Feature Engineering Made Easy

Mathematical operations allowed

At each level, we will describe briefly the type of math that is allowed, and more importantly, not allowed. At this level, we cannot perform any quantitative mathematical operations, such as addition or division. These would not make any sense. Due to the lack of addition and division, we obviously cannot find an average value at the nominal level. There is no average name or average job department.

We can, however, do basic counts using pandas' value_counts methods:

# Basic Value Counts of the Grade columnsalary_ranges['Grade'].value_counts().head()00000    61
07450    12
06870     9
07170     9
07420     9
Name: Grade, dtype: int64

The most commonly occurring Grade is 00000, meaning that that is our mode or ...