I am using the chron package. I have no preference for which function I use. I just want the most reliable format for HMisc functions and general plotting. I like the ddmonyyy formats (e.g. 11NOV2003). What would you recommend?
Thank you! Quoting Frank E Harrell Jr <[EMAIL PROTECTED]>: > On Tue, 11 Nov 2003 18:28:24 -0500 > [EMAIL PROTECTED] wrote: > > > Hello, > > > > I am trying to use HMisc describe on a data frame. I have specified > > certain variables as dates using, for example: > > > > df1$aidsdate <- dates(aidsdate,format="day.mon.year", > > origin=c(month = 1, day = 1, year = 1960)) > > > > When I use describe on the dataframe I get this error: > > > > Error in Ops.dates(weights, x) : * not defined for chron objects > > > > Has anyone had this problem? I had used the same method with an older > > version of R and HMisc and it worked. > > > > Should be be formatting date variables differently? > > > > Thank you! > > > > Sincerely, > > Tanya Murphy > > > > In recent versions, describe for R recognizes date/times by one of the > following classes: 'POSIXt','POSIXct','chron'. If you really need to use > another date format I could be talked into extending the code for that if > you can remind me where dates( ) is found. -Frank > > --- > Frank E Harrell Jr Professor and Chair School of Medicine > Department of Biostatistics Vanderbilt University > ------------------------------------------------- This mail sent through IMP: http://horde.org/imp/ ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
