How to add a column that contains specific values when criteria is met?

Question

I have a dataframe:

tibble{
x = c(1,2,3)
y = c(0,2,4)
}

I want to add a NEW variable "z" that will be:

z = c("Lower         


        

Answer 1

A base R option

within(df,z <- c("Lower", "Equal", "Higher")[sign(y-x)+2])

which gives

# A tibble: 3 x 3
      x     y z     
    
1     1     0 Lower
2     2     2 Equal
3     3     4 Higher