D3 Examples - Beeswarm

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<!DOCTYPE html>
<meta charset="utf-8">
<style>
​
.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}
​
.axis text {
  font: 10px sans-serif;
}
​
.cells path {
  fill: none;
  pointer-events: all;
}
​
.cells :hover circle {
  fill: red;
}
​
</style>
<svg width="960" height="200"></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>
​
var svg = d3.select("svg"),
    width = svg.attr("width"),
    height = svg.attr("height");
​
var x = d3.scaleLinear().rangeRound([0, width]);
​
var g = svg.append("g")
    .attr("transform", "translate(" + 10 + "," + 0 + ")");
​
d3.csv("flare.csv", type, function(error, data) {
  if (error) throw error;
    
  x.domain(d3.extent(data, function(d) { return d.value; }));
​
  var simulation = d3.forceSimulation(data)
      .force("x", d3.forceX(function(d) { return x(d.value); }).strength(1))
      .force("y", d3.forceY(height / 2))
      .force("collide", d3.forceCollide(4))
      .stop();
​
  for (var i = 0; i < 100; ++i) simulation.tick();  
​
  var cell = g.append("g")
      .attr("class", "cells")
    .selectAll("g").data(d3.voronoi()
        .extent([[0, 0], [width, height]])
        .x(function(d) { return d.x; })
        .y(function(d) { return d.y; })
      .polygons(data)).enter().append("g");
​
  cell.append("circle")
      .attr("r", 3)
      .attr("cx", function(d) { return d.data.x; })
      .attr("cy", function(d) { return d.data.y; });
​
});
​
function type(d) {
  if (!d.value) return;
  d.value = +d.value;
  return d;
}
​
</script>
​
    