README.md

## README.md

      
        

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              README.md
            
          
        
      
    
  
    Example of stacked area charts --based off of this gist --  addressing this SO question.

  

  

## data.csv

        
        date
        Kermit
        piggy
        Gonzo
        fuzzy
        hogthrob
        animal
        floyd
        Gabriel
        Beaker
        scooter
        statler
        waldorf
        slim
        sam

        
        13-Oct-31
        113.44
        435.15
        19.57
        60.55
        53.02
        268.28
        87.34
        1.98
        0
        31.68
        0
        21.59
        4.82
        11.31

        
        13-Nov-30
        109.86
        506.85
        18.97
        58.77
        388.37
        131.48
        85.34
        1.98
        0
        48.50
        0
        21.59
        4.70
        11.31

        
        13-Dec-31
        113.46
        644.88
        19.57
        60.57
        669.47
        0
        87.46
        1.98
        0
        80.97
        0
        21.59
        4.82
        11.43

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

body {
  font: 10px sans-serif;
}

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

.browser text {
  text-anchor: end;
}

</style>
<body>
<script src="http://d3js.org/d3.v3.js"></script>
<script>

var margin = {top: 20, right: 20, bottom: 30, left: 50},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

var parseDate = d3.time.format("%y-%b-%d").parse;
    //formatPercent = d3.format(".0%");

var x = d3.time.scale()
    .range([0, width]);

var y = d3.scale.linear()
    .range([height, 0]);

var color = d3.scale.category20();

var xAxis = d3.svg.axis()
    .scale(x)
    .orient("bottom");

var yAxis = d3.svg.axis()
    .scale(y)
    .orient("left")
    //.tickFormat(formatPercent);

var area = d3.svg.area()
    .x(function(d) { return x(d.date); })
    .y0(function(d) { return y(d.y0); })
    .y1(function(d) { return y(d.y0 + d.y); });

var stack = d3.layout.stack()
    .values(function(d) { return d.values; });

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.csv("data.csv", function(error, data) {
  color.domain(d3.keys(data[0]).filter(function(key) { return key !== "date"; }));
  data.forEach(function(d) {
  	d.date = parseDate(d.date);
  });

  var browsers = stack(color.domain().map(function(name) {
    return {
      name: name,
      values: data.map(function(d) {
        return {date: d.date, y: d[name] * 1};
      })
    };
  }));

  // Find the value of the day with highest total value
  var maxDateVal = d3.max(data, function(d){
    var vals = d3.keys(d).map(function(key){ return key !== "date" ? d[key] : 0 });
    return d3.sum(vals);
  });

  // Set domains for axes
  x.domain(d3.extent(data, function(d) { return d.date; }));
  y.domain([0, maxDateVal])

  var browser = svg.selectAll(".browser")
      .data(browsers)
    .enter().append("g")
      .attr("class", "browser");

  browser.append("path")
      .attr("class", "area")
      .attr("d", function(d) { return area(d.values); })
      .style("fill", function(d) { return color(d.name); });

  browser.append("text")
      .datum(function(d) { return {name: d.name, value: d.values[d.values.length - 1]}; })
      .attr("transform", function(d) { return "translate(" + x(d.value.date) + "," + y(d.value.y0 + d.value.y / 2) + ")"; })
      .attr("x", -6)
      .attr("dy", ".35em")
      .text(function(d) { return d.name; });

  svg.append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + height + ")")
      .call(xAxis);

  svg.append("g")
      .attr("class", "y axis")
      .call(yAxis);
});

</script>

## thumbnail.png

      
        

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              thumbnail.png