3 messages · Jillywadd, Henrique Dallazuanna, Brian Ripley
Hello! I currently have a table of data with a column of start dates and a column with some numbers representing years. I need to add these numbers to the dates to get an end date. The two types of data are obviously incompatible and adddition of the two will not work. Does anyone know how I might go about this?? %-|
View this message in context: http://www.nabble.com/Addition-of-numeric-data-to-dates-tp16054166p16054166.html Sent from the R help mailing list archive at Nabble.com.
If I understand:
as.Date("2008-03-14") + 5*365
Hello! I currently have a table of data with a column of start dates and a column with some numbers representing years. I need to add these numbers to the dates to get an end date. The two types of data are obviously incompatible and adddition of the two will not work. Does anyone know how I might go about this?? %-| -- View this message in context: http://www.nabble.com/Addition-of-numeric-data-to-dates-tp16054166p16054166.html Sent from the R help mailing list archive at Nabble.com.
______________________________________________ R-help at r-project.org mailing list 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.
Henrique Dallazuanna Curitiba-Paran?-Brasil 25? 25' 40" S 49? 16' 22" O
If I understand:
as.Date("2008-03-14") + 5*365
What about leap years? That is 2013-03-13.
x <- as.Date("2008-03-14")
xx <- as.POSIXlt(x)
xx$year <- xx$year+5
as.Date(xx)
[1] "2013-03-14" is I think what is being asked for.
On 14/03/2008, Jillywadd <jill.waddingham07 at imperial.ac.uk> wrote:
I currently have a table of data with a column of start dates and a column with some numbers representing years. I need to add these numbers to the dates to get an end date. The two types of data are obviously incompatible and adddition of the two will not work. Does anyone know how I might go about this?? %-|
Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595