[R] Graphics with moderately large amounts of data

Frank, Murray murray.frank at commerce.ubc.ca
Mon Dec 10 22:04:43 CET 2001


Hi,

A major attraction to R and to S-plus are the graphics. (Up to now my
experience is with 
STATA and SAS.) Most of the graphical examples that I have seen in the
documentation 
are for relatively small size data sets. I am working with a moderately
large data set -- 
the order of magnitude is 180,000 observations by 50 variables. There seem
to be standard 
problems that I keep bumping into in the graphics: eg. the graphics work
hard to accomodate 
outliers leaving the main action area a thick cloud, very slow operations by
R, etc. I have 
been doing some obvious things to deal with these issues, eg. trimming,
restricting attention 
to data subsamples, etc. But these must be pretty standard issues. I would
like to take 
advantage of what is already known. What should I be reading that explains
how best to
do graphics with a somewhat larger data set? (Pointers to an appropriate FAQ
would be 
great since I have looked but not managed to find it.)

Thanks in advance for any advice.

Thanks.
Murray.

Murray Z. Frank
Faculty of Commerce
University of British Columbia
Vancouver, B.C.
Canada V6T 1Z2

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