Gamma HRF (hemodynamic response function)

The hrf_gamma function computes the gamma density-based HRF (hemodynamic response function) at given time points t.

Usage

hrf_gamma(t, shape = 6, rate = 1)

Arguments

t

A vector of time points.

shape

A numeric value representing the shape parameter for the gamma probability density function. Default value is 6.

rate

A numeric value representing the rate parameter for the gamma probability density function. Default value is 1.

Value

A numeric vector representing the gamma HRF at the given time points t.

See also

Other hrf_functions: hrf_bspline(), hrf_gaussian(), hrf_inv_logit(), hrf_mexhat(), hrf_sine(), hrf_spmg1(), hrf_time()

Examples

# Compute the gamma HRF representation for time points from 0 to 20 with 0.5 increments
hrf_gamma <- hrf_gamma(seq(0, 20, by = .5), shape = 6, rate = 1)