difficult calculation

[Filipvdr]

Hello,

My dataset looks likes this:

DATE           MONTH      VALUE

01032011      MAR2011    8.50

02032011      MAR2011    8.50

02032011      MAR2011    5.50

02032011      MAR2011    8.50

14032011      MAR2011    7.50

24032011      MAR2011    9.00

24042011      APR2011     8.50

24042011      APR2011     8.50

26042011      APR2011     2.50

24042011      APR2011     3.50

16052011      MAY2011     2.50

24052011      MAY2011     13.50

25052011      MAY2011     4.50

26052011      MAY2011     3.50

27052011      MAY2011     2.50

25062011      JUN2011     10.50

26062011      JUN2011     13.50

27062011      JUN2011     12.50

28062011      JUN2011     13.50

According to 2 macro variables i have to calculate floating averages/median/percentile.

%let calc = average;

%let bin = 3;

The number of bin is in months. So for this example if i want to calculate the number for JUN2011 the number has to be calculated on the values of APR , MAY and JUN. If the variable bin is 2 i have to calculate JUN on JUN and MAY , MAY on APR and MAY and so on..

Could anyone set me on my way? I have no idea how to start on this one.

Regards,

Filip

[manojinpec]

options mlogic mprint symbolgen;

data have;

input date date9. value 8.2;

cards;

01mar2011 8.50

16may2011 2.50

25jun2011 10.5

;

run;

%macro tot(calc=mean,bin=3,month=06);

proc means data=have(where=(date<= mdy(&month.,1,2011) and date >=intnx('mon',mdy(&month.,1,2011),-&bin.,'beg'))) ;

var value;

output out=want &CALC. = &CALC.VALUE;

run;

%mend;

%tot;