[R] how to recode in my dataset?

From: zhijie zhang <epistat_at_gmail.com>
Date: Sun 02 Jul 2006 - 22:33:20 EST


Dear Rusers,
 My question is about "recode variables". First, i'd like to say something about the idea of recoding:
 My dataset have three variables:type,soiltem and airtem,which means grass type, soil temperature and air temperature. As we all known, the change of air temperature is greater than soil temperature,so the values in those two different temperaturemay represent different range.
 My recoding is to recode soiltem with 0.2 intervals, and airtem with 0.5 intervals, that is:
In soiltem:0~0.2<-0.1, 0.2~0.4<-0.3, 0.4`0.6<-0.5,...etc; In airtem:0~0.5<-0.25, 0.5~1<-0.75, 1`1.5<-1.25,...etc; My example like this:
type<-c(1, 1, 2, 3,4,1,1,4,3,2)
soiltem<-c(19.2,18.6,19.5,19.8,19.6,20.6,19.1,18.7,22.4,21.6) airtem<-c(19.9,20.5,21.6,25.6,22.6,21.3,23.7,21.5,24.7,24.4) mydata<-data.frame(type,soiltem,airtem) #copy the above four arguments to generate the dataset

mydata

   type soiltem airtem

1     1    19.2   19.9
2     1    18.6   20.5
3     2    19.5   21.6
4     3    19.8   25.6
5     4    19.6   22.6
6     1    20.6   21.3
7     1    19.1   23.7
8     4    18.7   21.5
9     3    22.4   24.7
10    2    21.6   24.4

Thanks very much!

-- 
Kind Regards,
Zhi Jie,Zhang ,PHD
Department of Epidemiology
School of Public Health
Fudan University
Tel:86-21-54237149

______________________________________________
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Received on Sun Jul 02 22:44:10 2006

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.1.8, at Mon 03 Jul 2006 - 16:14:36 EST.

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