mutate rowSums exclude one column

Question

I have a data frame like this

> df
Source: local data frame [4 x 4]

      a x y z
1 name1 1 1 1
2 name2 1 1 1
3 name3 1 1 1
4 name4 1 1 1

W

Answer 1

You can use rich selectors with select() inside the call to rowSums()

df %>% transmute(a, total = rowSums(select(., -a)))