(Why is this an R-devel topic?)
When you resize a plot (and sometimes when the graph is repainted), the
display list is replay-ed. So if you force delayed evaluation, you get
evaluation when the list is replay-ed. So the 'strange' thing is that
you think delaying evaluation is a good idea. Use substitute, as the R
help pages advise. E.g.
par(mfrow = c(1,3))
for (i in 1:3){
title <- substitute(gamma[j], list(j=i))
plot(1:10, main = title)
}
On 24/11/2011 08:54, Mathieu Ribatet wrote:
Dear list,
I found a strange behavior of the graphic display when using bquote to set a
title to a plot. The problem arise when you manually resize the graphic window
using the mouse. It happens on both quartz and x11 devices. Here's a
reproducible example:
par(mfrow = c(1,3))
for (i in 1:3){
title<- as.expression(bquote(gamma[.(i)]))
plot(1:10, main = title)
}
Once you ran the code, the figure displays as expected --- each title is
$\gamma_i$, $i=1, 2, 3$. Now if you resize manually the graphic window using
the mouse all the titles will be set to $\gamma_3$.
In case this is useful, here's the ouput of sessionInfo().
sessionInfo()
R version 2.14.0 (2011-10-31)
Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)
locale:
[1] C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
Best,
Mathieu
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