Dear SPM experts,
I would like to follow up on this issue of specifying the radius of sphere for PsTH.
I notice that there is a function line "function [xY, SPM, SPMfile] = my_regions(xY,SPM)" which should be able to specify the radius of sphere in the script of "getpsth".
So, I changed things as follows:
xY.def ='smooth'
xY.spec = 6
However, this does not change a thing.
Is there anyone figure out what to do with the "getpsth", if one wants to specify among the options of point, box, sphere?
Another thing is that I plotted the PSTH and found that the activation depicted by PSTH did not match the beta value or % signal change very well at the same coordinate. Could anyone tell me why they don't match? Is it because PSTH is from one single point in the coordinate? Do you think that it would improve if I plot PSTH from a sphere instead of a point?
Thanks!
Sincerely,
Veda
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