[R] xtable without rownames

[Jeff D. Hamann]

I just can't get it to work... I've got a data.frame that looks like,

> ata
   age.class     acres
1          0  94.25871
2         10 202.58106
3         20 254.74497
4         30 326.43598
5         40 170.75596
6         50 146.50230
7         60  76.84737
8         70  90.65786
9         80  44.59983
10        90  56.42965
11       100  34.48122
12       200  11.21226
>

and when I attempt to set the row names using,

> rownames( ata ) <- rep( "", nrow(ata) )

I cannot print out the data.frame as I get the error message,

> rta
Error in data.frame(site.index = c("80", "90", "100", "110", "120", "130",
:
 duplicate row.names:
>

and setting the values to NULL, yields,

> rownames( ata ) <- NULL
Error in "dimnames<-.data.frame"(`*tmp*`, value = dn) :
 invalid dimnames given for data frame
> rownames( ata ) <- rep( NULL, nrow(ata) )
Error in "dimnames<-.data.frame"(`*tmp*`, value = dn) :
 invalid dimnames given for data frame
>

So just how do I do it?

----- Original Message ----- 
From: <Brian.J.GREGOR at odot.state.or.us>
To: <jeff.hamann at forestinformatics.com>; <r-help at stat.math.ethz.ch>
Sent: Thursday, May 13, 2004 9:13 AM
Subject: RE: [R] xtable without rownames


> You can just set the rownames to an empty character string ("") and xtable
> will work fine.
>
> > -----Original Message-----
> > From: Jeff D. Hamann [mailto:jeff.hamann at forestinformatics.com]
> > Sent: Wednesday, May 12, 2004 5:40 PM
> > To: r-help at stat.math.ethz.ch
> > Subject: [R] xtable without rownames
> >
> >
> > When I tried to read all the entries (after searching the
> > FAQ) for "row
> > names xtable", I get
> >
> >
> > START-INFO-DIR-ENTRY * R FAQ: (R-FAQ). The R statistical system ...
> > ... xtable* Export data to LaTeX and HTML tables. ... For
> > dropping the row
> > names of a matrix
> > `x', it may be easier to use `rownames(x) <- NULL', similarly
> > for column ...
> > cvs.r-project.org/cgi-bin/viewcvs.cgi/R/FAQ?rev=1.301 - 101k
> > - Supplemental
> > Result - Cached - Similar pages
> > I wasn't able to follow the link. I'd like to use xtable to
> > generate latex
> > tables for using with Sweave and can't figure out how to not
> > include the row
> > names. When I attempt to NULL out the row names using,
> >
> > but cannot follow the links. Browser tells me the page is
> > unavailable. When
> > I attempt to blank out the row names using,
> >
> > rownames(summary.table) <- NULL
> >
> > I get the following error
> >
> > > rownames(rta) <- NULL
> > Error in "dimnames<-.data.frame"(`*tmp*`, value = dn) :
> >  invalid dimnames given for data frame
> > >
> >
> > the resulting (incorrect) table appears as,
> >
> > > xtable( rta )
> > % latex table generated in R 1.9.0 by xtable 1.2-2 package
> > % Wed May 12 17:38:21 2004
> > \begin{table}[ht]
> > \begin{center}
> > \begin{tabular}{rlr}
> > \hline
> >  & site.index & acres \\
> > \hline
> > 1 &  80 & 20.90 \\
> > 2 &  90 & 64.42 \\
> > ...blah, blah, blah...
> > 8 & 150 & 53.32 \\
> > 9 & 170 & 0.69 \\
> > \hline
> > \end{tabular}
> > \end{center}
> > \end{table}
> > >
> >
> > with the rownames. How do I get them out?
> >
> > I'm stuck. Help.
> >
> > Jeff.
> >
> > ---
> > Jeff D. Hamann
> > Forest Informatics, Inc.
> > PO Box 1421
> > Corvallis, Oregon USA 97339-1421
> > 541-754-1428
> > jeff.hamann at forestinformatics.com
> > www.forestinformatics.com
> >
> > ______________________________________________
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>