rp: Realignment parameters
In tierneytim/FIACH: Retrospective Noise Control for fMRI

Realignment Parameters which do no have any obvious extreme movement despite severe image artefact.

data(rp)

A data frame with 104 observations on the following 6 variables.

V1: X Translation parameter
V2: Y Translation parameter
V3: Z Translation parameter
V4: Pitch
V5: Roll
V6: Yaw

data(rp)
z<-rp[,3]                                                     
dz<- c(0,diff(z))                                                
plot(1:104,dz,ylim=c(-1,1),main="Volume-Volume Displacement",   
xlab="Time(scans)",ylab="Displacement(mm)")
lines(1:104,dz,col="blue",lwd=3)
legend("topright",legend="dZ/dt Translation",lwd=3,col="blue")
arrows(54,.5,91,-.184)
text(48,.5,"-.184mm")