It looks like your data has class "factor". If you call factor() on a
factor variable, without supplying an explicit 'levels' argument it
produces a new factor variable without any levels not present in the input
factor. E.g.,
> fOrig <- factor(c(NA,"A","B","D",NA,"D"), levels=c("D","C","B","A"))
> summary(fOrig)
D C B A NA's
2 0 1 1 2
> fNew <- factor(fOrig)
> summary(fNew)
D B A NA's
2 1 1 2
You can use levels(fNew) <- c("delta","beta","alpha") to give the levels
new names.
I think that renaming "0", "2", "3" to "0","1","2" will lead to
confusion. The levels
are just names, so give them names that mean something to a human, like
"control",
"streptomycin (2 mg/kg)", etc.
Bill Dunlap
TIBCO Software
wdunlap tibco.com
On Wed, May 23, 2018 at 3:14 AM, Lisa van der Burgh <lisavdbu...@hotmail.com
> wrote:
> Hi all,
>
>
> I have a very general question and I think for you maybe very easy, but I
> am not able to solve it.
>
> I have a dataset and that dataset contains the variable Anxiolytics. This
> variable is coded as 0, 1, 2. The variable looks as follows:
>
>
> > summary(DF$Anxiolytics)
> 0 1 2 NA's
> 1102 0 20 440
>
>
> You can see that the variable is coded as 0, 1, 2, but group 1 is 'empty'.
> So I want to remove this group, such that I get:
>
> > summary(DF$Anxiolytics)
> 0 2 NA's
> 1102 20 440
>
> And then I want to recode the variable in a way that 2 becomes 1, such as:
>
> > summary(DF$Anxiolytics)
> 0 1 NA's
> 1102 20 440
>
> Can you help me with the code for doing this?
>
> Thank you in advance!
> Best, Lisa
>
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/
> posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
