On Tue, 26-Jun-2012 at 10:54PM -0500, Erin Hodgess wrote:
|> Dear R People:
|>
|> I have dates as factors in the following:
|>
|> > poudel.df$DATE
|> [1] 1/2/2011 1/4/2011 1/4/2011 1/4/2011 1/6/2011 1/7/2011 1/8/2011
|> [8] 1/9/2011 1/10/2011
|> Levels: 1/10/2011 1/2/2011 1/4/2011 1/6/2011 1/7/2011 1/8/2011 1/9/2011
|> >
|>
|> I want them to be "regular" dates which can be sorted, etc.
|>
|> But when I did this:
|>
|> > as.character(poudel.df$DATE)
|> [1] "1/2/2011" "1/4/2011" "1/4/2011" "1/4/2011" "1/6/2011" "1/7/2011"
|> [7] "1/8/2011" "1/9/2011" "1/10/2011"
|>
|> and
|> > as.Date(as.character(poudel.df$DATE),"%m/%d/$Y")
|> [1] NA NA NA NA NA NA NA NA NA
|>
|> because the dates do not have leading zeros.
I don't think that's the reason why.
> as.Date(c("1/2/2011", "1/4/2011", "1/4/2011"), format = "%m/%d/%Y")
[1] "2011-01-02" "2011-01-04" "2011-01-04"
>
Leading zeros aren't essential.
|>
|> There are approximately 30 years of nearly daily data in the entire set.
|>
|> Any suggestions would be much appreciated.
|>
|> Sincerely,
|> Erin
|>
|>
|> --
|> Erin Hodgess
|> Associate Professor
|> Department of Computer and Mathematical Sciences
|> University of Houston - Downtown
|> mailto: erinm.hodg...@gmail.com
|>
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|> and provide commented, minimal, self-contained, reproducible code.
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