Wayne Rochester
2013-Mar-12 01:11 UTC
[R] Specifying point symbol fill colour in lattice xyplot keys
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
Duncan Mackay
2013-Mar-12 04:37 UTC
[R] Specifying point symbol fill colour in lattice xyplot keys
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
>
>______________________________________________
>R-help at r-project.org mailing list
>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.
>
Wayne Rochester
2013-Mar-18 03:10 UTC
[R] Specifying point symbol fill colour in lattice xyplot keys
Dear Duncan, Many thanks for that advice. It looked like it should work, but it only affected the points on the graph, and not the ones on the key. Looking at the lattice source, the draw.key function doesn't seem to consult many settings. I'm now pretty confident that the fill parameter is not having an affect due to a small bug in the lattice draw.key function. Within the draw.key function there's a function called process.key, whose return value provides a template that determines which parameters from the 'points' key item will be copied to the output key. It takes a bunch of arguments, including 'fill', and includes all arguments -- except for 'fill' -- in its return value. If I add 'fill=fill' to its return value list, then my example code works as expected. Best wishes, Wayne Rochester CSIRO, Brisbane, Australia -------- Original Message -------- Subject: Re: Specifying point symbol fill colour in lattice xyplot keys From: Wayne Rochester <wayne.rochester at csiro.au> To: Wayne Rochester <Wayne.Rochester at csiro.au> Date: 18/03/13 11:54> 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 > -------- Original Message -------- > Subject: Specifying point symbol fill colour in lattice xyplot keys > From: Wayne Rochester <wayne.rochester at csiro.au> > To: R-help <r-help at r-project.org> > Date: 12/03/13 11:11 >> 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 >-- Dr Wayne Rochester Research Scientist CSIRO Marine and Atmospheric Research Level 1 Block B Ecosciences Precinct GPO Box 2583 Brisbane Qld 4001 Phone: +61 (0)7 3833 5943 Fax: +61 (0)7 3833 5501 E-mail: wayne.rochester at csiro.au WWW: http://www.csiro.au/