[Rpy] Help w/ a chart with dates for an X axis..

[Wells Oliver]

I currently have the following R script that works in console.
results <- fetch(dbSendQuery(con, query), n=-1)
results$date <- as.POSIXct(results$date)

plot(results$date, results$DIFF, ylab="Run differential", xlab="2009",
xaxt="n")
axis.POSIXct(1, at=seq(min(results$date), max(results$date), length=5),
format="%b %d", lwd=0, lwd.ticks=1.5)
lines(results$date, results$DIFF, type="l", lwd=1.5, col="red", pch=15)
title(main="Run differential for the 2009 Seattle Mariners")

However, in my python script, I'm doing the query w/ MySQLdb, and then
trying:

r.png('%s%d.png' % (path, team_id), width=450, height=450)
r.plot(dates, diff, ylab='Run differential', xlab='2009', xaxt='n')
r.lines(dates, diff, col='red', lwd='1.5.')


Where diff and dates are lists of values: diff being numeric, and dates
being a list of datetime.date objects, for which python errors:

ValueError: Nothing can be done for the type <type 'datetime.date'> at the
moment.

However, making these strings errors like:

rinterface.RRuntimeError: Error in plot.window(...) : need finite 'xlim'
values

Which is what happens when you don't run the "results$date <-
as.POSIXct(results$date)" line in the R script.

Any ideas on how I can properly translate the R bit to rpy? Thanks!

-- 
Wells Oliver
we...@submute.net

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