Hi Felix,

Thanks for your help. If I'm defining my own y-scales like the one in R code
below, then can I remove right side tick marks?

dta<-read.table("data.txt", header=TRUE, row.names="Names")
library(lattice)
yScale <- seq(-200, 200, 10)
barchart(data.matrix(dta),
      horizontal=FALSE,
      stack=TRUE,
      par.settings = simpleTheme(col = 3:5),
      auto.key=list(space="right"),
      border=NA,
    scales = list(y = list(at = yScale))
)

Thanks,
Peng

On Wed, Dec 2, 2009 at 5:44 PM, Felix Andrews <felix@nfrac.org> wrote:

> 2009/12/3 Peng Cai <pengcaimaillist@gmail.com>:
> > Hi R Users,
> >
> > I'm using following data/code (data is attached also) to produce a
> stacked
> > barplot.
> >
> > # Sample Data:
> > Names Col1 Col2 Col3
> > Row1 -20 40 -10
> > Row2 30 -20 40
> > Row3 30 10 -20
> > Row4 20 20 -10
> >
> >
> > # R Code:
> > dta<-read.table("data.txt", header=TRUE, row.names="Names")
> > barchart(data.matrix(dta),
> >     horizontal=FALSE,
> >     stack=TRUE,
> >     par.settings = simpleTheme(col = 3:5),
> >     auto.key=list(space="right"),
> >     border=NA
> > )
> >
> > I need help with:
> >
> > 1. How can I remove the (y-axis) tick marks on the right side of the
> plot.
>
> Since you only have one panel, try scales = "free"
>
>
> > 2. While reading in the data, I'm using "row.names=Names". Can I
> generalize
> > this? What I mean is if for some other data set, the row names column
> > has some other name (say Names2) or may be just blank. Can I still
> produce a
> > similar graph plotting row labels (in this case they are Row1, Row2, ...)
> on
> > x-axis.
>
> row.names can be a column number (1)
> See ?read.table
> It also describes the behaviour when the row names column is blank.
>
> >
> > Any help would be appreciated,
> >
> > Thanks,
> > Peng
> >
> > ______________________________________________
> > R-help@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.
> >
> >
>
>
>
> --
> Felix Andrews / 安福立
> Postdoctoral Fellow
> Integrated Catchment Assessment and Management (iCAM) Centre
> Fenner School of Environment and Society [Bldg 48a]
> The Australian National University
> Canberra ACT 0200 Australia
> M: +61 410 400 963
> T: + 61 2 6125 4670
> E: felix.andrews@anu.edu.au
> CRICOS Provider No. 00120C
> --
> http://www.neurofractal.org/felix/
>

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