Bar Chart

This example is a slight modification from Mike Bostock's bar chart example. d3Kit was used to construct the <svg> and setup all the margins.

This simple bar chart is constructed from a TSV file storing the frequency of letters in the English language. The chart employs conventional margins and a number of D3 features:

d3.tsv - load and parse data
d3.format - format percentages
d3.scale.ordinal - x-position encoding
d3.scale.linear - y-position encoding
d3.max - compute domains
d3.svg.axis - display axes

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

.bar {
  fill: steelblue;
}

.bar:hover {
  fill: brown;
}

.axis {
  font: 10px sans-serif;
}

.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

.x.axis path {
  display: none;
}

</style>
<body>
<script src="https://d3js.org/d3.v4.min.js" type="text/javascript"></script>
<script src="https://cdn.jsdelivr.net/gh/twitter/d3kit/v2.0.0/dist/d3kit.js" type="text/javascript"></script>
<script>

var skeleton = new d3Kit.Skeleton('body', {
  margin: {top: 20, right: 20, bottom: 30, left: 40},
  initialWidth: 960,
  initialHeight: 500
});

var x = d3.scaleBand()
  .paddingInner(0.1)
  .rangeRound([0, skeleton.getInnerWidth()]);

var y = d3.scaleLinear()
  .range([skeleton.getInnerHeight(), 0]);

var xAxis = d3.axisBottom()
  .scale(x);

var yAxis = d3.axisLeft()
  .scale(y)
  .ticks(10, "%");

d3.tsv("data.tsv", type, function(error, data) {
  x.domain(data.map(function(d) { return d.letter; }));
  y.domain([0, d3.max(data, function(d) { return d.frequency; })]);

skeleton.getRootG().append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + skeleton.getInnerHeight() + ")")
      .call(xAxis);

skeleton.getRootG().append("g")
      .attr("class", "y axis")
      .call(yAxis)
    .append("text")
      .attr("transform", "rotate(-90)")
      .attr("y", 6)
      .attr("dy", ".71em")
      .style("text-anchor", "end")
      .text("Frequency");

skeleton.getRootG().selectAll(".bar")
      .data(data)
    .enter().append("rect")
      .attr("class", "bar")
      .attr("x", function(d) { return x(d.letter); })
      .attr("width", x.bandwidth())
      .attr("y", function(d) { return y(d.frequency); })
      .attr("height", function(d) { return skeleton.getInnerHeight() - y(d.frequency); });

});

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

</script>

Updated missing url https://rawgit.com/twitter/d3kit/v2.0.0/dist/d3kit.js to https://cdn.jsdelivr.net/gh/twitter/d3kit/v2.0.0/dist/d3kit.js

https://d3js.org/d3.v4.min.js

https://rawgit.com/twitter/d3kit/v2.0.0/dist/d3kit.js