get a tlist, mlist or struct fields names
f = fieldnames(lst)
:lst A tlist, mlist or struct variable. : :f Strings column vector of fields names. :
The fieldnames function returns field names of a tlist, mlist or struct. fieldnames does not work on cells.
fieldnames(`tlist`_(['listtype', 'f1', 'f2'], [], []))
fieldnames(`mlist`_(['V', 'key', 'value'], ['a' 'b' ; 'c' 'd'], [1 2 ; 3 4]))
fieldnames(`struct`_('f1', 25, 'month', 'DEC', 'year', 2006))
obj.x = 3;
obj.y = 3;
fieldnames(obj)