SimpleD3BarChart

by Simon Raper

HTML

<svg class="chart"></svg>

CSS

.chart rect {
  fill: steelblue;
}

.chart text {
  fill: white;
  font: 10px sans-serif;
  text-anchor: end;
}

JavaScript

var data = [
  {name: "Locke",    value:  20},
  {name: "Reyes",    value:  8},
  {name: "Ford",     value: 15},
  {name: "Jarrah",   value: 16},
  {name: "Shephard", value: 23},
  {name: "Kwon",     value: 42}
];

var width = 420,
    barHeight = 20;

var x = d3.scale.linear()
    .range([0, width])
    .domain([0, d3.max(data, function(d) { return d.value; })]);

var chart = d3.select(".chart")
    .attr("width", width);


  chart.attr("height", barHeight * data.length);

  var bar = chart.selectAll("g")
      .data(data)
    .enter().append("g")
      .attr("transform", function(d, i) { return "translate(0," + i * barHeight + ")"; });

  bar.append("rect")
      .attr("width", function(d) { return x(d.value); })
      .attr("height", barHeight - 1);

  bar.append("text")
      .attr("x", function(d) { return x(d.value) - 3; })
      .attr("y", barHeight / 2)
      .attr("dy", ".35em")
      .text(function(d) { return d.value; });

function type(d) {
  d.value = +d.value; // coerce to number
  return d;
}