[R] customizing the color and point shape for each line drawn using lattice's xyplot
Ross Darnell
r.darnell at uq.edu.au
Thu Aug 30 07:56:36 CEST 2007
Does this help
common.without.Method4 <- subset(common, Method!=4)
xyplot(MeanBxg ~ PercentVarExplained | bdg.f * bdx.f,
data=common.without.Method4,
groups=Method.f, type="l", auto.key=T)
Ross Darnell
-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Gen
Sent: Thursday, 30 August 2007 2:51 PM
To: r-help at stat.math.ethz.ch
Subject: [R] customizing the color and point shape for each line drawn
using lattice's xyplot
Description of what I am trying to do:
I am using the xyplot code below to plot the variable "MeanBxg" against
the
variable "PercentVarExplained" for all 9 possible combinations of
variables
"bdg" and "bdx". Within each of these 9 scenarios I am plotting a
separate
line for each of up to 9 different methods that I used to estimate the
variable MeanBxg. These methods are identified by the numeric variable
called "Method." Giving me one plot with 9 figures and each of the
figures
contains 9 lines.
My problem arises because I would like to repeat the creation of this
plot 8
times, in each instance only a subset (eg 6) of the 9 methods are used
(a
different subset each time).
What I can't figure out:
I would like to learn how to specify the exact line color that
corresponds
to each method such that Method==1 will always be represented by the
same
color (in every plot that it appears in). Where two methods that I used
were of the same family of methods (say method==1 and method==2 made the
same assumptions about the data) I would like to, if possible,
represent
the two methods using the same color and distinguish them by the symbol
used
to represent points on the line.
My code as it currently stands:
xyplot(MeanBxg ~ PercentVarExplained | bdg.f * bdx.f, data=common,
groups=common$Method.f, type="l", subset= Method!=4, auto.key=T)
As the code is, the default colors assigned are repeated causing
different
methods to be represented by the same color with no way to distinguish
them
(I have not succeeded in plotting lines and points simultaneously).
Side question: When I subset the data to particular methods, is there a
way
to remove the excluded methods from the key as well? (in my code
"Method" is
a numeric variable, and "Method.f" corresponds to the lengthy
descriptions
of each method for the purpose of the key)
Thank you very much for your help.
Genevieve
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