afni_hrf: construct an native AFNI hrf specification for '3dDeconvolve'...
In bbuchsbaum/fmrireg: R package for the anlysis of fmri data

afni_hrf

R Documentation

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", "gam", "spmg2",
    "spmg3", "wav"),
  onsets = NULL,
  durations = NULL,
  prefix = NULL,
  subset = NULL,
  nbasis = 1,
  contrasts = NULL,
  id = NULL,
  lag = 0,
  start = NULL,
  stop = NULL
)

Arguments

`...`	the variable names, all of which must be present in the enclosing environment (e.g. an `event_model` object)
`basis`	the impulse response function or the name of a pre-supplied function, one of: "gamma", "spmg1", "spmg2", "spmg3", "bspline", "gaussian".
`onsets`	optional onsets override. If missing, onsets will be taken from the `event_model`
`durations`	optional durations override. If missing, onsets will be taken from the `event_model`
`prefix`	a character string that is prepended to the variable names and used to identify the term. Can be used to disambiguate two `hrf` terms with the same variable(s) but different onsets or basis functions.
`subset`	an expression indicating the subset of 'onsets' to keep
`nbasis`	number of basis functions – only used for hemodynamic response functions (e.g. bspline) that take a variable number of bases.
`contrasts`	one or more `contrast_spec` objects created with the `contrast` function. If multiple contrasts are required, then these should be wrapped in a `list` or `contrast_set`.
`id`	a unique `character` identifier used to refer to term, otherwise will be determined from variable names.
`lag`	a temporal offset in seconds which is added to onset before convolution
`start`	the start of the window for sin/poly/csplin models
`stop`	the stop time for sin/poly/csplin models