Li Zhang wrote: > Does anyone know why the two rank functions gives > different results? I need to use the rank function in > a "for" loop, so the sequence to be ranked is given > values in the form of part (1). How can I use > assignment like in part (1) to get correct ranks as in > part (2)? > > Thank You > > > > Part (1) > i<-1.94 > b<-0.95-i > c<-1.73-i > d<-2.62-i > > y<-c(0.68,0.95,b,c,d) > > y > 0.68 0.95 -0.99 -0.21 0.68 > > rank(y) > 3 5 1 2 4 > > Part(2) > rank(c(0.68,0.95,-0.99,-0.21,0.68)) > 3.5 5.0 1.0 2.0 3.5 > You have specified the exact numbers in part(2). Try part(1) with the following:
rank(zapsmall(y)) zapsmall removes tiny floating point errors that are not visible with the default representation of numbers. Jim ______________________________________________ [email protected] 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.
