I always use "recode" function (in the car packages) to recode variables.That works well and I like that function.
2006/7/2, zhijie zhang <[EMAIL PROTECTED]>:
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
-- 黄荣贵 Department of Sociology Fudan University
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