[R] column names in data.frame
Alec Stephenson
astephen at efs.mq.edu.au
Fri Aug 20 02:59:13 CEST 2004
Your years are your row names; if you want to use them in an analysis,
it may be easiest to create a new column of years using cbind.
Alec Stephenson
Department of Statistics
Macquarie University
NSW 2109, Australia
>>> louize99 at yahoo.co.uk 08/20/04 10:43am >>>
Hi Steve and Alec,
Thanks for your help - the 2nd column does have a column name ...
see below:
> d2
av_tl
1979 3.520333
1980 3.513684
etc ...
or maybe I only have 1 column, as I can change "av_tl" to "year",
"whatever"... but then what is the list of dates (labels)?
I need to put a name to this column for subsequent analysis.
Thanks
Louize
----- Original Message -----
From: "Alec Stephenson" <astephen at efs.mq.edu.au>
To: <lhill at ipimar.pt>; <supton at referentia.com>;
<r-help at stat.math.ethz.ch>;
<louize99 at yahoo.co.uk>
Sent: Friday, August 20, 2004 1:36 AM
Subject: Re: [R] column names in data.frame
> I suspect you are interpreting the column names as a column, whereas
in
> fact you only have a single column data frame, so using
> names(d2) <- "whatever"
> will work.
>
> Thanks,
> Alec
>
>
>
> Alec Stephenson
> Department of Statistics
> Macquarie University
> NSW 2109, Australia
>
> >>> louize99 at yahoo.co.uk 08/20/04 10:10am >>>
> apparently not
> that gives me the following error:
>
> Error in "names<-.default"(`*tmp*`, value = c("year", "av_t1")) :
> names attribute [2] must be the same length as the vector
[1]
>
> presumably because the 2nd column (av_tl) already has a column name,
> and
> therefore seems longer?
>
>
> ----- Original Message -----
> From: "Steve Upton" <supton at referentia.com>
> To: "'Louize Hill'" <lhill at ipimar.pt>; <r-help at stat.math.ethz.ch>
> Sent: Friday, August 20, 2004 12:35 AM
> Subject: RE: [R] column names in data.frame
>
>
> > Is names(d2) <- c("year","av_t1") what you're looking for?
> >
> > steve
> >
> > > -----Original Message-----
> > > From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-
> > > bounces at stat.math.ethz.ch] On Behalf Of Louize Hill
> > > Sent: Thursday, August 19, 2004 7:26 PM
> > > To: r-help at stat.math.ethz.ch
> > > Subject: [R] column names in data.frame
> > >
> > > Dear R-help,
> > > Please can someone explain how to put a column name on an output
> > > data.frame.
> > >
> > > ##Starting with a data.frame with 3 columns (d$Year, d$NoIndiv,
> d$wtd_tl)
> > >
> > > yr_ind <- split (d$NoIndiv, d$Year)
> > > yr_tl <- split (d$wtd_tl, d$Year)
> > >
> > > ann_ind <- sapply (yr_ind, sum)
> > > ann_tl <- sapply (yr_tl, sum)
> > >
> > > av_tl <- ann_tl/ann_ind
> > >
> > > d2<- data.frame (av_tl)
> > >
> > > ##This gives me a data.frame with columns, the second of which
has
> a
> > > column
> > > name (av_tl)
> > > I have tried
> > > > d2<- data.frame (year = x, av_tl)
> > > > d2<- data.frame (x="year", av_tl)
> > > > d2<- data.frame (x="year", av_tl, check.names = TRUE)
> > > > d2<- data.frame (year, av_tl)
> > >
> > > as well as several combinations with cbind, as.matrix, etc...
> > > I cannot relate the examples given in ?data.frame with my
problem
> or
> find
> > > a
> > > similar problem in the archives.
> > > Thanks
> > > Louize
> > >
> > > ______________________________________________
> > > R-help at stat.math.ethz.ch mailing list
> > > https://stat.ethz.ch/mailman/listinfo/r-help
> > > PLEASE do read the posting guide!
http://www.R-project.org/posting-
>
> > > guide.html
> >
> >
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
> http://www.R-project.org/posting-guide.html
>
More information about the R-help
mailing list