create_ppi_var: create_ppi_var

In epongpipat/ppi: Psychophysiological Interaction (PPI)

create_ppi_var

Description

creates data for each step of the ppi variable by wrapping the functions: convolve_afni() and downsample()

Usage

create_ppi_var(
  psy_var,
  phys_var,
  hrf,
  tr,
  n_volumes,
  upsample_factor = NULL,
  deconvolve = TRUE,
  afni_path = NULL,
  afni_quiet = FALSE
)

Arguments

psy_var	psychological variable data (e.g., psy var that is contrast-coded and upsampled)
phys_var	physiological variable data (e.g., psy var that is detrended and upsampled)
hrf	hemodynamic response function (hrf) time series data
tr	repetition time (tr) in seconds
n_volumes	number of volumes or time points
upsample_factor	factor to upsample data by for convolution and deconvolution step (default: NULL)
deconvolve	option to perform or not perform deconvolution step (default: TRUE)
afni_path	path to afni directory (default: NULL)

Value

a list of datasets for each data wrangling step of the ppi variables

epongpipat/ppi documentation built on Jan. 31, 2024, 1:02 p.m.