GitLab

var barchart = g1.sanddance({
  layout: 'grid'
  width: 100,
  height: 100,
  // Group by category, which is a number from 0 - 3
  group: function(d) { return d.category },
  facets: [
    {x: 0, y:  0, width: 100, height: 20},
    {x: 0, y: 25, width: 100, height: 20},
    {x: 0, y: 50, width: 100, height: 20},
    {x: 0, y: 75, width: 100, height: 20},
  ],
  data: data
})

d3.selectAll('circle')
  .data(data)
  .call(barchart)

... should create something like this: