Quoting Duncan Murdoch <murdoch.dun...@gmail.com>:
On 21/10/2010 1:23 PM, j.delashe...@ed.ac.uk wrote:
Quoting Duncan Murdoch<murdoch.dun...@gmail.com>:
j.delashe...@ed.ac.uk wrote:
I have just started using the package 'rgl' to explore my data as a
3D scatterplot.
It's a great tool. But I would like to be able to save some graph
views and it appears the only format available is 'png' and it
doesn't look that nice. It is excellent to work with on screen and
explore/play, but when it comes to producing a good quality
graphic I'm a bit disappointed.
So the questions I have are:
1) is there a way to render the graph in the RGL device as a high
quality graphic?
You can use rgl.postscript for various other formats, but you may find
the bitmap output is better. In particular, shading is not always done
correctly.
Duncan Murdoch
Hi Duncan,
thanks for that.
Stupidly I hadn't realised only part of the manual had printed so I
was missing a lot of interesting options, not only this one but others
to animate views.
The type of plots I'm producing are similar to these:
library(rgl)
m<-matrix(rnorm(900),ncol=3)
plot3d(m,col=rainbow(6),type="s",size=0.8)
I tried rgl.postscript to save to pdf, as it's become my default
format when I want smooth plots using standard R graphics X11()
It looks smoother, but I get some "artifacts" in that the edges and
colouring of a number of spheres are rough, or incompletely coloured
(imagine a small scratch on a photograph)
using 'rgl.snapshot' to output a bitmap (png) with small spheres it
doesn't look that great. The default squares look fine 'though.
The way I usually save output is to use rgl.snapshot after increasing
the size of the window as large as possible. At 1000 x 1000 pixels I
find the output okay.
How large is possible will depend on your hardware and OpenGL driver.
Usually you can't make it any bigger than your physical monitor, and
you can't always make it that big.
Duncan Murdoch
It's working pretty nicely for me, enlarging the window like you say.
I have an interesting looking set of data that I was able to explore
very easily using different thresholds/colour codes and I just made a
pretty cool figure. Surprisingly easy once I had the whole manual
printed in front of me and with your comments.
Again, many thanks for your help and your work in the 'rgl' package!
best,
Jose
--
Dr. Jose I. de las Heras Email: j.delashe...@ed.ac.uk
The Wellcome Trust Centre for Cell Biology Phone: +44 (0)131 6507095
Institute for Cell & Molecular Biology Fax: +44 (0)131 6507360
Swann Building, Mayfield Road
University of Edinburgh
Edinburgh EH9 3JR
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Scotland, with registration number SC005336.
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