Note the column name, mpg, is unquoted. That feature hasn’t been handy, though, if you want to write your own R functions using the tidyverse. That’s because base R functions usually need ...

The name of the user-defined function must not be the same as any cell address in the worksheet. For instance, using the name CDE567 is not allowed. You cant use space in your Excel functions.

Writing a function in Python To create a function, first give the function a name, and name the value that the function should use in its calculations.