On Thu, 27 Jan 2011, Aditya Bhagwat wrote:
Dear Prof. Ripley,
Thanks for your reply.
This is one of the main points of supporting semi-transparent
colours.
You haven't told us your platform or graphics device (see the
posting guide), but plotting with something like
col=rgb(0,0,0,0.2) may work.
I am working on Ubuntu Linux. and I tried the suggested approach but got an
empty plot and the following warning message:
In plot.xy(xy, type, ...) :
semi-transparency is not supported on this device: reported only once per
page
Any suggestions on how to proceed?
Use a device that supports transparency: X11() ought to on a Linux
box, pdf() does everywhere.
Many thanks,
Aditya
On Thu, 27 Jan 2011, Aditya Bhagwat wrote:
Dear all,
When making a plot with the command plot(xVector, yVector),
there are many
points that collide on the same place in the plot. In order to
make this
plot clearer, I have been looking for a way to colour the points
based on
the number of points that fall onto each other. If only one
point falls on a
particular location, make it gray, if many points fall, make it
black.
I tried to search the help archives, but didn't find any useful
answers.
Anyone has any suggestion?
Many thanks for your help!
Aditya
--
Aditya Bhagwat
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PLEASE do read the posting guide
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--
Brian D. Ripley, rip...@stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
--
Aditya Bhagwat
--
Brian D. Ripley, rip...@stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
