Hi everyone,
I am trying to calculate the number of days between any two dates in a year
regardless of the year. Specifically, image two dates:
MonDay1 <- "01-30" #January 30
MonDay2 <- "12-31" #December 31
I want the difference of those two dates to be
MonDay1- MonDay2=30 days #January is closer to December from the prior year
than to the December in the year when January is.
FYI. this calculation is to count the number of days between any given date to
the peak of the summer, which in the southern hemisphere can be around December.
Unfortunately, I have not been able to make R recognize a date as just Mon-Day.
If I try:
MonDay1<-as.Date("01-30",format="%m-%d") # this automatically assigns the
current year
[1] "2015-01-30"
This following code allows to define just Mon-Day but it is recognized as
character:
format(strptime("07-30", format="%j"), format="%m-%d")
Any help will be greatly appreciated,
Thanks,
Camilo
______________________________________________
[email protected] mailing list -- To UNSUBSCRIBE and more, see
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.
