feature types
There are two types of features in structured data. They are numerical features and categorical features. Numerical features are represented by either Integers (discrete numbers) or real (floating point) values. Categorical features are represented by string values. They may either be Ordinal or Nominal. Ordinal categorical features are string values with a specific order, while there is no such order in nominal features. Generally, ordinal features are replaced with integers while one-hot encoding is used for nominal features.