[R] FW: FW: Renaming levels of a factor in a dataframe

[B Jessop]

Tyler,

 

My apology.  It does help to type correctly and eliminate unnecessary spaces in commands. The following does work correctly:

 

levels(Data1$Site) <- list(Fw = c("AB"), Est = c("DE")) 

 

Thanks very much,

BJ  

----------------------------------------
> From: deelman at hotmail.com
> To: r-help at r-project.org
> Date: Mon, 15 Aug 2011 11:36:07 -0300
> Subject: [R] FW: Renaming levels of a factor in a dataframe
>
>
> Tyler,
>
>
>
> Tried your solution: levels (Data1$Site <- list(Fw = c("AB"), Est = c("DE")))
>
>
>
> but still got a NULL response to str(Data1) and an alternating list of Fw, Est, Fw, Est under Site when looked at in the Data editor in R console. The use of the "levels" function would seem to be appropriate but tricky to use. Any other ideas would be welcome.
>
>
>
> Regards,
>
> BJ
>
> ________________________________
> > From: tyler_rinker at hotmail.com
> > To: deelman at hotmail.com; r-help at r-project.org
> > Subject: RE: [R] Renaming levels of a factor in a dataframe
> > Date: Sun, 14 Aug 2011 13:18:12 -0400
> >
> > Here's an example of relevel used to relevel and combine groups....
> >
> > InsectSprays2<-InsectSprays
> > levels(InsectSprays2$spray)
> > levels(InsectSprays2$spray)<-list(new1=c("A","C"),YEPS=c("B","D","E"),LASTLY="F")
> > levels(InsectSprays2$spray)
> > InsectSprays2
> >
> > So for you try...
> > levels (Data1$Site) <- list(Fw =c( "AB"), Est = c("DE"))
> >
> > > From: deelman at hotmail.com
> > > To: r-help at r-project.org
> > > Date: Sun, 14 Aug 2011 12:56:25 -0300
> > > Subject: [R] Renaming levels of a factor in a dataframe
> > >
> > >
> > >
> > > Dear Helplist:
> > >
> > >
> > >
> > > I am trying, unsuccessfully, to rename levels of a factor in a
> > dataframe. The dataframe consists of two factor variables and one
> > numeric variable as follows:
> > >
> > > Factor Site has 2 levels AB and DE, factor Fish has 30 levels, 15
> > associated with each Site e.g. 1-1, 1-2,.....2-1, 2-2.... I am trying
> > to rename the levels of factor Site from AB to Fw and DE to Est while
> > keeping them as factors. The following 2 approaches do not work, each
> > giving a NULL response and creating a character string.
> > >
> > >
> > >
> > > levels (Data1$Site <- c("Fw", "Est")) This simply gives an
> > alternating list of Fw, Est, Fw, Est... not the desired 15 concurrent
> > rows of Fw followed by 15 of Est.
> > >
> > >
> > >
> > > #levels (Data1$Site <- list(Fw = "AB", Est = "DE")) This gives the
> > same result. I have tried other approaches to no avail. It seems a
> > simple problem but has not been so.
> > >
> > >
> > >
> > > Any suggestions for solving this problem would be much appreciated.
> > >
> > >
> > >
> > > Regards,
> > >
> > > BJ
> > > ______________________________________________
> > > R-help at r-project.org mailing list
> > > 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.
> ______________________________________________
> R-help at r-project.org mailing list
> 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.