[R] FW: R Statistics

[William Dunlap]

You can do this in 2 steps - have cut() make a factor with a different
level for each time period
then use levels<-() to merge some of the levels.
   > z <- cut(.5:3.5, breaks=c(0,1,2,3,4), labels=c("0-1", "1-2", "2-3",
"3-4"))
   > levels(z)
   [1] "0-1" "1-2" "2-3" "3-4"
   > levels(z) <- c("between", "1-2", "between", "3-4") # or
levels(z)[c(1,3)] <- "between"
   > str(z)
   Factor w/ 3 levels "between","1-2",..: 1 2 1 3




Bill Dunlap
TIBCO Software
wdunlap tibco.com

On Tue, Dec 2, 2014 at 11:32 AM, Dries David <dries-david at hotmail.com>
wrote:

>
> > > Hey
> > > I have a question about making a new variable in R. I have put my
> dataset in attachment. I have to make a new variable "spits" where
> spits=morning when uurenminuut (also a variabel) is between 5.30 and 9.30,
> when uurenminuut is between 16.30 and 19.0 spits has to be equal to
> evening. But here is my problem: for all the values not between 5.30- 9.30
> and 16.30-19.0 spits must be equal to "between"
> > >
> > > achtergrond$minuutdec=achtergrond$minuut/100
> > > achtergrond$uurenminuut=achtergrond$uur+achtergrond$minuutdec
> > >
> achtergrond$spits=cut(uurenminuut,c(-1.0,5.30,9.30,16.30,19.0,24.0),labels=c("between","morning","between","evening","between"),right=FALSE)
> > >
> > > When I do this i get a warning message, because I use between more
> than once as label. Between has to be one label that covers all values that
> are not in morning and evening.
> > >
> > > Could you help me with this?
> > >
> > > Kind regards
> > >
> > > Dries David
> > >
> >
>
>
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