topic Re: Difference between two times (24hr clock) in SAS Programming

Difference between two times (24hr clock)

kaushik_patra — Fri, 16 Dec 2016 17:42:02 GMT

I am using the following syntax to calculate the minutes between two time variable.

INFTIME = INTCK('MINUTE',INPUT(EXSTTM,TIME8.),INPUT(EXENTM,TIME8.));

EXSTTM = 23:48

EXENTM = 00:48

The result is coming out as -1380 but I expect the result to be 60 min obviously. Guess the problem is the end time 00:48 which is the next day. Any suggestion?

Re: Difference between two times (24hr clock)

Jagadishkatam — Fri, 16 Dec 2016 18:17:07 GMT

data have ;
EXSTTM = '23:48't;
EXENTM = '00:48't;
if EXENTM lt EXSTTM then duration=('24:00't-EXSTTM)+EXENTM; 
else duration=intck('minute',EXSTTM,EXENTM);
format EXSTTM EXENTM duration time5.;
run;

Re: Difference between two times (24hr clock)

kaushik_patra — Fri, 16 Dec 2016 18:50:06 GMT

Thanks Jag. It worked; I had to do a minor tweak to divide it by 60 as the duration is calculated in seconds and I wanted it to be in minutes.

Kaushik

Re: Difference between two times (24hr clock)

ballardw — Fri, 16 Dec 2016 19:00:24 GMT

If you are going to compare times across midnight you will need to incorporate a DATE portion, make a datetime value and then you can use intnx function to return minutes between directly using the 'minute' interval.

Re: Difference between two times (24hr clock)

kaunth — Thu, 03 May 2018 12:41:13 GMT

what if EXSTTM=03:38

and EXENTM=03:18 which is on the same day then this code will create problems.