On 2011-04-09 06:21, Dennis Murphy wrote:
Hi:
One hopes that there is a more elegant solution than this bit of ad-hockery.
From your posted example:
f1<- c(rep(c(rep("a", 3), rep("b", 3), rep("c", 3)), 2))
f2<- c(rep("A", 9), rep("B", 9))
dv<- c(0.9, 0.8, 0.85, 0.6, 0.65, 0.7, 0.8, 0.85, 0.8, 0.95, 0.85,
0.9, 0.65, 0.7, 0.75, 0.85, 0.9, 0.85)
df<- data.frame(f1, f2, dv)
df$lab<- rep(1:6, each = 3)
df$lab2<- ''
df$lab2[seq(1, 16, by = 3)]<- 1:6 # adapt to your situation - seq(1,
nrow(df) - 63, by = 64), perhaps
bwplot(dv ~ f1 | f2, data = df, ylim = c(0.5, 1),
panel = function(x, y, ..., subscripts) {
lab<- df$lab2[subscripts]
panel.bwplot(x, y, ...)
panel.text(x, 0.55, labels = lab)
}
)
Alternatively, panel.text() takes an alpha = argument; for example,
bwplot(dv ~ f1 | f2, data = df, ylim = c(0.5, 1),
panel = function(x, y, ..., subscripts) {
lab<- df$lab[subscripts]
panel.bwplot(x, y, ...)
panel.text(x, 0.55, labels = lab, alpha = 0.5)
}
)
You could toy with the value of alpha until something acceptable emerges.
But as I said, there is probably a better solution and I'm happy to be
educated if there is.
Here's a slight variation on your first solution which doesn't
require the data to be appropriately sorted, using your df:
bwplot(dv ~ f1 | f2, data = df, ylim = c(0.5, 1),
panel = function(x, y, ..., subscripts) {
lab <- df$lab[subscripts]
lab[duplicated(lab)] <- ""
panel.bwplot(x, y, ...)
panel.text(x, 0.55, labels = lab)
}
)
and another variation which sets the text positions to NA for
all but the first pass through the panel.text() function:
bwplot(dv ~ f1 | f2, data = df, ylim = c(0.5, 1),
panel = function(x, y, ..., subscripts) {
at.y <- rep(0.55, nrow(df))
is.na(at.y) <- which(duplicated(df$lab))
panel.bwplot(x, y, ...)
panel.text(x, at.y[subscripts], labels = df$lab[subscripts])
}
)
I think that the alpha argument is too one-off, i.e. dependent on
how many levels in the boxplot.
Peter Ehlers
HTH,
Dennis
On Sat, Apr 9, 2011 at 4:56 AM, Jeff Stevens<stev0...@googlemail.com>wrote:
Hi,
Thanks for the work around, Dennis. My actual data set has 64
replicates for each factor level combination (rather than the 3 in the
example), so the overplotting is quite messy. Any ideas on how to
avoid the overplotting?
Jeff
On Fri, Apr 8, 2011 at 7:32 PM, Dennis Murphy<djmu...@gmail.com> wrote:
Hi:
After a number of false starts, I finally consulted Deepayan's book and
the
example on p. 73, suitably adapted, yielded a solution. Add a variable
for
the labels and then...
df$lab<- rep(1:6, each = 3)
bwplot(dv ~ f1 | f2, data = df, ylim = c(0.5, 1),
panel = function(x, y, ..., subscripts) {
lab<- df$lab[subscripts]
panel.bwplot(x, y, ...)
panel.text(x, 0.55, labels = lab)
}
)
If you look closely, you'll see that each label is overplotted three
times.
A similar plot in ggplot2 would be
library(ggplot2)
ggplot(df, aes(x = f1, y = dv)) + geom_boxplot() +
geom_text(aes(x = as.numeric(f1), lab = lab), y = 0.55, alpha = 0.5)
+
facet_wrap( ~ f2) + ylim(0.5, 1)
The alpha argument in geom_text() is designed to mitigate the
overplotting
effect somewhat.
HTH,
Dennis
On Fri, Apr 8, 2011 at 5:32 AM, Jeff Stevens<stev0...@googlemail.com>
wrote:
Hi,
I am trying to add text to the bottom of a lattice bwplot with
multiple panels. I would like to add a label below each boxplot, but
the labels do not come from the data. I've tried the following, code:
f1<- c(rep(c(rep("a", 3), rep("b", 3), rep("c", 3)), 2))
f2<- c(rep("A", 9), rep("B", 9))
dv<- c(0.9, 0.8, 0.85, 0.6, 0.65, 0.7, 0.8, 0.85, 0.8, 0.95, 0.85,
0.9, 0.65, 0.7, 0.75, 0.85, 0.9, 0.85)
df<- data.frame(f1, f2, dv)
lab<- c(1, 2, 3, 4, 5, 6)
bwplot(dv ~ f1 | f2, data = df, ylim = c(0.5, 1),
panel = function(x, y, ...) {
panel.bwplot(x, y, ...)
panel.text(x, 0.55, labels = lab)
}
)
I have two problems. First, the label values are writing over one
another. I wrote a horrible hack (below) that fixes that problem, but
I would like to know if there are better/more flexible ways to do
this.
bwplot(dv ~ f1 | f2, data = df, ylim = c(0.5, 1),
panel = function(x, y, ...) {
x2<- as.factor(c("a", "b", "c"))
panel.bwplot(x, y, ...)
panel.text(x2, 0.55, labels = lab)
}
)
Second, when using the horrible hack the first values are repeated in
the second panel. How do I display the correct values in the second
panel? The subscripts argument seems to do the trick when the labels
come from the data, but how do I get the proper values when the labels
come from outside of the data?
Many thanks,
Jeff
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--
Jeff Stevens
Center for Adaptive Behavior and Cognition
Max Planck Institute for Human Development
Lentzealle 94
14195 Berlin, Germany
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______________________________________________
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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.
______________________________________________
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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.
