[R] Specifying point symbol fill colour in lattice xyplot keys

[Duncan Mackay]

Hi Wayne

Try this

library(lattice)

xyplot(1:10 ~ 1:10,
       par.settings = list(plot.symbol = list(col = "blue",
                                              fill = "red",
                                              cex = 1,
                                              pch = 21)),
       type = "p",
       key = list(points = list(col = "blue",
                                fill = "red",
                                cex = 3,
                                pch = 21))

)

I sometimes have trouble with passing colours etc to panels and keys 
in lattice but this seems to work.
If you have groups change plot.symbol to superpose.symbol

Duncan


Duncan Mackay
Department of Agronomy and Soil Science
University of New England
Armidale NSW 2351
Email: home: mackay at northnet.com.au



At 11:11 12/03/2013, you wrote:
>Dear all,
>
>When defining explicit keys with xyplot, I have previously used the 
>fill parameter to set the background colour of point symbols. That's 
>no longer working for me, and I am wondering whether it's a bug or 
>whether I've misinterpreted the documentation and have been relying 
>on a feature wasn't intended. If the latter, can anyone suggest the 
>correct way to do it?
>
>Here's an example of what I am trying to do:
>
>library(lattice)
>
>print(xyplot(y ~ x,
>              data=data.frame(x=1:10, y=1:10),
>              key=list(points=list(pch=21,
>                                   col="blue",
>                                   cex=3,
>                                   fill="red"))))
>
>Only the key is of interest here. It doesn't match the data and 
>isn't meant to.
>
>On R 2.15.2 and lattice 0.20-10 the circle in the key has a blue 
>outline and a red fill colour. On R 2.15.3 and lattice 0.20-13 the 
>fill is transparent (or white).
>
>The source code for draw.key looks like it is sill trying to support 
>the fill option. I have been able to confirm the old behaviour with 
>the old R and lattice versions on Ubuntu 11.10 and openSUSE 12.2. I 
>have confirmed the new behaviour with the new versions on Ubuntu 
>11.10 and Windows 7.
>
>Many thanks,
>
>Wayne Rochester
>CSIRO, Brisbane, Australia
>
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