[R] Passing colnames to graphics title

[Austin, Matt]

If i is 1:20, there are no column names.  Make sure you are indexing the
names from your your dataframe.

> xx <- data.frame(a=c(1:10), b = letters[1:10])
> colnames(xx)
[1] "a" "b"
> for(i in 1:2) print(colnames(xx)[i])
[1] "a"
[1] "b"
> for(i in colnames(xx)) print(i)
[1] "a"
[1] "b"

Matt Austin
Statistician

Amgen 
One Amgen Center Drive
M/S 24-2-C
Thousand Oaks CA 93021
(805) 447 - 7431


> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch
> [mailto:r-help-bounces at stat.math.ethz.ch]On Behalf Of Laura Quinn
> Sent: Wednesday, February 16, 2005 6:47 AM
> To: Uwe Ligges
> Cc: r-help at stat.math.ethz.ch
> Subject: Re: [R] Passing colnames to graphics title
> 
> 
> Obviously I have been trying to use the colnames() function!
> 
> However, when I try to subscript ie:
> 
> for(i in 1:20){
> main=paste("Site:",colnames(i),sep="")
> }
> 
> this doesn't work! I thought that as.character(colnames(i)) or
> substitute(colnames(i)) might work, but to no avail...
> 
> Laura Quinn
> Institute of Atmospheric Science
> School of Earth and Environment
> University of Leeds
> Leeds
> LS2 9JT
> 
> tel: +44 113 343 1596
> fax: +44 113 343 6716
> mail: laura at env.leeds.ac.uk
> 
> On Wed, 16 Feb 2005, Uwe Ligges wrote:
> 
> > Laura Quinn wrote:
> >
> > > Hi,
> > >
> > > Just a quick query - if I'm creating a function to 
> produce a number of
> > > histograms per page of output (one per column from a 
> matrix), how can I
> > > pass the column name of the matrix into the title (or 
> indeed to form part
> > > of the x-axis label)?
> >
> >
> > By extracting them using colnames()?
> >
> > Uwe Ligges
> >
> >
> >
> > > TIA,
> > > Laura
> > >
> > > Laura Quinn
> > > Institute of Atmospheric Science
> > > School of Earth and Environment
> > > University of Leeds
> > > Leeds
> > > LS2 9JT
> > >
> > > tel: +44 113 343 1596
> > > fax: +44 113 343 6716
> > > mail: laura at env.leeds.ac.uk
> > >
> > > ______________________________________________
> > > 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