Learning Vega 2.0 a.k.a. Reactive Vega

h1 ~ aside { font-size: small; right: 0; position: absolute; width: 180px; } A Grammar of Graphics Vega 2.0 adds a grammar of interaction to the grammar of graphics implemented in Vega 1.

How to add a new chart type to dc.js

This is a step by step description of how I extended dc.js with a new chart type. It is inspired by a wiki page by Thomas Robert. A Bullet chart Mike Bostock already implemented a bullet chart in D3.

Understanding Great Circle Arcs Intersection Algorithm

The following material is the result of my attempt to understand the nice example from Jason Davies. I was puzzled about the origin of the algorithm used to find the intersection of two great circle arcs.