[FieldTrip] Cluster analysis on correlation statistics

[Tom Marshall]

Hm... it seems that I may have reinvented the wheel (or perhaps invented 
a cruder wheel before Eric and co provided this more streamlined one).

Eric, can indepsamplesregrT also compute nonparametric correlation 
coefficients (eg Spearman)?

Best,
Tom

On 12/8/2014 3:56 PM, Maris, E.G.G. (Eric) wrote:
> Hi Chris,
> 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.
> For correlating/regressing single trial data of a single subject, you 
> use the ft_statfun_indepsamplesregrT (with the units-of-observations 
> being the trials, which each correspond to one column of your design 
> matrix).
> For correlating/regressing subject-averaged data of a group of 
> subjects, you also use the ft_statfun_indepsamplesregrT (with the 
> units-of-observations being the subjects, which each correspond to one 
> column of your design matrix).  Note, in this case your behavioral 
> data (accuracy or RT) or also subject averages.
> Best,
> Eric Maris
> ------------------------------------------------------------------------
> *Van:* Dr C A Brown [cb802 at cam.ac.uk]
> *Verzonden:* zaterdag 6 december 2014 12:33
> *Aan:* fieldtrip at science.ru.nl
> *Onderwerp:* 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 at cam.ac.uk>
> To: <fieldtrip at 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
>
>
> _______________________________________________
> fieldtrip mailing list
> fieldtrip at donders.ru.nl
> http://mailman.science.ru.nl/mailman/listinfo/fieldtrip

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.science.ru.nl/pipermail/fieldtrip/attachments/20141208/3cd1adcc/attachment.html>