simtb_makeMotParams() - Generates motion time series
Uses an AR(1) process (with fixed parameter at p=0.95)
to generate translation in x and y directions and rotation.
Usage:
>> mp = simtb_makeMotParams(nT, dev, MAX_TRANS, MAX_ROT)
INPUTS:
nT = number of TRs (time points)
dev = [1 x 3] vector of standard deviations of Gaussian deviates for [x-trans, y-trans, rotation]
MAX_TRANS = furthest from 0 that x or y translation should get
(based on simulations: dev=1 and p=0.95 gives max translation of roughly 10 pixels)
MAX_ROT = similar to MAX_TRANS but for rotation in degrees
OUTPUTS:
mp = [nT x 3] matrix of motion time series (x-pos, y-pos, rotation)
x-pos and y-pos are in units of voxels
rotation is in units of degrees
see also: simtb_addMotion()