R/gammaHRF.R

In NeuroStat/neuRosim: Functions to Generate fMRI Data Including Activated Data, Noise Data and Resting State Data

Defines functions gammaHRF

Documented in gammaHRF

gammaHRF <-
function(x, FWHM=4, verbose=TRUE){

	th <- 0.242*FWHM
	
	1/(th*factorial(3)) * (x/th)^3 * exp(-x/th)
}