trialwise: trialwise

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

trialwise

Description

This function is to be used in formulas for fitting functions, e.g. onsets ~ trialwise() ...

Usage

trialwise(
  label = "trialwise",
  basis = "spmg1",
  onsets = NULL,
  durations = NULL,
  prefix = NULL,
  subset = NULL,
  precision = 0.3,
  id = NULL,
  add_sum = FALSE
)

Arguments

label	the label for the generated variable.
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
precision	sampling precision in seconds
id	a unique character identifier used to refer to term, otherwise will be determined from variable names.
add_sum	add the sum of all trialwise regressors to the set. This can be sued to model the average effect.

Value

a trialwisespec instance.

Examples

x <- trialwise(basis="gaussian", onsets=c(1,17,25), durations=c(1,2,3))

bbuchsbaum/fmrireg documentation built on March 1, 2025, 11:20 a.m.