[FieldTrip] ROI midpoint

Roey roeysc at gmail.com
Sun Nov 16 06:32:58 CET 2014

Dear Azeez,
It depends on whether you want an actual point (whose activity you want to use, for example) or just an (x,y,z) coordinate.

In the latter case you could go over all the point of a given ROI in the atlas, and compute the mean of their x value, the mean if their y value and the mean of their x value (notice that you know which coordinate system you're using, e.g. SPM).

If you want an actual point that resides on the atlas grid, you can then find the point closest to the point you computed above (for example, you could use the marlab function "norm" on the difference between the two points, which would be represented as vectors).

I'm not sitting in front of fieldtrip at the moment, so hopefully this made sense to you.


‫ב-16 בנוב׳ 2014, בשעה 02:29, ‏‏Azeez Adebimpe ‏<ayobimpe2004 at hotmail.com> כתב/ה:‬

> Dear experts,
> please how can I identify the midpoint of  each of the region of AAL atlas. 
> thank you
> Azeez A. Adebimpe
> "Knowledge and good manner, the beauty of a man"
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> fieldtrip mailing list
> fieldtrip at donders.ru.nl
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