Hello,
I got bungled up by the fact that an infinite POSIXct object is
represented by NA, but is not, in fact, NA. While an infinitely large
POSIXct object seems strange, perhaps R should use the convention of
representing it as Inf rather than NA to avoid any confusion.
Cheers,
Robert
> x <- as.POSIXct(NA)
> z <- min(x, x, na.rm=TRUE)
Warning message:
In min.default(NA_real_, NA_real_, na.rm = TRUE) :
no non-missing arguments to min; returning Inf
> z
[1] NA
> is.na(z)
[1] FALSE
> is.infinite(z)
[1] TRUE
> R.version
_
platform i686-pc-linux-gnu
arch i686
os linux-gnu
system i686, linux-gnu
status
major 2
minor 6.2
year 2008
month 02
day 08
svn rev 44383
language R
version.string R version 2.6.2 (2008-02-08)
Robert McGehee, CFA
Geode Capital Management, LLC
One Post Office Square, 28th Floor | Boston, MA | 02109
Tel: 617/392-8396 Fax:617/476-6389
mailto:[EMAIL PROTECTED]
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