Reordering columns in a large dataframe

Question

Using the following example dataframe:

a <-  c(1:5)
b <- c(\"Cat\", \"Dog\", \"Rabbit\", \"Cat\", \"Dog\")
c <- c(\"Dog\", \"Rabbit\", \"Cat\", \"Do         


        

Answer 1

You can refer to columns by position. e.g.

df <- df[ ,c(1,4:6,2:3)]
> df
  a      d      e      f      b      c
1 1 Rabbit    Cat    Cat    Cat    Dog
2 2    Cat    Dog    Dog    Dog Rabbit
3 3    Dog    Dog    Dog Rabbit    Cat
4 4    Dog Rabbit Rabbit    Cat    Dog
5 5 Rabbit    Cat    Cat    Dog    Dog