Re: [Freesurfer] Non-linear correlations

2010-08-02 Thread Douglas N Greve
There is nothing to fit nonlinear parameters. You can do some simpling things. Eg, if you believe that thickness is changing exponentially with time, th = exp(-a/t), then you can take the log of the thickness so that log(th) = -a/t, then fit for a. doug mmoayedi wrote: Hi Everyone, I was

[Freesurfer] Non-linear correlations

2010-07-31 Thread mmoayedi
Hi Everyone, I was wondering if there's a method to examine non-linear correlations in FreeSurfer. Specifically, I'd like to use a behavioural correlate and see if there are any correlations in the cortex. The linear correlation wasn't as fruitful as I'd hoped, but there is evidence that a