date variable

Amalik — Mon, 23 Apr 2018 01:57:28 GMT

Hi,

I have following data;

permno	date
1	1/31/2008
2	1/31/2008
3	1/31/2008
1	2/29/2008
2	2/29/2008
3	2/29/2008

I am using following code,

data tmp1.firstandlastdates;
set tmp1.finaluse(keep=permno date);
by permno; /*finaluse is always sorted by permno date*/
retain firstdate;
date=intnx('month', date, 1)-1;
if first.permno then firstdate=date;
if last.permno then do;
lastdate=date;
output;
end;
run;

The results I am getting is in this form;

permno	date	firstdate	lastdate
1	1/31/2008	17562	17562
2	1/31/2008	17562	17562
3	1/31/2008	17562	17562
1	2/29/2008	17562	17562
2	2/29/2008	17562	17562
3	2/29/2008	17562	17562

As you can see, the first and lastdates are not in date format but rather in some other form. What can be causing this?

Re: date variable

Reeza — Mon, 23 Apr 2018 02:09:28 GMT

They are dates you haven't applied a format yet.

SAS stores dates as the number of days from January 1, 1960.

Add a FORMAT statement to apply formats to your dates and they'll show up as desired.

format firstdate yymmddd10. lastdate date9.;

@Amalik wrote:

Hi,

I have following data;

permno date

1 1/31/2008

2 1/31/2008

3 1/31/2008

1 2/29/2008

2 2/29/2008

3
2/29/2008

I am using following code,

data tmp1.firstandlastdates;
set tmp1.finaluse(keep=permno date);
by permno; /*finaluse is always sorted by permno date*/
retain firstdate;
date=intnx('month', date, 1)-1;
if first.permno then firstdate=date;
if last.permno then do;
lastdate=date;
output;
end;
run;

The results I am getting is in this form;

permno date firstdate lastdate

1 1/31/2008 17562 17562

2 1/31/2008 17562 17562

3 1/31/2008 17562 17562

1 2/29/2008 17562 17562

2 2/29/2008 17562 17562

3 2/29/2008 17562 17562

As you can see, the first and lastdates are not in date format but rather in some other form. What can be causing this?

topic date variable in SAS Programming

date variable

Re: date variable