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<html lang="en">
<head>
<meta charset="utf-8">
<title>Line Chart with Two Lines</title>
<script type="text/javascript" src="https://d3js.org/d3.v3.js"></script>
<style type="text/css">
body {
background-color: white;
font-family: Helvetica, Arial, sans-serif;
}
h1 {
font-size: 24px;
margin: 0;
}
p {
font-size: 14px;
margin: 10px 0 0 0;
}
svg {
background-color: white;
}
circle:hover {
fill: orange;
}
.axis path,
.axis line {
fill: none;
stroke: black;
shape-rendering: crispEdges;
}
.axis text {
font-family: sans-serif;
font-size: 11px;
}
</style>
</head>
<body>
<h1>Hourly Solar Radiation on Oahu Island</h1>
<p>The <strong style="color: steelblue;">2013’</strong> and <strong style="color: red;">2014’s</strong> Solar Radiation Intensities on Oahu Island (Month-Day-Hour) format. Source: <a href="mesowest.utah.edu">MesoWest Utah</a>, 2014</p>
<script type="text/javascript">
//Dimensions and padding
var w = 100000;
var h = 600;
var padding = [ 20, 10, 50, 100 ]; //Top, right, bottom, left
//Set up date formatting and timestamps
var dateFormat = d3.time.format("%m-%d-%H");
//Set up scales
var xScale = d3.time.scale()
.range([ padding[3], w - padding[1] - padding[3] ]);
var yScale = d3.scale.linear()
.range([ padding[0], h - padding[2] ]);
//Configure axis generators
var xAxis = d3.svg.axis()
.scale(xScale)
.orient("bottom")
.ticks(15)
.tickFormat(function(d) {
return dateFormat(d);
});
var yAxis = d3.svg.axis()
.scale(yScale)
.orient("left");
//Configure line generator
var line = d3.svg.line()
.x(function(d) {
return xScale(dateFormat.parse(d.timestamp));
})
.y(function(d) {
return yScale(d.SOLR);
});
//Create the empty SVG image
var svg = d3.select("body")
.append("svg")
.attr("width", w)
.attr("height", h);
//Load USA data
d3.csv("scbh2013.csv", function(data2013) {
//Load China data
d3.csv("scbh2014.csv", function(data2014) {
//Create a new array that contains both the
//USA and China data, merged into one
var mergedData = data2013.concat(data2014);
//console.log(mergedData);
//Use the newly merged data to determine the
//min and max values, for setting scale domains
xScale.domain([
d3.min(mergedData, function(d) {
return dateFormat.parse(d.timestamp);
}),
d3.max(mergedData, function(d) {
return dateFormat.parse(d.timestamp);
})
]);
yScale.domain([
d3.max(mergedData, function(d) {
return +d.SOLR;
}),
0
]);
//Lines
//
// Note data is wrapped in another array, so all its
// values are bound to a single element (the line!)
//
svg.data([ data2013 ])
.append("path")
.attr("class", "line usa")
.attr("d", line)
.attr("fill", "none")
.attr("stroke", "steelblue")
.attr("stroke-width", 2);
svg.data([ data2014 ])
.append("path")
.attr("class", "line china")
.attr("d", line)
.attr("fill", "none")
.attr("stroke", "red")
.attr("stroke-width", 2);
//Axes
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + (h - padding[2]) + ")")
.call(xAxis);
svg.append("g")
.attr("class", "y axis")
.attr("transform", "translate(" + (padding[3]) + ",0)")
.call(yAxis);
});
//End China data load function
});
//End USA data load function
</script>
</body>
</html>
Modified http://d3js.org/d3.v3.js to a secure url
https://d3js.org/d3.v3.js