has this code and could share it with me; otherwise, I will embark on writing it myself and sharing my results with everyone for feedback. Being new to Fieldtrip I would greatly appreciate any collaborative help with this. May I check my understanding on something before getting started: To allow for multiple comparisons correction using monte carlo for example, as part of a cluster analysis, I presume the output of the function must be t values rather than correlation coefficients? Any other hints as to how to write this are most welcome.
Kind regards
Chris
--
Dr Christopher Brown
Research Associate | CamPain Group | Division of Anaesthesia | School of Clinical Medicine | University of Cambridge
Box 93
Addenbrooke's Hospital
Hills Road
Cambridge CB2 0QQ
01223 256 995
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