[R] ACCESS R and dates

[Prof Brian Ripley]

On Fri, 30 Sep 2005, sloan jones wrote:

> I have used the RODBC package to read in data I have stored in an Access 
> file. When I am using data from files other than ACCESS I have no 
> problem using the survival package to work with dates; however, with the 
> ACCESS data the dates are reading-in in the following format: 
> "2004-02-11 Pacific Standard Time". How do I remove the "Pacific 
> Standard Time" part in ACCESS or R so that I can coerce the data into a 
> workable format?  Any suggestions?

If this really is a character vector and not the result of printing a 
"Date" object, see ?strftime.  But you haven't told us anything like 
enough to go on.

As far as I know the survival package expects numeric values (e.g. of days 
or years) and not dates as implemented in R, except for survexp() which 
wants a different format, that of the 'dates' package (which it partially 
incorporates).

-- 
Brian D. Ripley,                  ripley at 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 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595