specifydesign: Generate design matrix.

In neuRosim: Simulate fMRI Data

Generate design matrix.

Description

Generates a design matrix to be used as a model for the simulated activation.

Usage

specifydesign(onsets, durations, totaltime, TR, effectsize, accuracy=0.1, 
	conv = c("none", "gamma", "double-gamma", "Balloon"), 
	cond.names = NULL, param = NULL)

Arguments

onsets	List or vector representing the onsets in seconds.
durations	List or vector representing the durations in seconds.
totaltime	Duration of the experiment in seconds.
TR	Repetition time in seconds.
effectsize	List or number representing the effectsize in each condition.
accuracy	Microtime resolution in seconds.
conv	Should the design matrix be convoluted, default is none.
cond.names	Optional names for the conditions.
param	Parameters of the haemodynamic response function. See gammaHRF and canonicalHRF for more details.

Value

A matrix specifying the design.

Author(s)

M. Welvaert

See Also

specifyregion,gammaHRF,canonicalHRF,balloon

Examples

os <- list(c(20,60),c(15,35))
d <- list(20, 10)
total <- 80
TR <- 2
out <- specifydesign(os, d, total, TR, effectsize=list(2,5), conv="double-gamma")

neuRosim documentation built on Oct. 18, 2023, 5:09 p.m.