> On Mar 26, 2015, at 4:11 PM, Simon Kiss <sjk...@gmail.com> wrote:
>
> Hi there: normally I’m quite comfortable with as.Date(). But this data set is
> causing problems.
>
> The core of the data frame looks like the sample data frame below, but my
> attempt to convert df$mydate to a date object returns only NA. Can anyone
> provide a suggestion?
>
> Thank you, Simon Kiss
>
> #sample data frame
> df<-data.frame(mydate=factor(c('Jan-15', 'Feb-13', 'Mar-11', 'Jul-12')),
> other=rnorm(4, 3))
> #Attempt to convert
> as.Date(as.character(df$mydate), format='%b-%y')
Hi,
R's default date class object requires a full date, with a month, day and year.
You might look at the 'zoo' package on CRAN, which has a yearmon() function.
Regards,
Marc Schwartz
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