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pain
1997 Apr 08
1
R-alpha: User friendly functions
...ave
parts of this, e.g. in Kurts ctest routines. Specifically, I was
thinking about data frames: How about
dfr.sel<-select.frame(dfr,age,sex,pain1:pain5)
with the : specifying a range, instead of
dfr.sel<-dfr[,c(1,2,5,6,7,8,9)]
or
attach(dfr)
dfr.sel<-data.frame(age,sex,pain1,pain2,pain3,pain4,pain5)
detach(dfr)
(which isn't even safe if there are variables of the same name in the
global environment)
similarly, how about
dfr.sub<-subset.frame(dfr,sex==1 && age > 30)
rather than
dfr.sub<-dfr[dfr$sex==1 && dfr$age > 30,]
Both would seem to be qu...