Is there anything in your dataset which denotes groups?
For the dataset as posted, I'd do
data second;
set have (keep=x rename=(x=xx));
n = _n_;
run;
proc sort data=second;
by n descending;
run;
data want;
merge
have
second (drop=n)
;
run;
Untested, posted from my tablet.
Is there anything in your dataset which denotes groups?
For the dataset as posted, I'd do
data second;
set have (keep=x rename=(x=xx));
n = _n_;
run;
proc sort data=second;
by n descending;
run;
data want;
merge
have
second (drop=n)
;
run;
Untested, posted from my tablet.
Alternatively, you can use a second SET statement with a POINT= option:
data want;
set have nobs=n;
_n_=n-_n_+1;
set have(keep=x rename=(x=xx)) point=_n_;
run;
@FreelanceReinh, I didn't notice your solution and wrote almost exactly the same 😄 😄
Bart
You can use the POINt= for this (no sorting).
data have;
input X Y Z;
cards;
10 11 21
2 12 22
40 13 23
4 14 24
80 15 25
;
run;
proc print data=have;
run;
data want;
set have nobs=nobs curobs=curobs;
point=nobs-curobs+1;
set have(keep=x rename=(x=xx)) point=point;
run;
proc print data=want;
run;
Bart
Just for some fun. Here is a SAS/IML solution.
data have;
input X Y Z;
cards;
10 11 21
2 12 22
40 13 23
4 14 24
80 15 25
;
run;
proc iml;
use have nobs nobs;
read all var {x y z};
close;
xx=x[nobs:1];
create want var {x y z xx};
append;
close;
quit;
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