A Horizontal Tree Diagram Explained

As we discussed at the start of the previous section, we wanted to start describing tree diagrams with a vertical version because there was an added degree of complexity with the horizontal version that might cause some confusion. If you have worked through and understood the vertical version, the horizontal won’t present any problems other than when you go, “Oh, I see what’s going on.” If you find yourself part way through this description of the changes to the code and can’t see what’s going on, revisit the vertical code, and come back.

Horizontal tree diagram

The graphic that we are going to generate will look like this: