On Fri, 12 Jan 2001, Uwe Ligges wrote:
ripley@stats.ox.ac.uk wrote:
On Thu, 11 Jan 2001 stephen@anc.ed.ac.uk wrote:
Hi,
The help file for strptime has the following code which doesn't work
for me:
## read in date info in format `ddmmmyyyy'
x <- c("1jan1960", "2jan1960", "31mar1960", "30jul1960")
z <- strptime(x, "%d%b%Y")
z
[1] "NA" "NA" "NA" "NA" Do these work for other people?
Yes, on several platforms. It will be a problem with your OS's strptime code. It must be, I think, as the alternative we supply works.
whereas it works fine if I use a separator (/) in the date@
strptime("9/Feb/1960", "%d/%b/%Y")
[1] "1960-02-09"
strptime("9Feb1960", "%d%b%Y")
[1] "NA"
We really do not put out new features without testing them!
Also very strange on WinNT4.0 (R-1.2.0):
x <- c("1jan1960", "2jan1960", "31mar1960", "30jul1960")
z <- strptime(x, "%d%b%Y")
z
[1] "1960-01-01 01:00:00" "1960-01-02 01:00:00" "NA"
"1960-07-30 01:00:00"
I don't get the NA. The 1am is a Windows bug: this only happens in times prior to 1970, which for Windows do not exist. It seems to assume that if isdst is non-zero, it is DST, rather than for isdst > 0. I have a workaround, so for 1.2.1 (on my machines) this will behave as expected. The date-time functions do depend on OS functions being correct, and although I have done a lot of workarounds, no doubt more errors will emerge.
Brian D. Ripley, ripley@stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272860 (secr) Oxford OX1 3TG, UK Fax: +44 1865 272595 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-devel-request@stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._