This function epochs data using a start and an end message (i.e., explicit timestamps).
epoch_start_end_msg(eyeris, start, end, hz, verbose)
A list containing epoch results
An object of class eyeris
derived from load_asc()
A dataframe containing the start timestamps
A dataframe containing the end timestamps
Sampling rate in Hz
A flag to indicate whether to print detailed logging messages
This function is called by the internal epoch_start_end_msg()
function.