On Wed, 10 Sep 2008, Yihui Xie wrote:
For the second question, try something like:strptime('12/4/1996','%M/%d/%Y')[1] "1996-09-04 00:12:00" # only date?as.Date(strptime('12/4/1996','%M/%d/%Y'))[1] "1996-09-04"
Why not
as.Date('12/4/1996', format = '%m/%d/%Y')
[1] "1996-12-04" ? (And note the typo in your solution and hence incorrect answer.)
Yihui On Wed, Sep 10, 2008 at 4:22 PM, Giulia Barbati <[EMAIL PROTECTED]> wrote:Dear R-users, I have a couple of questions about the relsurv package: 1) when I try to run the example: fit <- rsmul(Surv(time,cens)~sex+as.factor(agegr)+ratetable(age=age*365.24,sex=sex,year=year),ratetable=slopop,data=rdata) with the datasets in the package (rdata and slopop) it gives me an error: Error in nrow(x) : object "x" not found 2) If I have a date format like:"6/17/1997 " "9/10/1990 " "12/4/1996 " how to convert it in the Rdate format required by ratetable? Thank you very much for help, Giulia-- Yihui Xie <[EMAIL PROTECTED]> Phone: +86-(0)10-82509086 Fax: +86-(0)10-82509086 Mobile: +86-15810805877 Homepage: http://www.yihui.name School of Statistics, Room 1037, Mingde Main Building, Renmin University of China, Beijing, 100872, China ______________________________________________ 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.
-- 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.
