On Oct 2, 2015, at 2:33 AM, Duncan Murdoch wrote: > On 01/10/2015 11:29 PM, Rolf Turner wrote: >> On 02/10/15 15:47, David Winsemius wrote: >> >> <SNIP> >> >>> On Oct 1, 2015, at 6:22 PM, Rolf Turner wrote: >>>> >>>> P.S. I have been unable to find a corresponding vector of the names >>>> of the days of the week, although I have a very vague recollection >>>> of the existence of such a vector. Does it exist, and if so what >>>> is it called? >>> >>> It's could called up by strptime because it is mapped to a character >>> vector by the internationalization database: >>> >>>> format( as.Date(1:7)+2, format="%A") >>> [1] "Sunday" "Monday" "Tuesday" "Wednesday" "Thursday" >>> "Friday" [7] "Saturday" >> >> <SNIP> >> >> When I try that (copying and pasting your code so that there's no chance >> of fumble-fingering) I get: >> >>> Error in as.Date.numeric(1:7) : 'origin' must be supplied >> >> Why do these things always happen to *me*??? > > The zoo package replaces as.Date.numeric() with a function that assumes > an origin of "1970-01-01". There may be other packages that also make a > replacement like this. David appears to have one of them attached, and > you don't.
Quite right, Duncan. I failed to include the <environment: namespace:zoo> even though it was staring me in the face. My wife says I have an extreme case of "refrigerator blindness" which now seems to be spreading to other areas of my cognitive activities. Sorry, Rolf. -- David. > > Duncan Murdoch > David Winsemius Alameda, CA, USA ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
