Load the predefined and the user-defined fitting functions.
[DEFAULTFIT, USERFIT] = loadfit loads the predefined and the user-
defined fitting functions.
DEFAULTFIT = loadfit('default') loads only the predefined fits.
USERFIT = loadfit('user') loads only the user-defined fits.
DEFAULTFIT and USERFIT are structure arrays containing two fields,
'name' and 'eq'.
If the file(s) for the predefined and/or the user-defined fits do(es)
not exist, loadfit creates it (them).
Published output in the Help browser