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posix_ct_
2011 Mar 25
2
Preserving the class of POSIXt objects
...t;- as.POSIXct("2011-03-25 21:03:20")+1:10
length(foo) ## obviously 10
length(trunc(foo, "day")) # 1!
This makes it impossible to use [ and length() with trunc'ed POSIXct
vectors (and it is a little unexpected too that the result of using
trunc with a POSIX_ct_ object is a POSIX_lt_ object) but the cure
seems easy: in the code of [.POSIXt,
## old ## new
x$sec <- 0 ## x$sec[] <- 0
x$min <- 0L ## x$min[] <- 0L
x$hour <- 0L ## x$hour[] <- 0L
After these changes, [ and length would wor...