changing settings on a barchart (lattice)

Thanks a lot, Sundar. I experimented somewhat and here is the code
that works well - it allows me to modify most of the stuff I want to
modify:

p<-as.vector(c(0.1, 0.2, 0.3, 0.4))
names(p)<-c("AAAAA","BBBBBB","CCCCCCCCCCCC","DDDDDDDD")
barchart(~sort(p), main=list("Chart Title",cex=1),xlab=list("X axis
title",cex=1),xlim=c(0,0.42),
               layout = c(1,1),
               stack = TRUE,
               auto.key = list(points = FALSE, rectangles = TRUE, space = "top"),
               panel = function(y,x,...){
                       panel.grid(h = 0, v = -1, col = "gray60", lty ="dotted")
                       panel.barchart(x,y,col="brown")
                       panel.text(x,y,label = round(x,2),cex=1)
       }
)

One last question: How can I modify the way the value labels (those
that are at the end of the bars) appear? Can I make them bold? Make
them appear a bit to the right or to the left of where they currently
are?
Thanks a lot!

Dimitri

On Wed, Feb 11, 2009 at 12:46 PM, Sundar Dorai-Raj <sdorairaj at gmail.com> wrote:

Pass a list to xlab and main for the font sizes:

barchart(..., xlab = list("x-axis", cex = 2), main = list("title", cex = 2))

For value labels and a grid you'll need a custom panel function:

barchart(..., panel = function(x, y, ...) {
 panel.barchart(x, y, ...)
 panel.text(x, y, format(y), cex = 1.2)
 panel.grid(h = -1, v = -1)
})

This is untested, but I think it should get you started.

--sundar

On Wed, Feb 11, 2009 at 9:10 AM, Dimitri Liakhovitski <ld7631 at gmail.com> wrote:

Hello!

I apologize - I never used lattice before, so my question is probably
very basic - but I just can't find the answer in the archive nor in
the documentation:

I have a named numeric vector p of 6 numbers (of the type 6 numbers
with people's names to whom those numbers belong). I want a simple bar
chart.

I am doing:

library(lattice)
trellis.par.set(fontsize=list(text=12))      # Changes only axes font
barchart(~sort(p),main="Text for main",xlab="Text for X axis",
col=PrimaryColors[3])

It works just fine.
Question: Where how can I change such things as font size for X axis
label (below the numbers), font size for Title, value labels (to label
bars with actual numbers), add grids, etc.?

Thanks a lot!

--
Dimitri Liakhovitski
MarketTools, Inc.
Dimitri.Liakhovitski at markettools.com

--
Dimitri Liakhovitski
MarketTools, Inc.
Dimitri.Liakhovitski at markettools.com