curran/README.md

## README.md

      
    Raw
  

              README.md
            
          
    Adding color to a bar chart using d3.scale.category10.
This is example 10 from the screencast Splitting Charts.
MIT License


## index.html
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>D3 Example</title>
    <script src="//cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
    <link href='https://fonts.googleapis.com/css?family=Open+Sans' rel='stylesheet' type='text/css'>
    <style>

      .axis text {
        font-family: 'Open Sans', sans-serif;
        font-size: 20pt;
      }
      .axis .label {
        font-size: 20pt;
      }

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

      .x.axis text {
        font-size: 20pt;
      }

    </style>
  </head>
  <body>
    <script>
      var outerWidth = 960;
      var outerHeight = 500;
      var margin = { left: 90, top: 16, right: 30, bottom: 85 };
      var barPadding = 0.2;

      var xColumn = "religion";
      var yColumn = "population";
      var colorColumn = "religion";

      var innerWidth  = outerWidth  - margin.left - margin.right;
      var innerHeight = outerHeight - margin.top  - margin.bottom;

      var svg = d3.select("body").append("svg")
        .attr("width",  outerWidth)
        .attr("height", outerHeight);
      var g = svg.append("g")
        .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
      var xAxisG = g.append("g")
        .attr("class", "x axis")
        .attr("transform", "translate(0," + innerHeight + ")");
      var yAxisG = g.append("g")
        .attr("class", "y axis");

      var xScale = d3.scale.ordinal().rangeBands([0, innerWidth], barPadding);
      var yScale = d3.scale.linear().range([innerHeight, 0]);
      var colorScale = d3.scale.category10();

      // Use a modified SI formatter that uses "B" for Billion.
      var siFormat = d3.format("s");
      var customTickFormat = function (d){
        return siFormat(d).replace("G", "B");
      };

      var xAxis = d3.svg.axis().scale(xScale).orient("bottom")
        .outerTickSize(0);
      var yAxis = d3.svg.axis().scale(yScale).orient("left")
        .ticks(5)
        .tickFormat(customTickFormat)
        .outerTickSize(0);

      function render(data){

        xScale.domain(       data.map( function (d){ return d[xColumn]; }));
        yScale.domain([0, d3.max(data, function (d){ return d[yColumn]; })]);
        colorScale.domain(data.map(function (d){ return d[colorColumn]; }));

        xAxisG
          .call(xAxis)
          .selectAll("text")
          .attr("dx", "-0.4em")
          .attr("dy", "1.24em")
          .attr("transform", "rotate(-16)" );

        yAxisG.call(yAxis);

        var bars = g.selectAll("rect").data(data);
        bars.enter().append("rect")
          .attr("width", xScale.rangeBand());
        bars
          .attr("x", function (d){ return xScale(d[xColumn]); })
          .attr("y", function (d){ return yScale(d[yColumn]); })
          .attr("height", function (d){ return innerHeight - yScale(d[yColumn]); })
          .attr("fill", function (d){ return colorScale(d[colorColumn]); });
        bars.exit().remove();
      }

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

      d3.csv("religionWorldTotals.csv", type, render);

    </script>
  </body>
</html>

## religionWorldTotals.csv

          
            religion
            population

            
              Christian
              2173100000

            
              Muslim
              1598360000

            
              Unaffiliated
              1126280000

            
              Hindu
              1032860000

            
              Buddhist
              487320000

            
              Folk Religions
              404890000

            
              Other Religions
              57770000

            
              Jewish
              13640000

## thumbnail.png

      
    Raw
  

              thumbnail.png
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<title>D3 Example</title>
	<script src="//cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
	<link href='https://fonts.googleapis.com/css?family=Open+Sans' rel='stylesheet' type='text/css'>
	<style>

	.axis text {
	font-family: 'Open Sans', sans-serif;
	font-size: 20pt;
	}
	.axis .label {
	font-size: 20pt;
	}

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

	.x.axis text {
	font-size: 20pt;
	}

	</style>
	</head>
	<body>
	<script>
	var outerWidth = 960;
	var outerHeight = 500;
	var margin = { left: 90, top: 16, right: 30, bottom: 85 };
	var barPadding = 0.2;

	var xColumn = "religion";
	var yColumn = "population";
	var colorColumn = "religion";

	var innerWidth = outerWidth - margin.left - margin.right;
	var innerHeight = outerHeight - margin.top - margin.bottom;

	var svg = d3.select("body").append("svg")
	.attr("width", outerWidth)
	.attr("height", outerHeight);
	var g = svg.append("g")
	.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
	var xAxisG = g.append("g")
	.attr("class", "x axis")
	.attr("transform", "translate(0," + innerHeight + ")");
	var yAxisG = g.append("g")
	.attr("class", "y axis");

	var xScale = d3.scale.ordinal().rangeBands([0, innerWidth], barPadding);
	var yScale = d3.scale.linear().range([innerHeight, 0]);
	var colorScale = d3.scale.category10();

	// Use a modified SI formatter that uses "B" for Billion.
	var siFormat = d3.format("s");
	var customTickFormat = function (d){
	return siFormat(d).replace("G", "B");
	};

	var xAxis = d3.svg.axis().scale(xScale).orient("bottom")
	.outerTickSize(0);
	var yAxis = d3.svg.axis().scale(yScale).orient("left")
	.ticks(5)
	.tickFormat(customTickFormat)
	.outerTickSize(0);

	function render(data){

	xScale.domain( data.map( function (d){ return d[xColumn]; }));
	yScale.domain([0, d3.max(data, function (d){ return d[yColumn]; })]);
	colorScale.domain(data.map(function (d){ return d[colorColumn]; }));

	xAxisG
	.call(xAxis)
	.selectAll("text")
	.attr("dx", "-0.4em")
	.attr("dy", "1.24em")
	.attr("transform", "rotate(-16)" );

	yAxisG.call(yAxis);

	var bars = g.selectAll("rect").data(data);
	bars.enter().append("rect")
	.attr("width", xScale.rangeBand());
	bars
	.attr("x", function (d){ return xScale(d[xColumn]); })
	.attr("y", function (d){ return yScale(d[yColumn]); })
	.attr("height", function (d){ return innerHeight - yScale(d[yColumn]); })
	.attr("fill", function (d){ return colorScale(d[colorColumn]); });
	bars.exit().remove();
	}

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

	d3.csv("religionWorldTotals.csv", type, render);

	</script>
	</body>
	</html>
	religion	population
	Christian	2173100000
	Muslim	1598360000
	Unaffiliated	1126280000
	Hindu	1032860000
	Buddhist	487320000
	Folk Religions	404890000
	Other Religions	57770000
	Jewish	13640000