Update CHANGELOG

Author: mbostock

CHANGELOG.md

@@ -27,7 +27,23 @@ Plot.plot({
 })
 ```
 
-The new [dodge transform](./README.md#dodge) can be used to produce beeswarm plots. Given an *x* channel representing the desired horizontal position of circles, the dodgeY transform derives a new *y* (vertical position) channel such that the circles do not overlap; the dodgeX transform similarly derives a new *x* channel given a *y* channel. If an *r* channel is specified, the circles may have varying radius.
+The new [dodge transform](./README.md#dodge) can be used to produce beeswarm plots. Given an *x* channel representing the desired horizontal position of circles, the dodgeY transform derives a new *y* (vertical position) channel such that the circles do not overlap; the dodgeX transform similarly derives a new *x* channel given a *y* channel.
+
+[<img src="./img/dodge-random.png" width="640" alt="a beeswarm chart showing a random normal distribution; each of 800 samples is represented by a dot positioned along the x-axis, stacked on top of the y-axis like grains of sand">](https://observablehq.com/@observablehq/plot-dodge)
+
+```js
+Plot.plot({
+  height: 320,
+  x: {
+    domain: [-3, 3]
+  },
+  marks: [
+    Plot.dotX(Array.from({length: 800}, d3.randomNormal()), Plot.dodgeY())
+  ]
+})
+```
+
+If an *r* channel is specified, the circles may have varying radius.
 
 [<img src="./img/dodge.png" width="640" alt="a chart showing the monthly percent change in travel by U.S. county in March 2020 after the coronavirus outbreak; each county is represented as a circle with area proportional to its population, positioned according to the change in travel; most counties, and especially those with stay-at-home orders, show a significant reduction in travel">](https://observablehq.com/@observablehq/plot-dodge)