SaveCalFile(cal, [filespec], [dir])
Saves calibration data in the structure "cal" to a
calibration file in the
CalData folder.
If filespec is not passed, then it saves to default.mat
in the
CalData folder. If filespec is an integer, saves
to screenN.mat. If filespec is a string, saves to string.mat.
Psychtoolbox/PsychCal/SaveCalFile.m