afni_hrf: construct an native AFNI hrf specification for '3dDeconvolve'...

In bbuchsbaum/fmrireg: R package for the anlysis of fmri data

construct an native AFNI hrf specification for '3dDeconvolve' with the 'stim_times' argument.

Description

construct an native AFNI hrf specification for '3dDeconvolve' with the 'stim_times' argument.

Usage

afni_hrf(
  ...,
  basis = c("spmg1", "block", "dmblock", "tent", "csplin", "poly", "sin", "sine", "gam",
    "gamma", "spmg2", "spmg3", "wav"),
  onsets = NULL,
  durations = NULL,
  prefix = NULL,
  subset = NULL,
  nbasis = 1,
  contrasts = NULL,
  id = NULL,
  lag = 0,
  precision = 0.3,
  summate = TRUE,
  start = NULL,
  stop = NULL
)

Arguments

...	Variables to include in the HRF specification
basis	Character string specifying the basis function type
onsets	Numeric vector of event onset times
durations	Numeric vector of event durations
prefix	Character string prefix for the term
subset	Expression for subsetting events
nbasis	Number of basis functions
contrasts	Contrast specifications
id	Character string identifier for the term
lag	Numeric lag in seconds
precision	Numeric precision for convolution
summate	Logical whether to summate overlapping responses
start	the start of the window for sin/poly/csplin models
stop	the stop time for sin/poly/csplin models

Value

an afni_hrfspec instance with class "afni_hrfspec"

Examples

# Create SPM canonical HRF specification
hrf1 <- afni_hrf(onsets = c(10, 30, 50), basis = "spmg1")

# Create block HRF with duration
hrf2 <- afni_hrf(onsets = c(10, 30, 50), durations = 5, basis = "block")

# Create tent basis HRF
hrf3 <- afni_hrf(onsets = c(10, 30, 50), basis = "tent", 
                 start = 0, stop = 20, nbasis = 10)

bbuchsbaum/fmrireg documentation built on June 10, 2025, 8:18 p.m.