plotmeans in trellis view?

DougB

Mon, Apr 26, 2010 2:36 PM #

Is there a way to use plotmeans function of Gplots in a trellis view with the
trellis groups defined by a column?

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Sam Albers

Mon, Apr 26, 2010 3:58 PM #

I'm not sure about "plotmeans" but this is usually the way I plot means with
lattice:

library(lattice)
x <-  runif(48, 2, 70)
data <- data.frame(x)
data$factor1 <- factor(c("A", "B", "C", "D"))
data$factor2 <- factor(c("X", "Y", "Z"))
data.mean <- with(data, aggregate(data$x, by=list(factor1=factor1,
factor2=factor2), mean))
with(data.mean, xyplot(x~factor1 | factor2))

Is this sort of what you were looking for?

HTH,

Sam

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