[Mne_analysis] TFCE parameters

[Natalie Klein]

Hi Cody, it might help to read this paper on TFCE:

Smith, S. M., & Nichols, T. E. (2009). Threshold-free cluster enhancement:
Addressing problems of smoothing, threshold dependence and localisation in
cluster inference. *NeuroImage*, *44*(1), 83–98.
http://doi.org/10.1016/j.neuroimage.2008.03.061

The definition of TFCE in equation (1) is an integral, with range "start"
to the height at a given point; in software, this is simply approximated as
a sum, so you choose the "start" (typically 0 makes sense) and then the
step for how many discrete steps to choose to approximate the integral as a
sum. I think the paper is very helpful for getting the intuition.




On Mon, Jul 18, 2016 at 10:02 AM, Cushing, Cody <CCUSHING1 at mgh.harvard.edu>
wrote:

> Hi all,
>
> My apologies if the documentation exists somewhere and I am just unable to
> find it, but what do the start/step parameters when using TFCE explicitly
> control?  I couldn't find much in the manual or the archives.
>
> Cheers,
> Cody
>
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