Thank you Uwe, Dennis, and Gary for your help. I have one more question:

I'm using pre-defined y-scales and trying to create grid lines.

As "Female" category has low sum value, its y-axis range from 0-150 whereas
"Male" ranges from 0-300. Is it possible to make them on same scale. Here is
the previous code with an additional yScale code.

R Code (Data read in object "dta")

dta$age <- factor(dta$age, levels = c("0--4", "5--14", "15--18"), ordered =
TRUE)
dta$race <- factor(dta$race, levels = c("White", "Black", "Other"))
*yScale<-seq(0,1000,50)
*library(lattice)
barchart(dta$sum ~ dta$age | dta$gender,
 data = dta,
 groups = dta$race,
 stack = FALSE,
 aspect=0.6,
 layout=c(2,1),
 ylab = "Sum of admissions over 10 years (1996-2005)",
 xlab = "Age",
 par.settings = simpleTheme(col = c("green1", "yellow1", "orange")),
 key = list(space="right",
  cex=1,
  text=list(levels(dta$race)),
  rectangles=list(size=1.7, border="white", col = c("green1", "yellow1",
"orange"))),
  strip = strip.custom(bg="greenyellow"),
* scales=list(relation="free", y=list(rot=360, at=yScale)),
 panel=function(x,y,...)
 {
  panel.abline(h=c(yScale), col.line="gray")
            panel.barchart(x,y,...)
 }  *
)


Data:

age gender  race sum
0--4 Female Black 145
0--4 Female Other  53
0--4 Female White  47
0--4   Male Black 286
0--4   Male Other 130
0--4   Male White  94
15--18 Female Black  30
15--18 Female Other   3
15--18 Female White   9
15--18   Male Black  21
15--18   Male Other   2
15--18   Male White   3
5--14 Female Black 138
5--14 Female Other  31
5--14 Female White  23
5--14   Male Black 199
5--14   Male Other  65
5--14   Male White  29

Thanks,
Peng

On Sun, Dec 6, 2009 at 11:18 AM, Gary Miller <mail2garymil...@gmail.com>wrote:

> Thanks Uwe, I got your suggestions part too.
>
> 2009/12/6 Uwe Ligges <lig...@statistik.tu-dortmund.de>
>
> >
> >
> > Peng Cai wrote:
> >
> >> Hi,
> >>
> >> I'm plotting grouped barplot using following code and data. I need help
> >> with
> >> re-ordering the labels.
> >>
> >> 1. On x-axis the factor "AGE" is grouped in order "0--4", "15--18",
> >> "5--14";
> >> whereas I would like to have it in "0--4", "5--14", "15--18".
> >>
> >> 2. If I need to re-order "RACE" variable. How can I do it assuming I
> need
> >> to
> >> change it on both the x-axis and legend. Currenlty the order is
> >> "Black","Other","White"; whereas I would like "White", "Black", "Other".
> >>
> >> Can anyone help please. I'm using following code, which is working fine
> >> except above issues.
> >>
> >> Code:
> >>
> >> library(lattice)
> >>
> >
> > To answer your question:
> >
> >  dta$age <- factor(dta$age, levels = c("0--4", "5--14", "15--18"),
> >                   ordered = TRUE)
> >  dta$race <- factor(dta$race, levels = c("White", "Black", "Other"))
> >
> >  library(lattice)
> >
> >  barchart(sum ~ age | gender, data = dta, groups = race,
> >   stack = FALSE,
> >   ylab = "Sum of admissions over 10 years (1996-2005)",
> >   xlab = "Age",
> >   par.settings = simpleTheme(col = c("green1", "yellow1", "orange")),
> >   key = list(space="right", cex=1, text=list(levels(dta$race)),
> >
> >              rectangles=list(size=1.7, border="white",
> >                              col = c("green1", "yellow1", "orange"))),
> >   strip = strip.custom(bg="greenyellow")
> > )
> >
> >
> >
> >
> >  ################### assuming data is read in object name "dta".
> >> attach(dta)
> >>
> >
> >
> > Other comments:
> >
> > 1. You do not need attach at all here - and I recommend not to use it
> > unless you really know what you are doing and you really need it.
> > 2. you might want to choose more appropriate colours.
> >
> > Best,
> > Uwe Ligges
> >
> >
> >
> > barchart(sum ~ age | gender, data = dta,
> >>            groups = race,
> >>  stack = FALSE,
> >>  ylab="Sum of admissions over 10 years (1996-2005)",
> >>  xlab="Age",
> >>  par.settings=simpleTheme(col = c("green1", "yellow1", "orange")),
> >>  key=list(space="right", cex=1,
> >>  text=list(c("Black","Other","White")),
> >>  rectangles=list(size=1.7, border="white", col = c("green1", "yellow1",
> >> "orange"))),
> >>  strip = strip.custom(bg="greenyellow")
> >> )
> >> detach(dta)
> >>
> >> Data:
> >> age gender  race sum
> >> 0--4 Female Black 145
> >> 0--4 Female Other  53
> >> 0--4 Female White  47
> >> 0--4   Male Black 286
> >> 0--4   Male Other 130
> >> 0--4   Male White  94
> >> 15--18 Female Black  30
> >> 15--18 Female Other   3
> >> 15--18 Female White   9
> >> 15--18   Male Black  21
> >> 15--18   Male Other   2
> >> 15--18   Male White   3
> >> 5--14 Female Black 138
> >> 5--14 Female Other  31
> >> 5--14 Female White  23
> >> 5--14   Male Black 199
> >> 5--14   Male Other  65
> >> 5--14   Male White  29
> >>
> >> Thanks,
> >> Peng
> >>
> >>        [[alternative HTML version deleted]]
> >>
> >> ______________________________________________
> >> 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<http://www.r-project.org/posting-guide.html>
> <http://www.r-project.org/posting-guide.html>
> >> and provide commented, minimal, self-contained, reproducible code.
> >>
> >
> > ______________________________________________
> > 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<http://www.r-project.org/posting-guide.html>
> <http://www.r-project.org/posting-guide.html>
>  > and provide commented, minimal, self-contained, reproducible code.
> >
>
>        [[alternative HTML version deleted]]
>
> ______________________________________________
> 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<http://www.r-project.org/posting-guide.html>
> and provide commented, minimal, self-contained, reproducible code.
>

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