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

The package dplyr and the function dplyr::relocate, a new verb introduced in dplyr 1.0.0, does exactly what you are looking for.

df %>% dplyr::relocate(b, c, .after = f)

Answer 2

Use the subset function:

> df <- data.frame(a,b,c,d,e,f)
> df <- subset(df, select = c(a, d:f, b:c))
> 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