Not sure if this is the correct forum for this, but I've found what I would consider to be a potentially serious bug to the unsuspecting user. Given a numeric vector V with class labels in R, the following calls
1. > sort(as.matrix(V)) and 2. >as.matrix(sort(V)) produce different ouput. The vector is sorted properly in both cases, but only 2. produces the correct labeling of the vector. The call to 1. produces a vector with incorrect labels (not sorted). Code: >X<-c("A","B","C","D","E","F","G","H") >Y<-rev(1:8) >names(Y)<-X > Y A B C D E F G H 8 7 6 5 4 3 2 1 > sort(as.matrix(Y)) [,1] A 1 B 2 C 3 D 4 E 5 F 6 G 7 H 8 > as.matrix(sort(Y)) [,1] H 1 G 2 F 3 E 4 D 5 C 6 B 7 A 8 Cheers, ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel