Transform a function into a valid stat function for the table
statify(x, f)The results for the function applied on the vector, compatible with the format of the result table
A vector
The function to try to apply, or a formula combining two functions
NA values are removed from the data
Applying the function on a numerical vector should return one value
Applying the function on a factor should return nlevels + 1 value, or one value per factor level
See parse_formula for the usage for formulaes.