[R] Date formats in as.Date

I have trouble with this: as.Date(Sep-1981, format=%b-%Y) Returns NA From documentation for strftime '%b' Abbreviated month name in the current locale. (Also matches full name on input.) '%Y' Year with century. What am I doing wrong? cheers Worik [[alternative HTML

Re: [R] Date formats in as.Date

Worik, You need a day! as in: as.Date(1-Sep-1981, format=%d-%b-%Y) ## first of the month HTH, Jim Porzak Ancestry.com San Francisco, CA www.linkedin.com/in/jimporzak use R! Group SF: www.meetup.com/R-Users/ On Thu, Sep 24, 2009 at 4:15 PM, Worik R wor...@gmail.com wrote: I have trouble

Re: [R] Date formats in as.Date

Try this: library(zoo) as.yearmon(Sep-1981, %b-%Y) [1] Sep 1981 as.Date(as.yearmon(Sep-1981, %b-%Y)) [1] 1981-09-01 as.Date(paste(1, Sep-1981), %d %b-%Y) [1] 1981-09-01 On Thu, Sep 24, 2009 at 7:15 PM, Worik R wor...@gmail.com wrote: I have trouble with this: as.Date(Sep-1981,