Dear all
I just encountered a strange behaviour trying to plot lattice xyplot with
dates on x axis
xyplot(rnorm(10)~seq(as.Date("2000/1/1"), by="month",
length=10)|sample(1:2, 10, replace=T))
Warning message:
is.na() applied to non-(list or vector) in: is.na(x)
and no points were plotted.
If x is numeric everything is OK.
So my question is if lattice plotting can be done with Date or POSIX or
other time related values as x axis.
W XP, R 2.6.0
BTW I will try it in 2.7.0 devel at home as it seems to me that in 2.7.0
it worked.
Petr Pikal
[EMAIL PROTECTED]
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