Expression

Expression

Expression

Description

Expression involves creating additional features in a dataset by combining existing features in different ways using various expressions and functions. 

Why to use

For Data Preparation

When to use

  • To create additional features
  • To extract some hidden features from the current feature
  • To compute insights from the features 

When not to use

—

Prerequisites

No prerequisites; it can be applied to any data source.

Input

Any dataset

Output

Additional features created using existing features.

Statistical Methods used

Refer to Operators in Expression Builder.

Limitations

  • It can create only additional features.
  • It cannot create additional data points.

With the Expression function, you can generate new features by modifying a feature or combining two or more existing features from the dataset using arithmetic, logic, text, date, and other such operators.

These various types of operators can be used as standalone operators or combined to create new features. The Expression function provides the facility to validate the expression before using it on the data. New features are created only if the combination of operators produces a valid result.

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