Sundar Dorai-Raj wrote:
RenE J.V. Bertin wrote:
Hello, and (somewhat belated) best wishes for 2005.
Can one order not to draw outliers in bwplot, or at least exclude them
from the vertical axis scaling? If so, how (or what doc do I need to
consult)?
The options that have this effect in boxplot() do not appear to have
any effect with bwplot (although outline=FALSE in boxplot does *not*
change the scaling).
Thanks,
RenE Bertin
RenE,
There may be other solutions but you can do this using the prepanel
option to set the ylim:
library(lattice)
set.seed(1)
z <- data.frame(x = rt(100, 1), g = rep(letters[1:4], each = 25))
bwplot(x ~ g, z,
prepanel = function(x, y) {
bp <- boxplot(split(y, x), plot = FALSE)
ylim <- range(bp$stats)
list(ylim = ylim)
})
If you actually want to exclude the points (rather than just prevent
outliers from affecting the scale), you will have to modify the
panel.bwplot function in addition to using the above.
--sundar
You may also want to try
library(Hmisc)
library(lattice)
bwplot(..., panel=panel.bpplot)
?panel.bpplot
--
Frank E Harrell Jr Professor and Chair School of Medicine
Department of Biostatistics Vanderbilt University
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