Simple Bar Chart

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

Based on the example by Mike Bostock.

<!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 { 
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}
 
</style>
<body>
<script src="https://d3js.org/d3.v3.min.js"></script>
<script>
 
var margin = {top: 20, right: 20, bottom: 50, left: 40},
    //width = 960 - margin.left - margin.right,
	width = 450 - margin.left - margin.right,
    height = 400 - margin.top - margin.bottom;
 
var x = d3.scale.ordinal()
    .rangeRoundBands([0, width], .1);
 
var y = d3.scale.linear()
    .range([height, 0 + margin.top ]);
 
var xAxis = d3.svg.axis()
    .scale(x)
    .orient("bottom");
 
var yAxis = d3.svg.axis()
    .scale(y)
    .orient("left")
    .ticks(10); //  .ticks(10, "%");
 
var svg = d3.select("body").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
 
d3.tsv("data.tsv", type, function(error, data) {
  x.domain(data.map(function(d) { return d.quarter; }));
  y.domain([0, d3.max(data, function(d) { return d.revenue; })]);
 
  svg.append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + height + ")")
      .call(xAxis)
	.append("text")             // text label for the x axis
        .attr("x", (width / 2) )
        .attr("y",  20 )
		.attr("dy", ".71em")
        .style("text-anchor", "middle")
		.style("font-size", "16px") 
        .text("Quarter");
		
 // add y-axis
  svg.append("g")
      .attr("class", "y axis")
      .call(yAxis)
    .append("text") // and text1
      .attr("transform", "rotate(-90)")
      .attr("y", 6)
      .attr("dy", ".71em")
      .style("text-anchor", "end")
	  .style("font-size", "16px") 
      .text("Revenue");
 
  svg.selectAll(".bar")
      .data(data)
    .enter().append("rect")
      .attr("class", "bar")
      .attr("x", function(d) { return x(d.quarter); })
      .attr("width", x.rangeBand())
      .attr("y", function(d) { return y(d.revenue); })
      .attr("height", function(d) { return height - y(d.revenue); });
	  
	  
// add a title
	svg.append("text")
        .attr("x", (width / 2))             
        .attr("y", 0 + (margin.top / 2))
        .attr("text-anchor", "middle")  
        .style("font-size", "24px") 
        //.style("text-decoration", "underline")  
        .text("Average Revenue 2012 in Euro");
 
});
 
function type(d) {
  d.revenue = +d.revenue;
  return d;
}
 
</script>

Modified http://d3js.org/d3.v3.min.js to a secure url

https://d3js.org/d3.v3.min.js