topic DATDIF function in SAS Programming

DATDIF function

Danglytics — Tue, 26 Jul 2011 17:04:18 GMT

Hi,

I'm trying to get the difference in Years between two dates at the end of each month end date.

MembershipDate: which is a Datetime format and

I have a parameter I reference throughout my code to be the month end date:

%let cur_mth_end = '31Jan10'd.

I used the function

Tenure = Datdif (MembershipDate, &cur_mth_end, 'act/act') / 365 ;

but I get the note:

Invalid argument to function DatDif

I'm pretty sure its because MembershipDate is a datetime format, but not sure how to fix this.

Thanks for your help.

DATDIF function

Reeza — Tue, 26 Jul 2011 17:10:31 GMT

To convert a datetime to date use the datepart function.

You might want to look up the intck function which calculates some date difference and you can also customize the alignment in that function to 'end' of the month/year which seems what you're looking for.

DATDIF function

art297 — Tue, 26 Jul 2011 17:14:30 GMT

How about if you wrap MembershipDate within a datepart function? e.g.

Tenure = Datdif (datepart(MembershipDate), &cur_mth_end, 'act/act') / 365 ;

DATDIF function

Danglytics — Tue, 26 Jul 2011 17:26:05 GMT

I've tried

Tenure = Datdif (datepart(MembershipDate), &cur_mth_end, 'act/act') / 365

but i'm still getting the error.

DATDIF function

Reeza — Tue, 26 Jul 2011 17:32:15 GMT

Post your log, where you're using the mprint option.

DATDIF function

Danglytics — Tue, 26 Jul 2011 17:44:01 GMT

Thanks for your help, I used INTCK to solve it.