gen_trap_reg: Generate trapezoidal regressors.
In spant: MR Spectroscopy Analysis Tools

gen_trap_reg

R Documentation

Generate trapezoidal regressors.

Description

Generate trapezoidal regressors.

Usage

gen_trap_reg(
  onset,
  duration,
  trial_type = NULL,
  mrs_data = NULL,
  tr = NULL,
  Ndyns = NULL,
  Ntrans = NULL,
  rise_t = 0,
  fall_t = 0,
  exp_fall = FALSE,
  exp_fall_power = 1,
  smo_sigma = NULL,
  match_tr = TRUE,
  dt = 0.01,
  normalise = FALSE
)

Arguments

`onset`	stimulus onset in seconds.
`duration`	stimulus duration in seconds.
`trial_type`	string label for the stimulus.
`mrs_data`	mrs_data object for timing information.
`tr`	repetition time.
`Ndyns`	number of dynamic scans stored, potentially less than Ntrans if block averaging has been performed.
`Ntrans`	number of dynamic scans acquired.
`rise_t`	time to reach a plateau from baseline in seconds.
`fall_t`	time to fall from plateau level back to baseline in seconds.
`exp_fall`	model an exponential fall instead of linear.
`exp_fall_power`	exponential fall power.
`smo_sigma`	standard deviation of Gaussian smoothing kernel in seconds. Set to NULL to disable (default behavior).
`match_tr`	match the output to the input mrs_data.
`dt`	timing resolution for internal calculations.
`normalise`	normalise the response function to have a maximum value of one.