[R] changing settings on a barchart (lattice)

[Dimitri Liakhovitski]

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
>>
>> ______________________________________________
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>> 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.
>>
>



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