under Ubuntu 9.04 R seems to be very slow at plotting.
the example below illustrates with a plot of error bars of sample means
where i watch as each error bar is plotted one at a time. very annoying and
pain in the neck when running Sweave repeatedly.
running R 2.9.1 under Windoze on the same machine the error bars plotted in the
code below appear instantaneously.
has anyone else noticed this problem under Ubuntu 9.04?
# make a load of means:
J<- 100
mu<- .02
sigma<- .04
set.seed(1)
y.bar<- rnorm(J, mean=mu, sd=sigma)
# make a load of (fake) stds about the means:
n.j<- round(runif(J, min=10, max=100))
sigma.alpha<- sqrt(var(y.bar) / n.j)
ylim<- range(c(y.bar-2*sigma.alpha, y.bar+2*sigma.alpha))
par(las=1)
plot(n.j, y.bar, cex.lab=.9, cex.axis=1,
xlab="sample size",
ylab="some stuff",
pch=20, log="x", cex=.5, ylim=ylim,
)
# HERE'S THE PROBLEM: ON UBUNTU R IS TAKING FOREVER TO PLOT THESE ERROR
BARS
for (j in 1:J) {
lines(rep(n.j[j],2), y.bar[j] + c(-2,2)*sigma.alpha[j],
lwd=1.25, col="darkgray")
}
abline(h=mu)
title("Why is R so slow at plotting these error bars on Ubuntu?",
cex.main=1.2, line=1)
R version 2.9.1 (2009-06-26) i486-pc-linux-gnu
locale:
LC_CTYPE=en_US.UTF-8;LC_NUMERIC=C;LC_TIME=en_US.UTF-8;LC_COLLATE=en_US.UTF-8;LC_MONETARY=C;LC_MESSAGES=en_US.UTF-8;LC_PAPER=en_US.UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=en_US.UTF-8;LC_IDENTIFICATION=C
attached base packages: [1] graphics grDevices utils datasets stats
methods base
other attached packages: [1] zoo_1.5-8 loaded via a namespace (and not
attached): [1] grid_2.9.1 lattice_0.17-25
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