Internal function to detrend pupil data

This function detrends pupil data by fitting a linear model of pupil_data ~ time, and returning the fitted betas and the residuals (pupil_data - fitted_values).

This function is called by the exposed wrapper detrend().

Usage

detrend_pupil(x, prev_op)

Arguments

x

A data frame containing pupil data with columns time_secs and the previous operation's pupil column

prev_op

The name of the previous operation's pupil column

Value

A list containing the fitted values, coefficients, and residuals