Marco Russo and Alberto Ferrari get visual:
Row context is the second fundamental concept in writing DAX code. In a previous article, we introduced the first concept – the filter context – using a visual approach. In this article, we rely on graphical visualization to describe a row context.
This article provides a different perspective on a topic already discussed in other row context articles: read them to get more insights about this important concept for DAX.
Click through for a great primer on the topic.