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@kcsluis
Created November 1, 2015 23:52
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Line Graph, Two Ways
<!DOCTYPE html>
<head>
<meta charset="utf-8">
<title></title>
<style type="text/css">
body {
font-family: sans-serif;
font-size: 10px;
}
.axis path {
display: none;
}
.axis line {
stroke-width:1px;
stroke: #ccc;
stroke-dasharray: 2px 2px;
}
.line1 {
fill: none;
stroke: #bbb;
stroke-width: 8px;
}
.line2 {
fill: none;
stroke: #000;
}
</style>
</head>
<body>
</body>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js" charset="utf-8"></script>
<script>
var margin = {top: 20, right: 20, bottom: 20, left: 40};
var width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
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 + ")");
// write a custom parser to address the format your dates are in
var parseDate = d3.time.format("%Y-%m").parse;
var xScale = d3.time.scale()
.range([0,width]);
var yScale = d3.scale.linear()
.range([height,0]);
var xAxis = d3.svg.axis()
.scale(xScale)
.orient("bottom");
var yAxis = d3.svg.axis()
.scale(yScale)
.tickSize(-width)
.tickPadding(8)
.orient("left");
var line = d3.svg.line()
.x(function(d) { return xScale(d.date); })
.y(function(d) { return yScale(d.private_job_change); });
d3.tsv("jobs.tsv", ready);
function ready(error, data) {
if (error) return console.warn(error);
data.forEach(function(d) {
d.jobs_change = +d.jobs_change;
d.private_job_change = +d.private_job_change;
d.unemployment_rate = +d.unemployment_rate;
d.date = parseDate(d.month_year);
});
xScale.domain(d3.extent(data, function (d) { return d.date; }));
yScale.domain(d3.extent(data, function (d) { return d.private_job_change; }));
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + (height) + ")")
.call(xAxis);
svg.append("g")
.attr("class", "y axis")
.call(yAxis);
svg.append("path")
.attr("class", "line1")
.attr("d", line(data) );
// "d" is the attribute that sets the path
// this doesn't preserve data join
svg.append("path")
.datum(data)
.attr("class", "line2")
.attr("d", line);
// just like data, but you're only doing one thing (datum)
// this one does preserve the data join
// NEITHER use enter. D3 is weird.
};
</script>
month_year jobs_change private_job_change unemployment_rate
2008-11 -803 -797 6.8
2008-12 -661 -658 7.3
2009-01 -818 -839 7.8
2009-02 -724 -725 8.3
2009-03 -799 -787 8.7
2009-04 -692 -802 8.9
2009-05 -361 -312 9.4
2009-06 -482 -426 9.5
2009-07 -339 -296 9.5
2009-08 -231 -219 9.6
2009-09 -199 -184 9.8
2009-10 -202 -232 10
2009-11 -42 -42 9.9
2009-12 -171 -120 9.9
2010-01 -40 -40 9.7
2010-02 -35 -27 9.8
2010-03 189 141 9.8
2010-04 239 193 9.9
2010-05 516 84 9.6
2010-06 -167 92 9.4
2010-07 -58 92 9.5
2010-08 -51 128 9.6
2010-09 -27 115 9.5
2010-10 220 196 9.5
2010-11 121 134 9.8
2010-12 120 140 9.4
2011-01 110 119 9.1
2011-02 220 257 9
2011-03 246 261 8.9
2011-04 251 264 9
2011-05 54 108 9
2011-06 84 102 9.1
2011-07 96 175 9.1
2011-08 85 52 9.1
2011-09 202 216 9
2011-10 112 139 8.9
2011-11 157 178 8.7
2011-12 223 234 8.5
2012-01 275 277 8.3
2012-02 259 254 8.3
2012-03 143 147 8.2
2012-04 68 85 8.1
2012-05 87 116 8.2
2012-06 45 63 8.2
2012-07 181 163 8.3
2012-08 142 97 8.1
2012-09 114 104 7.8
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