Derivative method for SPMG1 HRF

Uses the analytic derivative formula for the SPM canonical HRF.

Usage

# S3 method for class 'SPMG1_HRF'
deriv(x, t, ...)

Arguments

x

An SPMG1_HRF object

t

Numeric vector of time points at which to evaluate the derivative

...

Additional arguments (currently unused)

Value

Numeric vector of derivative values