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numvec<-c(1:9,7:15,11,12)
numvec## [1] 1 2 3 4 5 6 7 8 9 7 8 9 10 11 12 13 14 15 11 12numvec.character<-as.character(numvec)
numvec.character## [1] "1" "2" "3" "4" "5" "6" "7" "8" "9" "7" "8" "9" "10" "11"
## [15] "12" "13" "14" "15" "11" "12"numvec.factor<-factor(numvec)
numvec.factor## [1] 1 2 3 4 5 6 7 8 9 7 8 9 10 11 12 13 14 15 11 12
## Levels: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15nlevels(numvec.factor)## [1] 15