Name
diff_date — returns the difference between 2 dates
CALLING SEQUENCE
num=diff_date(lastdate,firstdate)
PARAMETERS
- Input
lastdate = last date
firstdate = first date
- Output
num = the number of observations between the 2 dates
DESCRIPTION
Computes the number of observations between 2 dates.
EXAMPLE
d = diff_date('1995a','1985a')
// gives 10
d = diff_date('1987q4','1985q2')
// gives 10 too
d = diff_date('72m1','83m12')
// gives -143