I have a collection of SAS code that helps people review large amounts of data on a regular basis. It does this by using SAS's proc gplot with a "by" statement to prepare as many as 400 (yes, 400) separate graphs. The code is run on a remote unix host, and displayed on the reviewer's local desktop using X11 and SAS's display manager. The process is initiated from a web browser. The good side of using proc gplot is that after all 400 have been displayed once, the user can use the PageUp/PageDown keys or the scroll bar to move through the plots, choosing which ones to spend more time with, etc.. It's also reasonably fast. The graphs, all of them, are evidently stored somehow, so that they remain available until SAS is exited. The question is, how close can I come to providing this kind of capability using R or Splus? Displaying each graph once is not a problem, it's the going back and reviewing them part I need ideas for. My current best idea is to shove them all into a pdf file, which can be displayed inline in the reviewer's browser, or possibly downloaded. Thanks for any ideas -Don
Here is an example of what I would do on Windows. First create PNG
files in one folder, like this for example:
library (maptree)
data (oregon.bird.dist)
data (oregon.bird.names)
data (oregon.grid)
data (oregon.border)
for (i in 1:20) {
filename <- paste (row.names (oregon.bird.names)[i], ".png", sep="")
png (filename, width=400, height=380)
group <- oregon.bird.dist[, i] + 1
names (group) <- row.names (oregon.bird.dist)
map.groups (oregon.grid, group, col=c("white", "dark gray"))
lines (oregon.border)
mtext (oregon.bird.names[i, 2], side=3, line=0)
graphics.off ()
}
Then use the freeware viewer XnView which will scroll through images
using the thumb wheel.
Denis White
US EPA, 200 SW 35th St, Corvallis, Oregon, 97333 USA
voice: 541.754.4476, email: white.denis at epa.gov
web: www.epa.gov/wed/pages/staff/white/
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