R help - Dec 2009 - Help: barchart() {Lattice}

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.
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.

Any help would be appreciated,

Thanks,
Peng
-------------- next part --------------
Names	Col1	Col2	Col3
Row1	-20	40	-10
Row2	30	-20	40
Row3	30	10	-20
Row4	20	20	-10

2009/12/3 Peng Cai <pengcaimaillist at 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 at 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.
>
>


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Hi All,

I'm trying par(mfrow(c(1,2))) with barchart(), but its not working. Can I
display two or more barcharts on a same page using some other function? I'm
using following code --- where barchart() part is taken from help manual.

library(lattice)
par(mfrow=c(1,2))
barchart(yield ~ variety | site, data = barley,
         groups = year, layout = c(1,6),
         ylab = "Barley Yield (bushels/acre)",
         scales = list(x = list(abbreviate = TRUE,
                       minlength = 5)))
barchart(yield ~ variety | site, data = barley,
         groups = year, layout = c(1,6), stack = TRUE,
         auto.key = list(points = FALSE, rectangles = TRUE, space
"right"),
         ylab = "Barley Yield (bushels/acre)",
         scales = list(x = list(rot = 45)))
par(mfrow=c(1,1))

Thanks,
Xin

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