Examples for Apex Steps and some utilities to help get you started building your own Apex Steps for Einstein Analytics Dashboards.
Official docs and some more info on building Einstein Analytics apps.
Some classes to help with boilerplate in parsing requests from an Apex Step and serializing results back to the Apex Step for visualization or more processing.
Using Apex steps to integrate with external data sources enabled via Remote Site Settings. Several examples connecting to public APIs for stock quotes and currency conversion rates, sites used are not affiliated and were chosen purely for demo purposes.
Examples of generic data manipluation steps from transposing tables to blending tables from different sources.