[R] Conditionally Updating Lattice Plots
Bryan Hanson
hanson at depauw.edu
Sun Jul 20 18:44:25 CEST 2008
Hi All...
I can¹t seem to find an answer to this in the help pages, archives, or
Deepayan¹s Lattice Book.
I want to do a Lattice plot, and then update it, possibly more than once,
depending upon some logical options. Code below; it produces a second plot
page when the second update is called, from which I would infer that you
can't update the update or I'm not calling it correctly. I have a nagging
sense too that the "real" way to do this is with a non-standard use of
panel.superpose but I don't quite see how to do that from available
examples.
TIF for any suggestions, Bryan
************ Example: a function then, the call to the function
fancy.lm <- function(x, y, fit = TRUE, resid = TRUE){
model <- lm(y ~ x)
y.pred <- predict(model) # Compute residuals for plotting
res.x <- as.vector(rbind(x, x, rep(NA,length(x)))) # NAs induce breaks in
line
res.y <- as.vector(rbind(y, y.pred, rep(NA,length(x)))) # after Fig 5.1 of
DAAG (clever!)
p <- xyplot(y ~ x, pch = 20,
panel = function(...) {
panel.xyplot(...) # not strictly necessary if I understand correctly
})
plot(p, more = TRUE)
if (fit) {
plot(update(p, more = TRUE,
panel = function(...){
panel.xyplot(...)
panel.abline(model, col = "red")
}))}
if (resid) {
plot(update(p, more = TRUE,
panel = function(...){
panel.xyplot(res.x, res.y, col = "lightblue", type = "l")
}))}
}
x <- jitter(c(1:10), factor = 5)
y <- jitter(c(1:10), factor = 10)
fancy.lm(x, y, fit = TRUE, resid = TRUE)
************ Session Info
> sessionInfo()
R version 2.7.1 (2008-06-23)
i386-apple-darwin8.10.1
locale:
en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8
attached base packages:
[1] datasets grid grDevices graphics stats utils methods
[8] base
other attached packages:
[1] fastICA_1.1-9 DescribeDisplay_0.1.3 ggplot_0.4.2
[4] RColorBrewer_1.0-2 reshape_0.8.0 MASS_7.2-42
[7] pcaPP_1.5 mvtnorm_0.9-0 hints_1.0.1-1
[10] mvoutlier_1.3 robustbase_0.2-8 lattice_0.17-8
[13] rggobi_2.1.9 RGtk2_2.12.5-3
loaded via a namespace (and not attached):
[1] tools_2.7.1
More information about the R-help
mailing list