On 9/2/08, Steven McKinney <[EMAIL PROTECTED]> wrote:
>
>
> This is close, but maybe not optimal lattice coding.
> I haven't yet figured out how to suppress the x axis
> labeling.
>
> bwplot(yield ~ 1|year, panel = function(x, y, ...){panel.bwplot(x, y, ...,
> pch = "|"); panel.points(x, mean(y), ..., pch=17)}, data = barley,
> horizontal = FALSE, xlab = "")
>
A direct translation would be
bwplot(yield ~ year, data = barley, horizontal = FALSE,
panel = function(x, y, ...) {
panel.bwplot(x, y, ..., pch = "|");
mean.values <- tapply(y, x, mean)
panel.points(1:2, mean.values, ..., pch = 17)
})
and that seems to work.
-Deepayan
> Steve McKinney
>
>
>
> -----Original Message-----
> From: [EMAIL PROTECTED] on behalf of Surai
> Sent: Tue 9/2/2008 5:53 PM
> To: [email protected]
> Subject: [R] lattice command equivalent to points
>
> Hello,
> This is my first post to R-help so forgive me if I'm committing a fatal
> error somehow. Feel free to let me know.
>
> My question is this: I would like to add a triangle to represent the mean
> in a box plot generated with the bwplot command. How do I do this? I am
> able to do this using the boxplot and points command but points does not work
> with bwplot. If you run the following code in R, you'll see that I'm
> trying to reproduce graphs from method 2 by modifying code from method 1.
>
> Thank you,
> Surai Jones
>
>
> library(lattice)
> attach(barley)
>
> #method 1
> bwplot(yield~year, pch="|")
>
> #method 2
> boxplot(yield~year)
> mean.values<-tapply(yield,year, mean)
> points(1:2, mean.values, pch = 17)
>
>
>
> [[alternative HTML version deleted]]
>
>
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>
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