[R] Sorting a dataframe

Marc Schwartz MSchwartz at medanalytics.com
Tue Aug 12 18:54:13 CEST 2003

On Tue, 2003-08-12 at 11:38, Paul, David A wrote:
> Undoubtedly a simple question:
> I've looked at order() and sort() in the help pages for
> R1.7.1.  It doesn't appear that these functions are immediately
> suited to doing the same thing as
> 	BY X Y Z;
> RUN;
> in SAS.  I have also checked Frank Harrell's Hmisc library.
> Could someone point me in the right direction so I can sort 
> by the levels of Z within the levels of Y within the levels 
> of X?  Everything needs to be in ascending order.
> Much thanks in advance,
>   david paul

A quick search of the R-help archive would reveal this recent post:




Marc Schwartz

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