D3 Stacked Area Chart Example

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

forked from mdml's block: D3 Stacked Area Chart Example

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

body {
  font: 10px avenir;
}

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

.browser text {
  text-anchor: end;
}

</style>
<body>
<script src="https://d3js.org/d3.v3.js"></script>
<script>
  
function get_colors(n) {
var colors = ["#a6cee3","#1f78b4","#b2df8a","#33a02c",
"#fb9a99","#e31a1c","#fdbf6f","#ff7f00","#cab2d6",
"#6a3d9a"];

return colors[ n % colors.length];}
  
var margin = {top: 61, right: 140, bottom: 101, left: 50},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

var  times = ["12am","1a", "2a", "3a", "4a", "5a", "6a",
           "7a", "8a", "9a", "10a", "11a", "12pm", "1p",
           "2p", "3p", "4p", "5p", "6p", "7p", "8p",
           "9p", "10p", "11p"];

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

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

var color = d3.scale.category10();

var xAxis = d3.svg.axis()
    .scale(x)
    .orient("bottom")
		.ticks(24, "s");

var yAxis = d3.svg.axis()
    .scale(y)
    .orient("left")
    .ticks(5, "s");

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

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

//   // Set domains for axes
  x.domain(d3.extent(data, function(d) { return d.hour; }));
  y.domain([0, 800])

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,i) { 
    		return get_colors(i); });

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.hour) + "," + y(d.value.y0 + d.value.y / 2) + ")"; })
      .attr("x", -6)
      .attr("dy", "-0.882em")
      .text(function(d) { 
    			if(d.name == "larceny_theft"){
            return "larceny/theft";
          }
     			if(d.name == "non_criminal"){
            return "non-criminal";
          }    
       		if(d.name == "assault"){
            return d.name;
          }})
      .style("font", "15px avenir")
  		.attr("transform", function(d) { return "translate(500," + y(d.value.y0 + d.value.y / 2) + ")"; })

svg.append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + height + ")")
      .call(xAxis).append("text")
   		.attr("x", 350)
      .attr("y", 36)
      .attr("fill", "#000")
      .text("Hour of Time")
    	.style("font-weight", "bold");

svg.append("g")
      .attr("class", "y axis")
      .call(yAxis)
      .append("text")
      .attr("transform", "rotate(-90)")
  		.attr("x", -250)
      .attr("y", -40)
      .attr("dy", "0.3408em")
      .attr("fill", "#000")
      .text("Number of Incidents")
   		.style("font-weight", "bold");
      
   var legend = svg.selectAll(".legend")
     	.data(color.domain()).enter()
   		.append("g")
    	.attr("class","legend")
     .attr("transform", "translate(" + (width +20) + "," + 0+ ")");

legend.append("rect")
     .attr("x", 0) 
     .attr("y", function(d, i) { return 20 * i; })
     .attr("width", 10)
     .attr("height", 10)
     .style("fill", function(d, i) {
     	return get_colors(i);}); 
   
    legend.append("text")
     .attr("x", 20) 
     .attr("dy", "0.75em")
     .attr("y", function(d, i) { return 20 * i; })
     .text(function(d) {return d});
      
    legend.append("text")
     .attr("x",0) 
//      .attr("dy", "0.75em")
     .attr("y",-10)
     .text("Categories");

});

</script>

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

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