|  | ## Merge

#### Synopsis

Merges two nominal values of a specified attribute.

#### Description

Merges two nominal values of a given regular attribute. To process special attributes like labels, wrap this operator by an AttributeSubsetPreprocessing operator with the parameter process_special_attributes enabled.

#### Input

- example set input: expects: ExampleSetMetaData: #examples: = 0; #attributes: 0

, expects: ExampleSet

#### Output

- example set output:
- original:

#### Parameters

- attribute name: The name of the nominal attribute which values should be merged.
- first value: The first value which should be merged.
- second value: The second value which should be merged.

#### ExampleProcess