spmHrf: Canonical Haemodynamic Response Function.

In FIACH: Retrospective Noise Control for fMRI

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.

Author(s)

Tim Tierney

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.)")

Example output

FIACH 0.1.2: For the Graphical User Interface enter GUI() into the console
Warning messages:
1: no DISPLAY variable so Tk is not available 
2: loading Rplot failed 

FIACH documentation built on May 1, 2019, 8:02 p.m.