load_tac: Loads TAC from file for use by other functions (default is PMOD .tac format)
Description
This is the main function for loading an individual participant's TAC data.
The minimal required information within the supplied files is the start and
stop times and a time unit (either seconds or minutes), as well as the
activity values for 1 or more ROIs, and units for activity. The currently
supported formats (with the corresponding format argument), include:
"PMOD": PMOD .tac files
"voistat": PMOD TAC .voistat files used in combination with PMOD
.acqtimes file for start/stop times.