Hi, Try: ?library(chron) julian()
x<-c(1:5) #month d<-c(10:14) #day y<-1970 #year julian(x,d,y,origin=c(month=2,day=1,year=1970)) [1] -22 10 39 71 102 A.K. ----- Original Message ----- From: Paloma Moya <polilla...@yahoo.es> To: "r-help@r-project.org" <r-help@r-project.org> Cc: Sent: Friday, June 15, 2012 2:13 AM Subject: [R] How to convert month-day-year to Julian data number? Hello, I am trying to convert calendar dates (Month, Day, Year) into Julian Days Product code Bureau of Meteorology station number Month Day Year Date_mdy Date 4102001 70014 1 1 1939 1/01/1939 1/01/1939 4102001 70014 1 2 1939 1/02/1939 2/01/1939 4102001 70014 1 3 1939 1/03/1939 3/01/1939 4102001 70014 1 4 1939 1/04/1939 4/01/1939 4102001 70014 1 5 1939 1/05/1939 5/01/1939 4102001 70014 1 6 1939 1/06/1939 6/01/1939 4102001 70014 1 7 1939 1/07/1939 7/01/1939 These are the type of data that I have I am trying to get the output as Product code Bureau of Meteorology station number Month Day Year Date_mdy Date JD 4102001 70014 1 1 1939 ######## ######## 215421 4102001 70014 1 2 1939 ######## ######## 215422 4102001 70014 1 3 1939 ######## ######## 215423 4102001 70014 1 4 1939 ######## ######## 215424 4102001 70014 1 5 1939 ######## ######## 215425 4102001 70014 1 6 1939 ######## ######## 215426 4102001 70014 1 7 1939 ######## ######## 215427 (these JDs are fictions) I have tried to apply strftime, mdy.date etc … etc… But I couldn’t… could you help me, please? Thank you very much, Paloma [[alternative HTML version deleted]] ______________________________________________ R-help@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. ______________________________________________ R-help@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.
