Please help me with asigning an index number to each date

Anna_Guo — Wed, 09 Jan 2013 17:38:04 GMT

I want to asign an index number for each date. But some dates are missing in the index table, in this case I will asign index number of the nearest next date. I attached a file which has two tables.

I know proc sql can add index number, but my problem is that some dates are not in one table.

Thanks a lot.

Re: Please help me with asigning an index number to each date

art297 — Wed, 09 Jan 2013 18:45:42 GMT

One way is to create and apply a format. e.g.:

data Table1;

informat IndexDate anydtdte.;

format IndexDate date9.;

input IndexDate datenumber;

cards;

01-01-1997 1

01-02-1997 2

01-03-1997 3

01-06-1997 4

01-07-1997 5

01-08-1997 6

01-09-1997 7

01-10-1997 8

1/13/1997 9

1/14/1997 10

1/15/1997 11

1/16/1997 12

1/17/1997 13

1/20/1997 14

1/21/1997 15

1/22/1997 16

1/23/1997 17

1/24/1997 18

1/27/1997 19

1/28/1997 20

1/29/1997 21

1/30/1997 22

1/31/1997 23

02-03-1997 24

;

data table1_expanded (drop=_:);

set table1 (rename=(IndexDate=start datenumber=label));

retain fmtname "dates" type "N" ;

_date=lag(start);

if not missing(_Date) and start gt _date+1 then do;

_hold_IndexDate=start;

do start=_date+1 to _hold_IndexDate;

output;

end;

else output;

run;

proc format cntlin = table1_expanded ;

run ;

data Table2;

informat D1-D3 anydtdte.;

format D1-D3 date9.;

input D1-D3;

cards;

01-04-1997 1/21/1997 1/23/1997

01-05-1997 1/17/1997 1/24/1997

1/17/1997 1/20/1997 1/27/1997

1/20/1997 1/21/1997 01-09-1997

1/21/1997 1/25/1997 1/17/1997

1/22/1997 02-01-1997 1/20/1997

1/23/1997 1/21/1997 1/21/1997

1/24/1997 1/22/1997 1/22/1997

;

data want;

set table2;

d1_num=put(d1,dates.);

d2_num=put(d2,dates.);

d3_num=put(d3,dates.);

run;

Re: Please help me with asigning an index number to each date

Anna_Guo — Wed, 09 Jan 2013 20:19:08 GMT

Arthur,

Thank you very much.

topic Please help me with asigning an index number to each date in SAS Procedures

Please help me with asigning an index number to each date

Re: Please help me with asigning an index number to each date

Re: Please help me with asigning an index number to each date