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A set of line charts using D3.js
<html>
<meta http-equiv="Content-type" content="text/html;charset=UTF-8">
<head>
<title>D3.js Dashboard Introduction</title>
<script src="http://d3js.org/d3.v2.js"></script>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.21/jquery-ui.min.js"></script>
<script>
function getMaxObjectValue(metric, graph_metric) {
var values = [];
for (var i = 0; i < metric.length; i++) {
for (var k = 0; k < graph_metric.length; k++) {
if (parseFloat(metric[i][""+graph_metric[k]]) < 1) {
values.push(parseFloat(metric[i][""+graph_metric[k]]));
} else {
values.push(Math.ceil(parseFloat(metric[i][""+graph_metric[k]])));
}
}
}
values.sort(function(a,b){return a-b});
return values[values.length-1];
}
function getMinObjectValue(metric, graph_metric) {
var values = [];
for (var i = 0; i < metric.length; i++) {
for (var k = 0; k < graph_metric.length; k++) {
if (parseFloat(metric[i][""+graph_metric[k]]) < 1) {
values.push(parseFloat(metric[i][""+graph_metric[k]]));
} else {
values.push(Math.floor(parseFloat(metric[i][""+graph_metric[k]])));
}
}
}
values.sort(function(a,b){return a-b});
return values[0];
}
function getDate(d) {
return new Date(d.date);
}
function buildLineChart(data, title, graph_metric, width, height, xaxislabel, yaxislabel) {
var metric = data.slice(0);
metric.splice(0,1);
// define graph size parameters
var margin = {top: 30, right: 20, bottom: 40, left: 60}, width = width - margin.left - margin.right, height = height - margin.top - margin.bottom;
//color scale for multiple lines
var colorscale = d3.scale.category10();
var minDate = getDate(metric[0]),
maxDate = getDate(metric[metric.length-1]),
minObjectValue = getMinObjectValue(metric, graph_metric),
maxObjectValue = getMaxObjectValue(metric, graph_metric);
//create the graph object
var vis= d3.select("#metrics").append("svg")
.data(metric)
.attr("class", "metrics-container")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var y = d3.scale.linear().domain([ minObjectValue - (.1 * minObjectValue) , maxObjectValue + (.1 * maxObjectValue) ]).range([height, 0]),
x = d3.time.scale().domain([minDate, maxDate]).range([0, width]);
var yAxis = d3.svg.axis()
.scale(y)
.orient("left")
.ticks(5);
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom")
.ticks(metric.length-1);
vis.append("text")
.attr("style", "font-family: Helvetica, Arial; font-size: 18px; font-weight: bold;")
.attr("dx", function(d) { return 10; })
.attr("dy", function(d) { return -10; })
.text(''+title);
//append the axes
vis.append("g")
.attr("class", "axis")
.call(yAxis);
vis.append("g")
.attr("class", "axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
//add the axes labels
vis.append("text")
.attr("class", "axis-label")
.attr("text-anchor", "end")
.attr("x", 20)
.attr("y", height + 34)
.text(xaxislabel);
vis.append("text")
.attr("class", "axis-label")
.attr("text-anchor", "end")
.attr("y", 6)
.attr("dy", "-3.4em")
.attr("transform", "rotate(-90)")
.text(yaxislabel);
var lines = [];
var circles = [];
//loop through graph objects, if it's a single graph there will only be one object
for (var z = 0; z < graph_metric.length; z++) {
lines[z] = d3.svg.line()
.x(function(d) { return x(getDate(d)); })
.y(function(d) { return (isNaN( y(d[''+graph_metric[z]])) ? 0 : y(d[''+graph_metric[z]])); })
vis.append("svg:path")
.attr("d", lines[z](metric))
.style("stroke", function() {
return colorscale(""+z);
})
.style("fill", "none")
.style("stroke-width", "2.5");
var dataCirclesGroup = vis.append('svg:g');
var circles = dataCirclesGroup.selectAll('.data-point')
.data(metric);
circles
.enter()
.append('svg:circle')
.attr('class', 'dot')
.attr('fill', function() { return colorscale(""+z); })
.attr('cx', function(d) { return x(getDate(d)); })
.attr('cy', function(d) { return (isNaN( y(d[''+graph_metric[z]])) ? 0 : y(d[''+graph_metric[z]])); })
.attr('r', function() { return 3; })
.on("mouseover", function(d) {
d3.select(this)
.attr("r", 8)
.attr("class", "dot-selected")
.transition()
.duration(750);
})
.on("mouseout", function(d) {
d3.select(this)
.attr("r", 3)
.attr("class", "dot")
.transition()
.duration(750);
})
.append("svg:title")
.text(function(d) {
var return_text = "";
if (graph_metric.length > 1) {
return_text += graph_metric[z] + "\n";
}
return_text += $.datepicker.formatDate('yy-mm-dd', new Date(d.date)) + ": ";
return_text += Math.round(d[''+graph_metric[z]] * 100) / 100;
return return_text;
});
}
}
function safeDivide(num1, num2) {
if (isNaN(parseFloat(num2)) || isNaN(parseFloat(num1)) || num2 == 0) {
return 0;
}
return Math.round( parseFloat(num1) / parseFloat(num2) * 100 ) / 100;
}
function createAverages(metric) {
for (var i = 1; i < metric.length; i++) {
metric[i].d1_retention = safeDivide(metric[i].d1_retention, metric[i].DNU) * 100;
metric[i].d7_retention = safeDivide(metric[i].d7_retention, metric[i].DNU) * 100;
metric[i].d30_retention = safeDivide(metric[i].d30_retention, metric[i].DNU) * 100;
metric[i].average_session_length = safeDivide(metric[i].sessions_length, metric[i].sessions) / 60;
metric[i].average_sessions_per_user = safeDivide(metric[i].sessions, metric[i].DAU);
}
return metric;
}
function getData() {
var data = [];
var metrics =
{"countries":
[
{
"country": "USA",
"metrics":
[
{
"date" : "2012-08-19",
"DAU" : 500,
"DNU" : 200,
"sessions" : 100,
"sessions_length" : 2000,
"d1_retention" : 102,
"d7_retention" : 48,
"d30_retention" : 16
},
{
"date" : "2012-08-20",
"DAU" : 800,
"DNU" : 300,
"sessions" : 120,
"sessions_length" : 4000,
"d1_retention" : 82,
"d7_retention" : 58,
"d30_retention" : 19
},
{
"date" : "2012-08-21",
"DAU" : 1000,
"DNU" : 700,
"sessions" : 200,
"sessions_length" : 5000,
"d1_retention" : 549,
"d7_retention" : 126,
"d30_retention" : 9
}
]
}
]
};
$.each(metrics.countries, function() {
data[0] = this.country;
$.each(this.metrics, function() {
var metric = this;
var temp_date = new Date(this.date);
var month = temp_date.getMonth();
var date = temp_date.getDate();
var year = temp_date.getFullYear();
metric.date = month + '/' + date + '/' + year;
data.push(metric);
});
});
return data;
}
$(document).ready(function() {
var data = getData();
data = createAverages(data);
buildLineChart(data, "Retention", ['d1_retention', 'd7_retention', 'd30_retention'], 1000, 300, "Date", "Retention (percentage)");
buildLineChart(data, "Daily New Users", ['DNU'], 500, 300, "Date", "New Users");
buildLineChart(data, "Daily Active Users", ['DAU'], 500, 300, "Date", "Users");
buildLineChart(data, "Average Session Length", ['average_session_length'], 500, 300, "Date", "Session Length (minutes)");
buildLineChart(data, "Average Sessions per User", ['average_sessions_per_user'], 500, 300, "Date", "Sessions per User");
});
</script>
<style>
.axis path, .axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.line {
fill: none;
stroke-width: 1.5px;
}
body {
background: #FFFFFF;
background-repeat:repeat-x;
text-align: center;
font: 10px sans-serif;
}
.dot {
stroke-width: 1.5px;
}
.dot-selected {
fill: #B0C4DE;
stroke: #B0C4DE;
stroke-width: 1.5px;
}
.metrics-container {
width: auto;
height: auto;
padding: 10px 10px 10px 10px;
border-style: solid;
border-width: 1px;
float: left;
margin-left: 20px;
margin-top: 20px;
}
</style>
</head>
<body>
<h1>A D3.js Dashboard</h1>
<div id="metrics">
</div>
</body>
</html>
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