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index.html
<!DOCTYPE html>
<html lang="en">
<head>
<title>dc.js multi-line chart attempt</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" type="text/css" href="http://nickqizhu.github.io/dc.js/css/dc.css"/>
<link rel="stylesheet" type="text/css" href="http://nickqizhu.github.io/dc.js/css/bootstrap.min.css"/>
</head>
<body>
<script type="text/javascript" src="http://nickqizhu.github.io/dc.js/js/d3.js"></script>
<script type="text/javascript" src="http://nickqizhu.github.io/dc.js/js/crossfilter.js"></script>
<script type="text/javascript" src="http://nickqizhu.github.io/dc.js/js/dc.js"></script>
<div class="container">
<h1>Multi-Line Chart in dc.js</h1>
<div class="row">
<div id="data-count" class="span12">
Showing <span class="filter-count"/></span> of <span class="total-count"></span> data points
| <a href="javascript:dc.filterAll(); dc.renderAll();">Reset All</a>
</div>
</div>
<div class="row">
<div id="time-chart" class="dc-chart span6">
<strong>Time</strong>
<small class="text-muted">
<time id="date-start" datetime="2012-08-26 20:09-0700">8:09pm on August 26th, 2012</time> &ndash;
<time id="date-end" datetime="2012-08-26 20:09-0700">8:09pm on August 26th, 2012</time>
</small>
<a class="reset" href="javascript:time_chart.filterAll(); dc.redrawAll();" style="display: none;">
reset
</a>
<div class="clearfix"></div>
</div>
<div id="temp-chart" class="dc-chart span6">
<strong>Temperature</strong>
<a class="reset" href="javascript:temp_chart.filterAll(); dc.redrawAll();" style="display: none;">
reset
</a>
<div class="clearfix"></div>
</div>
</div>
</div> <!-- end container -->
<script type="text/javascript">
// charts
var time_chart = dc.seriesChart("#time-chart"),
temp_chart = dc.barChart("#temp-chart"),
width = temp_chart.root()[0][0].parentElement.clientWidth;
var coerce_row = function(d){
return {
time: new Date(+d[0] * 1000.0),
field: d[1],
temperature: +d[2],
count: +d[3],
};
};
var data = [
//['time', 'text', 'temperature', 'count'],
['1379952000', 'field_1', 91, 56],
['1379952000', 'field_2', 50, 20],
['1379952000', 'field_3', 88, 24],
['1379952000', 'field_4', 50, 37],
['1379953200', 'field_1', 97, 58],
['1379953200', 'field_2', 84, 86],
['1379953200', 'field_3', 85, 62],
['1379953200', 'field_4', 88, 73],
['1379954400', 'field_1', 89, 38],
['1379954400', 'field_2', 52, 26],
['1379954400', 'field_3', 98, 66],
['1379954400', 'field_4', 96, 38],
['1379955600', 'field_1', 95, 98],
['1379955600', 'field_2', 88, 12],
['1379955600', 'field_3', 57, 95],
['1379955600', 'field_4', 94, 80],
['1379956800', 'field_1', 77, 51],
['1379956800', 'field_2', 50, 19],
['1379956800', 'field_3', 58, 23],
['1379956800', 'field_4', 99, 29],
['1379958000', 'field_1', 75, 28],
['1379958000', 'field_2', 57, 16],
['1379958000', 'field_3', 65, 53],
['1379958000', 'field_4', 84, 37],
['1379959200', 'field_1', 98, 72],
['1379959200', 'field_2', 71, 63],
['1379959200', 'field_3', 50, 68],
['1379959200', 'field_4', 51, 72],
['1379960400', 'field_1', 91, 64],
['1379960400', 'field_2', 64, 77],
['1379960400', 'field_3', 89, 13],
['1379960400', 'field_4', 62, 85],
['1379961600', 'field_1', 82, 69],
['1379961600', 'field_2', 53, 70],
['1379961600', 'field_3', 74, 48],
['1379961600', 'field_4', 66, 29]
];
var dataset = data.map(coerce_row);
var addC = function(p, d){ return p + d.count;},
remC = function(p, d){ return p - d.count;},
addT = function(p, d){ return p + d.temperature;},
remT = function(p, d){ return p - d.temperature;},
ini = function(){ return 0;},
ndx = crossfilter(dataset),
all = ndx.groupAll().reduce(addC, remC, ini),
fields = ndx.dimension(function(d){ return d.field;}).group(),
time_field = ndx.dimension(function(d) { return [d.time, d.field];}),
time_fields = time_field.group().reduce(addT, remT, ini),
temperature = ndx.dimension(function(d){return d.temperature;}),
temperatures = temperature.group().reduce(addC, remC, ini);
extent = d3.extent(dataset, function(d){return d.time;}),
date_format = d3.time.format("%b %d %I:%M %p"),
d3.select("#date-start")
.attr("datetime", extent[0])
.text(date_format(extent[0]));
d3.select("#date-end")
.attr("datetime", extent[1])
.text(date_format(extent[1]));
dc.dataCount("#data-count")
// Since the number of records (returned by .size()) isn't the same as the number
// of data points we're aggregating, supply a size-like object that returns the
// total number of data points represented.
.dimension({size: function(){return dataset.reduce(addC, 0);}})
.group(all);
time_chart
.width(.5 * width)
.height(400)
.dimension(time_field)
.group(time_fields)
.seriesAccessor(function(d) { return d.key[1]; })
.keyAccessor(function(d) {return d.key[0];})
.elasticY(true)
.elasticX(true)
.xAxisLabel("Observation Time")
.yAxisLabel("Temperature")
.x(d3.time.scale().domain(extent))
.renderHorizontalGridLines(true)
.renderVerticalGridLines(true)
.legend(dc.legend().x(0.35*width).y(260).itemHeight(13).gap(5))
.brushOn(false);
temp_chart
.width(.5 * width)
.dimension(temperature)
.x(d3.scale.linear().domain([0, 100]))
.xAxisLabel("Temperature °F")
.elasticX(true)
.height(400)
.group(temperatures)
.elasticY(true)
.yAxisLabel("Count")
.renderHorizontalGridLines(true);
dc.renderAll();
</script>
</body>
</html>
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