You need to give the format -- '1-Apr-08' might mean 2008-04-01 or
2001-04-08, and R refuses to guess.
Please *do* read the help file (e.g. as.Date) before posting: the
international standard format is 2008-04-11, and Australia has adopted
that standard.
On Fri, 11 Apr 2008, Bob Green wrote:
> Hello,
>
> I was hoping for advice regarding resolving the above error.
Telling R what you intend is the usual way to resolve user errors caused
by ambiguous input.
>
> I have a csv file that contains the following variable:
>
> $ Order.Made.Date : Factor w/ 299 levels
> "1-Apr-08","1-Aug-05",..: 278 285 91 286 159 132 108 261 282 147 ...
>
>
> I want to calculate a variable named F.length, which is today's date
> minus the values contained in the variable: April$Order.Made.Date)
> I tried altering the date format but continued to receive the same error.
>
> > F.length <- difftime ("11/04/2008", April$Order.Made.Date)
> > Error in fromchar(as.character(x)) : character string is not in
> a standard unambiguous format
>
> > Order.date <- as.Date (April$Order.Made.Date)
> > Error in fromchar(x) : character string is not in a standard
> unambiguous format
> > Order.date <- 'as.POSIXlt' (April$Order.Made.Date)
> Error in fromchar(as.character(x)) : character string is not in a
> standard unambiguous format
>
> Any suggestions are appreciated,
>
> Bob
--
Brian D. Ripley, [EMAIL PROTECTED]
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 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
______________________________________________
R-help@r-project.org mailing list
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.
