Hi Rich
Without an example to check I think you need to fill in the arguments for
par.settings eg
par.settings = list(plot.symbol = list(c("black","red","dark green","dark
blue","dark goldenrod","purple"),
pch
= 20,
cex =
1),
if you have groups
par.settings = list(superpose.symbol = list(c("black","red","dark
green","dark blue","dark goldenrod","purple"),
pch = 20,
cex = 1)),
For other types such as barchart type
barchart and at the top there is
plot.symbol <- trellis.par.get("plot.symbol")
plot.line <- trellis.par.get("plot.line")
superpose.symbol <- trellis.par.get("superpose.symbol")
superpose.line <- trellis.par.get("superpose.line")
Similar occurs for panel.xyplot
I find that ? xyplot and ?panel. ... give the most uptodate methods things
change overtime.
There are some words on how information is passed to the key in ?xyplot
You either have to set trellis.par.set() or use the par.settings arguments
For older versions things may be slightly different.
If in a hurry I try the easiest but if that fails on the first go I just use
key = list(text = ... etc
Regards
Duncan
Duncan Mackay
Department of Agronomy and Soil Science
University of New England
Armidale NSW 2351
Email: home: mac...@northnet.com.au
-----Original Message-----
From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Rich Shepard
Sent: Thursday, 20 October 2016 10:05
To: r-help@r-project.org
Subject: Re: [R] Lattice xyplot(): adding a legend
On Wed, 19 Oct 2016, Rich Shepard wrote:
> I did read that but mis-applied what I read. Tried auto.key but that did
> not work as desired. Now I know to learn how to apply 'key'.
Almost there after another careful reading Section 9.2.3 ff in the book.
Here's the command to produce the plot:
rainbyday <- xyplot(rain$amount ~ raindate, data = rain, main = "Area
Precipitation",
ylab = "Daily Total Amount (in)", xlab = "Date",
scales = list(x=list(at=c(1,8,15,22,29,36,43,50,57,62), rot = 90),
y = list(at=c(min(rain$amount), max(rain$amount)))),
pch = 20,
col = c("black","red","dark green","dark blue","dark
goldenrod","purple"),
key = simpleKey(text = levels(rain$station)[1:6],
x = 0.2, y = 0.6, corner = c(0, 0), points = TRUE))
My question is how to pass pch = 20 to the key. simpleKey accepts only
the
logical TRUE as an argument and this produces a plot with filled circles for
the data but unfilled circles for the key. I find no example of specifying
pch for points in the key in either the book or ?xyplot, and I'm sure there
is a way of having the key symbols match both pch and color as the data
symbols.
Is use of Rows() the solution?
Rich
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