Hi,
how can I change the plotting symbol for the groups in a trellis panel dotplot.
My graph is similar to:
library(trellis)
dotplot(variety ~ yield | site, data = barley, groups = year,
key = simpleKey(levels(barley$year), space = "right"),
xlab = "Barley Yield (bushels/acre) ",
aspect=0.5, layout = c(1,6), ylab=NULL)
I'd like to plot the different years with different symbols (eg. one
with pch=19 the other with pch=21 or so). Thank you very much for your
help.
Tom
Gabor Grothendieck
2007-Jan-30 21:55 UTC
[R] change plotting symbol for groups in trellis graph
Try this:
library(lattice)
dotplot(variety ~ yield | site, data = barley, groups = year,
auto.key = list(space = "right"),
xlab = "Barley Yield (bushels/acre) ",
aspect=0.5, layout = c(1,6), ylab=NULL,
par.settings = list(superpose.symbol = list(pch = c(19, 21))))
On 1/30/07, Tom Boonen <tom.boonen.maiden at gmail.com>
wrote:> Hi,
>
> how can I change the plotting symbol for the groups in a trellis panel
dotplot.
>
> My graph is similar to:
>
> library(trellis)
> dotplot(variety ~ yield | site, data = barley, groups = year,
> key = simpleKey(levels(barley$year), space =
"right"),
> xlab = "Barley Yield (bushels/acre) ",
> aspect=0.5, layout = c(1,6), ylab=NULL)
>
> I'd like to plot the different years with different symbols (eg. one
> with pch=19 the other with pch=21 or so). Thank you very much for your
> help.
>
> Tom
>
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