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How to convert alphabets to numbers in R data frame?
To convert alphabets to numbers in R data frame, we can follow the below steps −
First of all, create a data frame.
Then, use mutate_each function of dplyr package along with chartr function to convert alphabets to numbers.
Example
Create the data frame
Let’s create a data frame as shown below −
x<-sample(LETTERS[1:4],25,replace=TRUE) y<-sample(LETTERS[1:4],25,replace=TRUE) z<-sample(LETTERS[1:4],25,replace=TRUE) df<-data.frame(x,y,z) df
Output
On executing, the above script generates the below output(this output will vary on your system due to randomization) −
x y z 1 C B D 2 D D C 3 B B D 4 D A D 5 B D C 6 C B C 7 C D C 8 B B A 9 D C D 10 D A A 11 B C B 12 C B B 13 C D B 14 C A B 15 C C C 16 A C B 17 A C B 18 B C C 19 A A B 20 B C C 21 B D A 22 B B C 23 A D B 24 A D B 25 A A C
Convert alphabets to numbers
Using mutate_each function of dplyr package along with chartr function to convert alphabets in data frame df to numbers as shown below −
x<-sample(LETTERS[1:4],25,replace=TRUE) y<-sample(LETTERS[1:4],25,replace=TRUE) z<-sample(LETTERS[1:4],25,replace=TRUE) df<-data.frame(x,y,z) library(dplyr) df %>% mutate_each(funs(chartr("ABCD","1234",.)))
Output
x y z 1 3 2 4 2 4 4 3 3 2 2 4 4 4 1 4 5 2 4 3 6 3 2 3 7 3 4 3 8 2 2 1 9 4 3 4 10 4 1 1 11 2 3 2 12 3 2 2 13 3 4 2 14 3 1 2 15 3 3 3 16 1 3 2 17 1 3 2 18 2 3 3 19 1 1 2 20 2 3 3 21 2 4 1 22 2 2 3 23 1 4 2 24 1 4 2 25 1 1 3
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