How can I cahnege the no into date ?

[vishalrajpoot3]

Hello,

Please help me to change the no 198704 to a SAS date, where 1987 is Year and 04 is month.

Actually I want to calculate the difference (L.O.R)  b/w to Date2 and Date1 in months.

Please tell me where is I am mistaking.

data abc;
set ab1;
Date1_changed = put(input(put(Date1,6.),yymmn6.),yymmn6.);
Date2_changed = put(input(put(Date2,6.),yymmn6.),yymmn6.);
LOR = intck('Months',date1, date2);
run;

Set - ab1

Date1	Date2
198704	201106
200601	201103
198709	200901
201307	201307
201310	201310
199411	200412
199308	200306
200607	201304

[RW9]

A SAS numeric date has to have all three parts - year, month, and day.  Irrespective of if you format it as month/year only it still needs the day.  This is because the value behind is actually number of days since the cuttoff.  So you would need something like:

data want;
  set ab1;
  date_1=mdy(input(substr(date,5,2),best.),1, input(substr(date,1,4),best.));
  format date_1 yymmn6.;
run;

Or more simply using an informat:

data want;
  set ab1;
  date_1=input(date,yymmn6.);
  format date_1 yymmn6.;
run;

Not tested, post test data in the form of a datastep in future!

[Kurt_Bremser]

The conversion is easier done in a strictly numeric manner:

data test;
number = 198704;
date = mdy(mod(number,100),1,int(number/100));
format date yymmddd10.;
run;

Avoids all the fiddling around with formats and informats.