Rough recreation of the "per capita consuption of mozzarella cheese & civil engineering doctorates awarded" correlation plot from Spurious Correlations blog (http://www.tylervigen.com/spurious-correlations)
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August 16, 2017 20:48
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Spurious Correlations Dual Axis Line Chart
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year | cheese | doctorates | |
---|---|---|---|
2000 | 9.3 | 480 | |
2001 | 9.7 | 501 | |
2002 | 9.7 | 540 | |
2003 | 9.7 | 552 | |
2004 | 9.9 | 547 | |
2005 | 10.2 | 622 | |
2006 | 10.5 | 655 | |
2007 | 11 | 701 | |
2008 | 10.6 | 712 | |
2009 | 10.6 | 708 |
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<script src="https://d3js.org/d3.v4.min.js"></script> | |
<style type="text/css"> | |
:root { | |
--highlight-color:red; | |
} | |
.axis .tick { | |
stroke-width:0.5px; | |
stroke-opacity: .5; | |
} | |
.axis path { | |
stroke: none; | |
} | |
.line { | |
stroke: black; | |
fill: none; | |
stroke-width: 1.5; | |
} | |
.axis.cheese text { | |
fill: var(--highlight-color); | |
} | |
.cheese-circle { | |
fill: var(--highlight-color); | |
} | |
.line.cheese { | |
stroke: var(--highlight-color); | |
} | |
</style> | |
<body> | |
<p class="details"></p> | |
</body> | |
<script> | |
var margin = {top: 20, right: 40, bottom: 30, left: 40}; | |
var width = 900 - margin.left - margin.right, | |
height = 250 - 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 + ")"); | |
var xScale = d3.scaleLinear() | |
.domain([1999, 2010]) | |
.range([0, width]); | |
var cheeseScale = d3.scaleLinear() | |
.domain([9, 12]) | |
.range([height, 0]); | |
var doctorateScale = d3.scaleLinear() | |
.domain([400, 1000]) | |
.range([height, 0]) | |
var xAxis = d3.axisBottom(xScale) | |
.tickFormat(d3.format("d")); | |
var cheeseAxis = d3.axisLeft(cheeseScale) | |
.ticks(4) | |
.tickSize(-width); | |
var doctorateAxis = d3.axisRight(doctorateScale) | |
.ticks(4) | |
.tickSize(0); | |
d3.csv("cheese_engineers.csv", ready) | |
function ready(error, data) { | |
if (error) return console.warn(error); | |
svg.append('g') | |
.attr('class', 'x axis') | |
.attr('transform', 'translate(0, ' + height + ')') | |
.call(xAxis) | |
svg.append('g') | |
.attr('class', 'cheese axis') | |
.call(cheeseAxis) | |
svg.append('g') | |
.attr('class', 'doctorate axis') | |
.attr('transform', 'translate(' + width + ', 0)') | |
.call(doctorateAxis) | |
function select_year(d) { | |
var this_year = 'year' + d.year; | |
d3.select(".details").text('In ' + d.year + ', ' + d.cheese + ' pounds of mozzarella cheese was consumed, and ' + d.doctorates + ' Civil Engineering Doctorates were awarded') | |
d3.selectAll('.circle') | |
.attr('r', 5) | |
d3.selectAll('.' + this_year) | |
.transition() | |
.attr('r', 15) | |
} | |
function deselect_year(d) { | |
d3.selectAll('.circle') | |
.transition() | |
.attr('r', 5) | |
} | |
var cheeseCircle = svg.selectAll('.cheese-circle') | |
.data(data) | |
.enter().append('circle') | |
.attr('class', 'cheese-circle') | |
.attr("class", function(d) { return 'cheese-circle circle ' + 'year' + d.year }) | |
.attr('r', 5) | |
.attr('cx', function(d) { return xScale(d.year) }) | |
.attr('cy', function(d) { return cheeseScale(d.cheese)}) | |
.attr('fill', 'red') | |
.on('mouseover', function(d) { | |
select_year(d) | |
}) | |
.on('mouseout', function(d) { | |
deselect_year(d) | |
}); | |
var cheeseLineGenerator = d3.line() | |
.x(function(d) { return xScale(d.year) }) | |
.y(function(d) { return cheeseScale(d.cheese)}) | |
var cheesePath = svg.append('path') | |
.datum(data) | |
.attr('class', 'line') | |
.attr('d', cheeseLineGenerator(data)) | |
.style('stroke', 'red') | |
var doctorateCircle = svg.selectAll('.doctorate-circle') | |
.data(data) | |
.enter().append('circle') | |
.attr("class", function(d) { return 'doctorate-circle circle ' + 'year' + d.year }) .attr('r', 5) | |
.attr('cx', function(d) { return xScale(d.year) }) | |
.attr('cy', function(d) { return doctorateScale(d.doctorates)}) | |
.on('mouseover', function(d) { | |
select_year(d) | |
}) | |
.on('mouseout', function(d) { | |
deselect_year(d) | |
}); | |
var doctorateLineGenerator = d3.line() | |
.x(function(d) { return xScale(d.year) }) | |
.y(function(d) { return doctorateScale(d.doctorates)}) | |
var doctoratePath = svg.append('path') | |
.datum(data) | |
.attr('class', 'line') | |
.attr('d', doctorateLineGenerator(data)); | |
svg.append("text") | |
.attr("transform", "rotate(-90)") | |
.attr("y", 0 - margin.left) | |
.attr("x",0 - (height / 2)) | |
.attr("dy", "1em") | |
.style("text-anchor", "middle") | |
.text("Mozzarella cheese consumption (lbs)") | |
.attr('fill', 'red'); | |
svg.append("text") | |
.attr("transform", "rotate(-90)") | |
.attr("y", width + 20) | |
.attr("x",0 - (height / 2)) | |
.attr("dy", "1em") | |
.style("text-anchor", "middle") | |
.text("Civil Engineering Doctorates"); | |
} | |
</script> |
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