Hi, I'm looking for a way to use densityplot in the lattice package on Date
data or manipulate the labels for tick marks.
Here's an example:
#generate psuedo dates
dat.Date <- as.Date('2009-12-31')+as.integer(abs(rnorm(10000))*100)
#convert to a julian date for densityplot
#because it doesn't do Date or POSIX.. objects
densityplot(as.numeric(format(as.Date(dat.Date), "%j")),
plot.points=F)
My conversion to julian date here was only to 'force' densityplot to
plot
some Date data
My question specifically is:
How could I express the X axis in this figure as Dates
perhaps sequenced by month (e.g. '2010-01-01', '2010-02-01',
etc).
I could do this with the base R graphics but am at a loss with lattice
densityplot.
Thanks for any advice in advance!
JT
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