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2010 Oct 28
1
Unexpected behabiour of min, tapply and POSIXct/POSIXlt classes?
Hello,
I found rather surprising the behaviour of POSIXct and POSIXlt classes
when combined with min and tapply.
The details can be deduced from the script below:
############# Start of the script ####################
before <- Sys.time()
Sys.sleep( 1 )
now1 <- now2 <- Sys.time()
my.times <- c( before, now1, now2 )
class( my.times ) ## [1] "POSIXct" "POSIXt"
min( my.times ) ## [1] "2010-10-28 18:52:17 CEST"
### So far, so good... but:
my.period <- c( "a", "b", "b" )
tapply( my.ti...
2003 Jul 31
4
timezones
I have some questions and comments on timezones.
Problem 1.
# get current time in current time zone
> (now <- Sys.time())
[1] "2003-07-29 18:23:58 Eastern Daylight Time"
# convert this to GMT
> (now.gmt <- as.POSIXlt(now,tz="GMT"))
[1] "2003-07-29 22:23:58 GMT"
# take difference
> now-now.gmt
Time difference of -5 hours
Note that the difference
2006 Sep 11
1
Bug#381481: aptitude: FTBFS: test failure
reassign 381481 aptitude
thanks
> On Fri, Aug 11, 2006 at 06:54:43AM -0700, Daniel Burrows wrote:
> > > | ......................
> > > | rval == -1080447064
> > > |
> > > | now2.tv_sec == 1155053066
> > > | now.tv_sec + 2 == 1155053066
> > > | now2.tv_usec == 882203
> > > | now.tv_usec == 887661
> > > | F.............
> >
> > Hm. I'm inclined to close this as a bug in xen --
> > pthread_cond_timedwai...