I want to find the DOY (Day of Year) of some dates. I think to substract the date 1. January from the data to achive this. Something like:
> d <- as.Date("2006-03-13") - as.Date("2006-01-01") +1 > d Time difference of 72 days So far so good. But d is a 'difftime' object. How do I get an Integer value from that? I tried severel things, incuding the following: > dd <- as(d,"numeric") Error in .classEnv(thisClass) : unable to find an environment containing class "difftime" Sugestions appriciated... :-) [EMAIL PROTECTED] ______________________________________________ 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.