Re: [R] why it returns list level number instead of its content?
You have read in the data as factors. Try class(data$V4) to see this. When you are doing something like a cbind R treats the factors as numbers. You need to convert the factors back to character data. Try something like d1 - as.character(data$V4) d2 - as.character(data$V5) and then do a cbind to see what happens. This is not the proper way to do things, I'm sure, but it should help you see what is happening. --- Hu Chen [EMAIL PROTECTED] wrote: for example: I have a data frame. data$V4 returns: . [6936] P05796 P11096 P76174 P04475 P18775 [6941] P33225 P76387 P76388 P76388 P09375 [6946] P15300 P15723 1375 Levels: O50190 O65938 O69415 P00274 P00363 P00364 P00370 P00373 ... Q9AJ15 data$V5 returns something like data$V4 I want to cbind this two columns, so I use new - cbind(data$V4,data$V5) I expect it to return something like: [1] P05761 P11986 [2] ... however it returns [1] 215 434 [2] 134 213 . it uses level number instead of its content like P05761. What's wrong with it? how can I get its content instead of level number? I can use some dirty ways to do that but I didn't understand why. [[alternative HTML version deleted]] __ 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 and provide commented, minimal, self-contained, reproducible code. __ 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 and provide commented, minimal, self-contained, reproducible code.
[R] why it returns list level number instead of its content?
for example: I have a data frame. data$V4 returns: . [6936] P05796 P11096 P76174 P04475 P18775 [6941] P33225 P76387 P76388 P76388 P09375 [6946] P15300 P15723 1375 Levels: O50190 O65938 O69415 P00274 P00363 P00364 P00370 P00373 ... Q9AJ15 data$V5 returns something like data$V4 I want to cbind this two columns, so I use new - cbind(data$V4,data$V5) I expect it to return something like: [1] P05761 P11986 [2] ... however it returns [1] 215 434 [2] 134 213 . it uses level number instead of its content like P05761. What's wrong with it? how can I get its content instead of level number? I can use some dirty ways to do that but I didn't understand why. [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] why it returns list level number instead of its content?
The class factor is defined for vectors, not matrices. The attempt to use a factor in a matrix setting coerces it to numeric. See the documentation for factor where it says In particular, as.numeric applied to a factor is meaningless, and may happen by implicit coercion. tmp - matrix(1:8, 4) tmp [,1] [,2] [1,]15 [2,]26 [3,]37 [4,]48 factor(tmp) [1] 1 2 3 4 5 6 7 8 Levels: 1 2 3 4 5 6 7 8 ## A simplified example based on yours: tmp - data.frame(a=factor(letters[1:4]), b=factor(letters[5:8])) tmp a b 1 a e 2 b f 3 c g 4 d h cbind(tmp$a, tmp$b) ## coerced to numeric, both factors went to 1:4 [,1] [,2] [1,]11 [2,]22 [3,]33 [4,]44 tmp[, c(a,b)] ## in your example, subscripting is probably the right method a b 1 a e 2 b f 3 c g 4 d h cbind.data.frame(tmp$a, tmp$b) ## explicit use of cbind.data.frame works. tmp$a tmp$b 1 a e 2 b f 3 c g 4 d h Rich __ 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 and provide commented, minimal, self-contained, reproducible code.
