[R] Month end calculations
jporzak at gmail.com
Thu Aug 30 05:44:20 CEST 2007
By using the tautology that the end of a month is immediately followed
by the first of a month, the following returns a TRUE when the date is
the last day of a month
IsMonthEnd <- format(MyDates + 1, "%d") == "01"
where MyDates is a vector, or column in a data frame, typed as Date
(eg with as.Date)
San Francisco, CA
On 8/29/07, Shubha Vishwanath Karanth <shubhak at ambaresearch.com> wrote:
> Hi R users,
> Is there a function in R, which does some calculation only for the month
> end in a daily data?... In other words, is there a command in R,
> equivalent to "last." function in SAS?
> BR, Shubha
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
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