Have you tried c() from the latticeExtra package?
It worked for me (see below)
library(grid)
library(lattice)
x <- seq(0, 10, length=100)
y <- sin(x)
y2 <- 10*sin(x)
f <- rep(c("1", "2"), each=50)
p1 <- xyplot(y~x,groups=f, ylab="BIG LABEL",
# auto.key=list(space="right"),
par.settings = list(layout.width = list(panel=1, ylab = 2, axis.left
=1.0, left.padding=1,
ylab.axis.padding=1, axis.panel=1)))
p2 <- xyplot(y2~x, ylab="a",
par.settings = list(layout.width = list(panel=1, ylab = 2, axis.left
=1.0, left.padding=1,
ylab.axis.padding=1, axis.panel=1)))
library(latticeExtra)
update(c(p2, p1, x.same = TRUE),
layout = c(1, 2),
ylab = list(c("a", "BIG LABEL"), y = c(1/6, 2/3)),
par.settings = list(layout.heights = list(panel = c(1, 2))))
Hope this helps,
baptiste
On 25 Jan 2009, at 09:54, Daniel Myall wrote:
Dear R-help,
I am creating a two lattice plots (a densityplot() and xyplot()) that
have the same x-axes and then 'printing' them onto the same page, one
above the other (see end of email for an example to generate the
graph).
With different labels on the y-axis for each plot the left spacing is
different, and the x-axes don't align vertically. Although I can
manually modify the print region of the plots on the page to align the
x-axes, this is not very robust; as can be expected changing the
size of
the plot device scales the x-axes differently in both plots.
Additionally, changing devices also causes issues (i.e., the plots are
aligned in quartz(width=12,height=6) but then slightly off with
pdf(width=12,height=6)). As I'm using this inside Sweave to generate
numerous plots of this form, I am after some robust way to vertically
align the x-axes of the plots.
With the approach I'm taking is there a way with lattice or grid to
vertically align the x-axes? By somehow setting the internal plot
width
to be the same in both plots I think this would solve the issue
(possibly by setting the right parameters in
str(trellis.par.get("layout.widths")))? Alternatively, would another
approach be better (i.e., is it possible to create a new panel
function
that does a panel.xyplot and panel.densityplot on slightly different
data?).
Thanks.
Daniel
## BEGIN Example
#OS: Mac OS X 10.5.5; R: 2.8.1; lattice 0.17-20
library(reshape)
library(lattice)
plotdensitymeans <-
function(data,measure,factors=c('subject_group','task'),
xlab="",xlim=NULL, ...) {
# Create means by subject
x.melted <- melt(data, id.var = append(factors,'subject_ID'),
measure.var=measure,na.rm=T)
formula.bysubject.cast <- paste(factors[1],"+",factors[2],"+
subject_ID ~ .")
x.cast.subject <- data.frame(cast(x.melted,formula.bysubject.cast,
mean))
# Plot means by subject
text.formula <- paste(factors[1],":",factors[2],"~ X.all.")
text.group <- paste(factors[1],":",factors[2])
formula.xyplot <- as.formula(text.formula)
formula.group <- as.expression(formula.xyplot)
environment(formula.xyplot) <- environment()
plot.subject.means <- xyplot(formula.xyplot,
group=eval(formula.group), xlim=xlim, pch=16, alpha=0.6,data =
x.cast.subject,xlab=xlab,ylab="")
# Plot distributions
formula.densityplot <- as.formula(paste(" ~",measure[1]))
environment(formula.densityplot) <- environment()
plot.density <-
densityplot(formula.densityplot,group=eval(formula.group),data=data,
xlim=xlim,n=200,auto.key=list(columns =
4,line=TRUE),plot.points=F,xlab="",lty=1,
scales=list(y=list(draw=FALSE),x=list(draw=FALSE)))
# Plot both plots on a single page
print(plot.subject.means, position = c(0,0,1,0.35))
print(plot.density, position = c(0.0988,0.22,0.98,1), newpage =
FALSE)
}
example.data <- data.frame(subject_ID = c('A01','B01','A02','B02'),
subject_group = c('pop1','pop2'),
task=
c(rep('task1',32),rep('task2',32)),dependent_measure=rnorm(64))
plotdensitymeans(example.data, measure=c('dependent_measure'),
xlab="dependent measure (units)", xlim=c(-3,3))
##END Example
---
Daniel Myall
PhD Student
Department of Medicine
University of Otago, Christchurch
Van der Veer Institute for Parkinson's and Brain Research
66 Stewart St
Christchurch
New Zealand
daniel.my...@vanderveer.org.nz
http://www.vanderveer.org.nz/
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
_____________________________
Baptiste Auguié
School of Physics
University of Exeter
Stocker Road,
Exeter, Devon,
EX4 4QL, UK
Phone: +44 1392 264187
http://newton.ex.ac.uk/research/emag
______________________________________________
R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
