[R] Help on Calculating day differences

[Gabor Grothendieck]

See ?is.holiday in chron.   You need to supply
a .Holidays vector and then do this:

library(chron)
d1 <- Sys.Date()
d2 <- Sys.Date() + 100
sq <- sq(d1, d2, by = "day")
sum(!is.holiday(sq) & !is.weekend(sq)) # endpoints included

The fCalendar package also has functionality in this area.

On Wed, May 28, 2008 at 9:30 AM, Thorsten Muehge <MUEHGE at de.ibm.com> wrote:
> Hello R Freaks,
> I calculate the difference in days between two events with the following
> litte R expresseion:
>
> T1a <- strptime(T1,"%m/%d/%y %H:%M:%S");
> T2a <- strptime(T2,"%m/%d/%y %H:%M:%S");
> T1b <- as.Date(T1a);
> T2b <- as.Date(T2a);
> days <- T2b-T1b;
> time <- T2a - T1a;
>
> In the project I would like to calculate only working day.
>
> I the a possibility to count on woring days without weekends?
>
> Is it maybe also possible to skip in addition the national holiday dates?
>
> Thanks a lit for your help
> Thorsten
>
> Mit freundlichen Grüßen / Best Regards / С наилучшими пожеланиями /
> üdvözlettel
>
> Dr .Th.Mühge,
>
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>
>
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