PS Please forgive my ignorance, but when you say:
BTW: you may want to use something like pch=19, cex=0.1 (and maybe add some
alpha to get a quick density estimation).
I don't know what alpha refers to here.
Thanks again.
Best wishes,
Thomas
Cheers,
S
So I guess it might be related to the
"special treatment" of "." described on help(points) ??
---
Value pch="." (equivalently pch = 46) is handled specially. It is a
rectangle of
side 0.01 inch (scaled by cex).
---
I find this behaviour unnerving: the (resized) plots made it look as if
there
was a lot of structure in the data, but on closer inspection it turned out
to be
entirely a consequence of the quartz device and plot function!
I can't imagine that this behaviour is intended - even if it were intended
to
suppress points (like some axis labels) - it seems strange that enlarging
the
window makes points disappear. (I also tried setting dpi=72 in quartz(),
but
this did not fix the problem).
Thanks in advance.
Thomas
------------------------------------------------------
sessionInfo()
R version 2.9.0 (2009-04-17)
i386-apple-darwin8.11.1
locale:
en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8
attached base packages:
[1] stats graphics grDevices utils datasets methods base
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