The `eval` command in Splunk is used for what purpose?

The eval command in Splunk is specifically designed to calculate and create new fields based on the existing data in your events. This command allows you to perform various types of calculations, manipulate string values, transform date formats, and create new fields derived from the data you already have in your search results. For instance, you can use eval to compute mathematical operations, concatenate strings, and convert data types, which enhances your ability to analyze and visualize data effectively.

In the context of the other options, while executing external scripts, filtering data, and retrieving raw log data are important functionalities within Splunk, they are not the purpose of the eval command. Instead, they align with other Splunk commands or features that serve those specific tasks, such as script for executing external scripts or search commands for filtering data and retrieving logs.