Take the 2-minute tour ×  I know that Sas starts with the
observation at the top of a dataset when processing and proceeds
to the next until it reaches the bottom observation, but is
there an easy way to make sas process the bottom observation
first and then work its way to the top?  share|improve this
question  2 Answers 2  You certainly can change your data to be
in reverse order, then process top down. Add a variable to the
data set which acts as an index..then sort the data set
descending by that variable.  data work.myData ;  set
work.myData ;  indx = _n_ ; run ;  proc sort data=work.myData ;
by descending indx ; run ; share|improve this answer +1 for a
version which works with views as well as data sets –  Simon
Nickerson May 28 '09 at 15:00  You can use nobs and point to
process it backwards without having to do any intermediate
steps. Here's an example:  data backwards;   do k= nobs to 1 by
-1;    set sashelp.class nobs = nobs point=k; proc print
data=sashelp.class;run; proc print data=backwards;run;