In an SPSS Modeler Stream, which node is used to read and import data from external sources?

The correct choice is indeed the Source Node, as it is specifically designed for reading and importing data from external sources into the SPSS Modeler Stream. Source Nodes can connect to various types of data sources, including databases, files, and other data formats, allowing users to seamlessly integrate external data into their analytical workflows.

This functionality is crucial because it sets the foundation for any analysis or modeling that follows. The Source Node allows users to specify the location and format of the external data, ensuring that it is accurately imported into the model. By utilizing this node, users can effectively manage their data ingestion process, which is essential for building robust predictive analytics models.

In contrast, the other nodes serve different purposes within the modeling process. For instance, the Field Operation Node is used for performing operations on specific fields or variables already present in the stream, while the Record Operation Node focuses on manipulating entire records. The Export Node, on the other hand, is utilized for saving or exporting data after it has been processed in the stream. Understanding the role of each node helps to effectively navigate the functionalities within SPSS Modeler.