FIACH (version 0.1.2)

spmHrf: Canonical Haemodynamic Response Function.

Description

This function produces the impulse response for the canonical haemodynamic response function at a desired sampling rate.

Usage

spmHrf(RT, p = c(6, 16, 1, 1, 6, 0, 32))

Arguments

RT

RT is the desired sampling frequency. It must be specified in Hz(e.g. 1/16).

p

Default parameters for impulse response estimation identical to SPM's implementation.

Value

comp1

The first component of the list is the impulse response.

comp2

The second component are the parameters used to estimate it.

Examples

RT<-1/16
can.hrf<-spmHrf(RT)[[1]]
x<-seq(0,32,RT)
plot(x,can.hrf,lwd=7,col="red",type="l",
main="Canonical HRF",xlab="Time(seconds)",
ylab="Intensity(A.U.)")