generate column values with multiple conditions in R

Question

I have a dataframe z and I want to create the new column based on the values of two old columns of z. Following is the process:

&g         


        

Answer 1

Here is an easy solution with just one ifelse command:

Calculate the multiplier of t:

ifelse(z$x == 7, 3, z$x ^ (z$x %in% c(2, 4)))

The complete command:

transform(z, q = t * ifelse(x == 7, 3, x ^ (x %in% c(2, 4))))

    x  y  t  q
1   1 11 21 21
2   2 12 22 44
3   3 13 23 23
4   4 14 24 96
5   5 15 25 25
6   6 16 26 26
7   7 17 27 81
8   8 18 28 28
9   9 19 29 29
10 10 20 30 30