block by mbostock c3034eef9d73b5fdf274

Diamonds II

Full Screen

Updated Example →

index.html

<!DOCTYPE html>
<meta charset="utf-8">
<style>

canvas,
svg {
  position: absolute;
}

.grid .tick line {
  stroke: #fff;
}

.grid--x .domain {
  fill: #e7e7e7;
  stroke: none;
}

.grid--y .domain,
.axis .domain {
  display: none;
}

</style>
<svg width="960" height="960"></svg>
<canvas width="960" height="960"></canvas>
<script src="//d3js.org/d3.v4.0.0-alpha.49.min.js"></script>
<script>

var canvas = d3.select("canvas").node(),
    context = canvas.getContext("2d");

var margin = {top: 20, right: 20, bottom: 30, left: 40},
    width = canvas.width - margin.left - margin.right,
    height = canvas.height - margin.top - margin.bottom;

var svg = d3.select("svg").append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

var x = d3.scaleLog()
    .rangeRound([0, width - 2]);

var y = d3.scaleLog()
    .rangeRound([height - 2, 0]);

context.translate(margin.left, margin.top);
context.globalCompositeOperation = "multiply";
context.fillStyle = "rgba(60,180,240,0.6)";

d3.tsv("diamonds.tsv", type, function(error, diamonds) {
  if (error) throw error;

  x.domain(d3.extent(diamonds, function(d) { return d.carat; }));
  y.domain(d3.extent(diamonds, function(d) { return d.price; }));

  svg.append("g")
      .attr("class", "grid grid--x")
      .call(d3.axisLeft(y)
          .tickSize(-width)
          .tickFormat(""));

  svg.append("g")
      .attr("class", "grid grid--y")
      .attr("transform", "translate(0," + height + ")")
      .call(d3.axisBottom(x)
          .tickSize(-height)
          .tickFormat(""));

  svg.append("g")
      .attr("class", "axis axis--y")
      .call(d3.axisLeft(y)
          .ticks(20, ".1s"))
    .append("text")
      .attr("x", 10)
      .attr("y", 10)
      .attr("dy", ".71em")
      .attr("fill", "#000")
      .attr("font-weight", "bold")
      .attr("text-anchor", "start")
      .text("Price (US$)");

  svg.append("g")
      .attr("class", "axis axis--x")
      .attr("transform", "translate(0," + height + ")")
      .call(d3.axisBottom(x)
          .ticks(20, ".1f"))
    .append("text")
      .attr("x", width - 10)
      .attr("y", -10)
      .attr("dy", "-.35em")
      .attr("fill", "#000")
      .attr("font-weight", "bold")
      .attr("text-anchor", "end")
      .text("Mass (carats)");

  d3.shuffle(diamonds);
  var t = d3.timer(function() {
    for (var i = 0, n = 500, d; i < n; ++i) {
      if (!(d = diamonds.pop())) return t.stop();
      context.fillRect(x(d.carat), y(d.price), Math.max(2, x(d.carat + 0.01) - x(d.carat)), 2);
    }
  });
});

function type(d) {
  d.carat = +d.carat;
  d.price = +d.price;
  return d;
}

</script>