Re: [R] problem with read.table

From: Liaw, Andy <andy_liaw_at_merck.com>
Date: Fri 26 Aug 2005 - 01:24:25 EST


Could it be that there are spaces in the names that were read in?

> a <- data.frame(" X"=1:2, " Y"=3:4, " Z"=5:6, check.names=FALSE)
> a

   X Y Z
1 1 3 5
2 2 4 6
> names(a)

[1] " X" " Y" " Z"
> a$X

NULL Andy

> From: Krishna
>
> Hi Mr. Pedro
>
> I tried names(a) and it displayed the names as X, Y and Z.
>
> rgds
>
> snvk
>
> On 8/25/05, Pedro J. Aphalo <pedro.aphalo@cc.jyu.fi> wrote:
> > Hi,
> >
> > Did you try names(a) so see what are the names of the columns in the
> > dataframe?
> >
> > Hope this helps a little.
> >
> > Pedro.
> >
> > Krishna wrote:
> > > Hi All
> > >
> > > recently i faced an unknown problem while reading the data. Can
> > > someone help me in understanding why this happened.
> > >
> > > I have .txt file containing X, Y, Z variables. I used the command
> > >
> > >
> > >>a <- read.table("filename", header=TRUE)
> > >
> > > after reading the file i am able to view it by tryping a. but i am
> > > unable to access the variables in a, by giving the command a$X.
> > >
> > >
> > >>a$X
> > >>NULL
> > >
> > >
> > > this is the output it was showing. However the same i am able to
> > > access by giving a[[1]]. i tried changing the mode by
> issuing command
> > > a <- as.data.frame(a). But situation remains the same.
> > >
> > > look forward for experts suggestion on this.
> > >
> > > rgds
> > >
> > > snvk
> > >
> > > ______________________________________________
> > > R-help@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
> >
> >
> > --
> >
> ==================================================================
> > Pedro J. Aphalo
> > Department of Biological and Environmental Science
> > University of Jyväskylä
> > P.O. Box 35, 40351 JYVÄSKYLÄ, Finland
> > Phone +358 14 260 2339
> > Mobile +358 50 3721504
> > Fax +358 14 260 2321
> > mailto:pedro.aphalo@cc.jyu.fi
> > http://www.jyu.fi/~aphalo/ ,,,^..^,,,
> > ==================================================================
> >
> >
>
> ______________________________________________
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>



R-help@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 Received on Fri Aug 26 02:59:08 2005

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