[R] Replacing NA values in one column of a data.frame

John Kane jrkrideau at yahoo.ca
Tue Aug 18 16:26:23 CEST 2009


OOPs clumsy cut and paste.  :(

--- On Tue, 8/18/09, Uwe Ligges <ligges at statistik.tu-dortmund.de> wrote:

> From: Uwe Ligges <ligges at statistik.tu-dortmund.de>
> Subject: Re: [R] Replacing NA values in one column of a data.frame
> To: "John Kane" <jrkrideau at yahoo.ca>
> Cc: r-help at r-project.org, "Steve Murray" <smurray444 at hotmail.com>
> Received: Tuesday, August 18, 2009, 10:25 AM
> 
> 
> John Kane wrote:
> > Perhaps
> > testdata$onecolumn[testdata$onecolumn==NA] <- 9999
> > 
> 
> Well, with is.na() there is a much better chance to make it
> work
> 
> Uwe Ligges
> 
> 
> 
> 
> > --- On Mon, 8/17/09, Steve Murray <smurray444 at hotmail.com>
> wrote:
> > 
> >> From: Steve Murray <smurray444 at hotmail.com>
> >> Subject: [R] Replacing NA values in one column of
> a data.frame
> >> To: r-help at r-project.org
> >> Received: Monday, August 17, 2009, 11:41 AM
> >>
> >> Dear all,
> >>
> >> I'm trying to replace NA values with -9999 in one
> column of
> >> a data frame. I've tried using is.na and the
> >> testdata[testdata$onecolumn==NA] <- 9999
> approach, but
> >> whilst neither generate errors, neither result in
> -9999s
> >> appearing - the NAs remain there!
> >>
> >> I'd be grateful for any advice on what I'm doing
> wrong or
> >> any other suitable approaches.
> >>
> >> Many thanks,
> >>
> >> Steve
> >>
> >>
> _________________________________________________________________
> >>
> >> oticons.
> >>
> >> ______________________________________________
> >> 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.
> >>
> > 
> > 
> >   
>    __________________________________________________________________
> > [[elided Yahoo spam]]
> > 
> > ______________________________________________
> > 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.
> 


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