(Builds on: Vector functions)
Until now, you’ve been using vector functions inside mutate() to create new
columns. In Vector functions, you learned how to convert some scalar functions
into vector functions. Sometimes, however, you’ll want to use a scalar function
to create a new column, and you won’t be able to convert that scalar function
into a vector function.
In this reading, you’ll learn how to use row-wise operations to call a scalar function multiple times with varying arguments. These operations can also be used for row-wise aggregates and working with list-columns.