[R] convert S-Plus function to R function

From: Roslina Zakaria <zroslina_at_yahoo.com>
Date: Tue, 06 May 2008 19:00:16 -0700 (PDT)


Hi R-expert,
If I have this daily rainfall data, how do call a particular set of data?

Year,Month,Day,Amount
1981,1,1,0
1981,1,2,0
1981,1,3,78
1981,1,4,22
1981,1,5,2
1981,1,6,0
1981,1,7,0
1981,1,8,0
1981,1,9,0
1981,1,10,10
1981,1,11,0
1981,1,12,108
1981,1,13,328
1981,1,14,10
1981,1,15,0
1981,1,16,6
1981,1,17,0
1981,1,18,28
1981,1,19,0
1981,1,20,0
1981,1,21,0
1981,1,22,0
1981,1,23,0
1981,1,24,0
1981,1,25,32
1981,1,26,0
1981,1,27,2
1981,1,28,0
1981,1,29,2
1981,1,30,0
1981,1,31,0
1981,2,1,0
1981,2,2,118
1981,2,3,0
1981,2,4,0
1981,2,5,0
1981,2,6,12
1981,2,7,0
1981,2,8,0
1981,2,9,46
1981,2,10,4
1981,2,11,0
1981,2,12,0
1981,2,13,0
1981,2,14,0
1981,2,15,0
1981,2,16,0
1981,2,17,0
1981,2,18,0
1981,2,19,0
1981,2,20,0
1981,2,21,4
1981,2,22,16
1981,2,23,0
1981,2,24,0
1981,2,25,2
1981,2,26,0
1981,2,27,0
1981,2,28,0
1981,3,1,0
1981,3,2,0
1981,3,3,0
1981,3,4,0
1981,3,5,0
1981,3,6,0
1981,3,7,0
1981,3,8,0
1981,3,9,106
1981,3,10,10
1981,3,11,0
1981,3,12,0
1981,3,13,0
1981,3,14,0
1981,3,15,32

...
For example, if I would like to extract january and february data, and use 1/1/1901 as the origin. How do I use the dates function in R ? I did try to lookup in the manual, but not sure how to apply it? This is my code in S-plus.
define.date1<-function(dt1,mt1,mt2,nn,da)
{  mt2<-mt2+1

   start<-julian(mt1, 1, nn, origin=c(month=1, day=1, year=1971))+1
   end<-julian(mt2, 1, nn, origin=c(month=1, day=1, year=1971))+da
   a<-dt1[start:end,]
   am<-as.matrix(a[,5])
}
Thank you so much for your kind attention and help.

Be a better friend, newshound, and
know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ

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. Received on Wed 07 May 2008 - 02:05:00 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Wed 07 May 2008 - 03:30:35 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.

list of date sections of archive