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.