Maybe you should show your colleague how to access help pages in R? Right in ?knn, it says:
prob: If this is true, the proportion of the votes for the winning class are returned as attribute 'prob'. so 1.0 mean all three NNs are of the `winning'; i.e., predicted, class, and 0.66667 means 2 out of the 3 NNs are of the winning class, etc. Andy > From: Ko-Kang Kevin Wang > > Hi, > > [I'm posting this on behalf of a colleague -- as I don't know > knn myself...] > > How to interpret the knn() results? > > Tried the example codes in the documentation: > data(iris3) > train <- rbind(iris3[1:25,,1], iris3[1:25,,2], iris3[1:25,,3]) > test <- rbind(iris3[26:50,,1], iris3[26:50,,2], iris3[26:50,,3]) > cl <- factor(c(rep("s",25), rep("c",25), rep("v",25))) > knn(train, test, cl, k = 3, prob=TRUE) > attributes(.Last.value) > and got: > $levels > [1] "c" "s" "v" > > $class > [1] "factor" > > $prob > [1] 1.0000000 1.0000000 1.0000000 1.0000000 1.0000000 1.0000000 > [7] 1.0000000 1.0000000 1.0000000 1.0000000 1.0000000 1.0000000 > [13] 1.0000000 1.0000000 1.0000000 1.0000000 1.0000000 1.0000000 > [19] 1.0000000 1.0000000 1.0000000 1.0000000 1.0000000 1.0000000 > [25] 1.0000000 1.0000000 1.0000000 0.6666667 1.0000000 1.0000000 > [31] 1.0000000 1.0000000 1.0000000 0.6666667 1.0000000 1.0000000 > [37] 1.0000000 1.0000000 1.0000000 1.0000000 1.0000000 1.0000000 > [43] 1.0000000 1.0000000 1.0000000 1.0000000 1.0000000 1.0000000 > [49] 1.0000000 1.0000000 1.0000000 0.6666667 0.7500000 1.0000000 > [55] 1.0000000 1.0000000 1.0000000 1.0000000 0.5000000 1.0000000 > [61] 1.0000000 1.0000000 1.0000000 0.6666667 1.0000000 1.0000000 > [67] 1.0000000 1.0000000 1.0000000 1.0000000 1.0000000 0.6666667 > [73] 1.0000000 1.0000000 0.6666667 > > > What do the prob mean? > > Thanks, > > Kevin > > ______________________________________________ > [EMAIL PROTECTED] mailing list > https://www.stat.math.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html > > ------------------------------------------------------------------------------ Notice: This e-mail message, together with any attachments,...{{dropped}} ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html