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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title>MindGapper.js</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.5.1/jquery.min.js"></script>
<script src="html5slider.js"></script>
<script type="text/javascript">
// turn raw csv text into an array of arrays (rows)
// being sure to reassemble any values that were quoted (and accidentally split)
function CSV(text) {
return text.split('\n').map(function(rowText) {
var rawValues = rowText.split(','),
finalValues = [],
value;
while (rawValues.length > 0) {
value = rawValues.shift();
if (value.charAt(0) == '"') {
while (value.charAt(value.length-1) != '"' && rawValues.length > 0) {
value += ',' + rawValues.shift();
}
}
finalValues.push(value);
}
return finalValues;
});
}
$(function() {
var GDP = {},
countriesWithGDP = [],
yearsWithGDP = [];
var LE = {},
countriesWithLE = [],
yearsWithLE = [];
var POP = {},
countriesWithPOP = [],
yearsWithPOP = [];
var numLoaded = 0;
function checkLoaded() {
numLoaded++;
if (numLoaded == 4) {
mergeData();
}
}
function parseTable(data, countries, years) {
return function(csv) {
var rows = CSV(csv),
theYears = rows[0].slice(1).map(Number);
for (var y = 0; y < theYears.length; y++) {
years.push(theYears[y]);
}
for (var i = 1; i < rows.length; i++) {
var row = rows[i],
country = row[0],
values = row.slice(1).map(Number);
// TODO: interpolate zero values? WWGMD?
if (values.length > 0) {
while (values.length < years.length) {
// pad to years.length
values.push(0);
}
countries.push(country);
data[country] = values;
}
}
checkLoaded();
}
}
$.get('data/gdp_per_capita_ppp.csv', parseTable(GDP, countriesWithGDP, yearsWithGDP));
$.get('data/life_expectancy_at_birth.csv', parseTable(LE, countriesWithLE, yearsWithLE));
$.get('data/indicator_gapminder_population.csv', parseTable(POP, countriesWithPOP, yearsWithPOP));
var colors = [ '#3F4FFF', '#2FBFE5', '#68FF5E', '#E5FF2F', '#FF982F', '#FF2F2F' ],
regions = [];
countryRegions = {};
$.get('data/color_regions.csv', function(csv) {
var rows = CSV(csv),
uniqueRegions = {};
for (var i = 1; i < rows.length; i++) {
var row = rows[i],
country = row[0],
region = row[1];
if (!(region in uniqueRegions)) {
uniqueRegions[region] = true;
regions.push(region);
}
countryRegions[country] = region;
}
checkLoaded();
});
var uniqueCountries = {},
countries = [],
minGDP,
maxGDP,
minLE,
maxLE,
minYear,
maxYear,
minPOP,
maxPOP,
years;
function mergeData() {
// the years are the same for the GDP and LE files:
years = yearsWithLE;
minYear = Math.min.apply(null, years);
maxYear = Math.max.apply(null, years);
// countries aren't the same, so let's find the unique ones
function rememberUnique(country) {
if (country in uniqueCountries) {
return;
}
uniqueCountries[country] = true;
countries.push(country);
};
countriesWithLE.forEach(rememberUnique);
countriesWithGDP.forEach(rememberUnique);
countriesWithPOP.forEach(rememberUnique);
countries.sort();
// and filter ones that don't have data in both
countries = countries.filter(function(name) {
return (name in LE) && (name in GDP) && (name in POP);
});
// measure GDP and LE and POP:
minGDP = maxGDP = GDP[countries[0]][0];
minLE = maxLE = LE[countries[0]][0];
minPOP = maxPOP = POP[countries[0]][0];
countries.forEach(function(country) {
for (var i in GDP[country]) {
minGDP = Math.min(minGDP, GDP[country][i]);
maxGDP = Math.max(maxGDP, GDP[country][i]);
}
for (var i in LE[country]) {
minLE = Math.min(minLE, LE[country][i]);
maxLE = Math.max(maxLE, LE[country][i]);
}
for (var i in POP[country]) {
minPOP = Math.min(minPOP, POP[country][i]);
maxPOP = Math.max(maxPOP, POP[country][i]);
}
});
// TODO: better!
minGDP = 300;
maxLE = 85;
minLE = 10;
initControls();
}
function initControls() {
$('#slider')
.attr('min', minYear)
.attr('max', maxYear)
.attr('value', maxYear)
.attr('step', 0.25)
.change(function() {
if (interval) {
clearInterval(interval);
interval = 0;
$('#play').html('▶ Play');
}
renderChart();
});
$('#play').click(animate);
// go!
renderAxes();
renderLegend();
renderMap();
renderChart();
}
var interval = 0;
function animate() {
if (interval) {
clearInterval(interval);
interval = 0;
$('#play').html('▶ Play');
return;
}
$('#play').html('◼ Stop');
var $slider = $('#slider')
min = Number($slider.attr('min')),
max = Number($slider.attr('max'));
$slider.attr('value',min);
interval = setInterval(function() {
var value = Number($slider.attr('value'));
if (value < max) {
$slider.attr('value', value+0.25);
renderChart();
}
else {
clearInterval(interval);
interval = 0;
$('#play').html('▶ Play');
}
}, 25);
}
/// hat-tip http://jsfromhell.com/array/search
function search(o, v, i){
var h = o.length, l = -1, m;
while(h - l > 1)
if(o[m = h + l >> 1] < v) l = m;
else h = m;
return o[h] != v ? i ? h : -1 : h;
}
function findBest(year,years,values) {
var index = search(years,year,true);
if (year == years[index] && values[index] != 0) {
return values[index];
}
var lowerIndex = Math.max(0,index-1);
var lower = values[lowerIndex];
while (lower == 0 && lowerIndex > 0) {
lowerIndex--;
lower = values[lowerIndex]
}
var higherIndex = index;
var higher = values[higherIndex];
while (higher == 0 && higherIndex < values.length-1) {
higherIndex++;
higher = values[higherIndex]
}
if (higher == 0) {
// use the last known value
return lower;
}
if (lower == 0) {
// skip data that would need extrapolating back in time
return NaN;
}
var lowYear = years[lowerIndex];
var highYear = years[higherIndex];
var p = (year-lowYear) / (highYear-lowYear);
var value = lower + (higher-lower)*p;
// if (isNaN(value)) {
// console.log(index,lowerIndex,higherIndex,lower,higher,lowYear,highYear,p);
// }
return value;
}
function renderAxes() {
var canvas = $('#axes')[0],
ctx = canvas.getContext('2d'),
w = canvas.width,
h = canvas.height;
ctx.clearRect(0,0,w,h);
var chartX = 40,
chartY = 5,
chartWidth = w-40,
chartHeight = h-40;
ctx.strokeStyle = '#ccc';
ctx.lineWidth = 0.5;
ctx.moveTo(chartX+0.5,chartY);
ctx.lineTo(chartX+0.5,chartY+chartHeight);
ctx.stroke();
ctx.moveTo(chartX,chartY+chartHeight+0.5);
ctx.lineTo(chartX+chartWidth,chartY+chartHeight+0.5);
ctx.stroke();
var yLabels = [],
xLabels = [];
for (var axisLE = minLE; axisLE <= maxLE; axisLE += 5) {
var axisY = 0.5+Math.floor((chartY+chartHeight) - (chartHeight * (axisLE-minLE) / (maxLE-minLE)));
ctx.moveTo(chartX,axisY);
ctx.lineTo(chartX+chartWidth,axisY);
ctx.stroke();
yLabels.push({ x: chartX, y: axisY, value: axisLE });
}
var l = function(n) { return Math.log(n) / Math.LN10; };
var gdpStep = Math.pow(10, Math.floor(l(minGDP)));
var prevStep = gdpStep;
for (var axisGDP = minGDP; axisGDP <= maxGDP; axisGDP += gdpStep) {
var axisGdpL = l(axisGDP);
var axisX = 0.5+Math.floor(chartX + (chartWidth * (axisGdpL-l(minGDP)) / (l(maxGDP)-l(minGDP))));
ctx.moveTo(axisX,chartY);
ctx.lineTo(axisX,chartY+chartHeight);
ctx.stroke();
prevStep = gdpStep;
// update step continuously
gdpStep = Math.pow(10, Math.floor(l(axisGDP*1.01))); // !!! 1.01 is a fudge to get the step high enough
if (prevStep != gdpStep) {
xLabels.push({ x: axisX, y: chartY+chartHeight, value: axisGDP });
}
}
ctx.textAlign = 'right';
ctx.textBaseline = 'middle';
ctx.fillStyle = '#444';
yLabels.forEach(function(label) {
ctx.fillText(label.value, label.x - 3, label.y);
});
ctx.textAlign = 'center';
ctx.textBaseline = 'top';
ctx.fillStyle = '#444';
xLabels.forEach(function(label) {
ctx.fillText(label.value, label.x, label.y + 3);
});
ctx.save();
ctx.translate(5,chartY+chartHeight/2);
ctx.rotate(-Math.PI*0.5);
ctx.fillText('Life expectancy (years) (lin)', 0, 0);
ctx.restore();
ctx.fillText('Income per person (GDP/capita, PPP$ inflation-adjusted) (log)', chartX+chartWidth/2, chartY+chartHeight+15);
}
function renderMap() {
var canvas = $('#map')[0],
ctx = canvas.getContext('2d'),
w = canvas.width,
h = canvas.height;
ctx.clearRect(0,0,w,h);
var img = new Image();
img.onload = function() {
ctx.drawImage(img,0,h-img.height);
ctx.textAlign = 'left';
ctx.textBaseline = 'top';
ctx.fillStyle = '#444';
ctx.fillText('Color: geographic regions', 0, 0);
}
img.src = 'map/world.png';
}
function renderLegend() {
var canvas = $('#bubblelegend')[0],
ctx = canvas.getContext('2d'),
w = canvas.width,
h = canvas.height;
var minRadius = 1.5,
maxRadius = 25 + minRadius;
ctx.clearRect(0,0,w,h);
ctx.textAlign = 'left';
ctx.textBaseline = 'top';
ctx.fillStyle = '#444';
ctx.fillText('Size: population, total', 0, 0);
ctx.strokeStyle = '#888';
ctx.beginPath();
ctx.moveTo(0, h-0.5);
ctx.lineTo(w, h-0.5);
ctx.stroke();
ctx.strokeStyle = '#888';
ctx.fillStyle = '#ddd';
ctx.beginPath();
ctx.arc(maxRadius, h-0.5, maxRadius, 0, Math.PI, true);
ctx.fill();
ctx.stroke();
ctx.beginPath();
ctx.arc(minRadius, h-0.5, minRadius, 0, Math.PI, true);
ctx.fill();
ctx.stroke();
ctx.textAlign = 'left';
ctx.textBaseline = 'bottom';
ctx.fillStyle = '#444';
ctx.fillText(formatPop(minPOP), 2*minRadius, h);
ctx.fillText(formatPop(maxPOP), 2*maxRadius, h);
}
function formatPop(n) {
if (n > 1000000000) {
return (n / 1000000000).toFixed(2) + "B";
}
else if (n > 1000000) {
return (n / 1000000).toFixed(2) + "M";
}
return n.toFixed(2);
}
function renderChart() {
$('#year').html(Number($('#slider').attr('value')).toFixed(0));
var year = Number($('#slider').attr('value')),
canvas = $('#chart')[0],
ctx = canvas.getContext('2d'),
w = canvas.width,
h = canvas.height;
ctx.clearRect(0,0,w,h);
var chartX = 40,
chartY = 5,
chartWidth = w-40,
chartHeight = h-40;
var l = function(n) { return Math.log(n) / Math.LN10; };
var minRadius = 1.5,
maxRadius = 25 + minRadius;
var circles = countries.map(function(country) {
var gdp = findBest(year,yearsWithGDP,GDP[country]),
le = findBest(year,yearsWithLE,LE[country]),
pop = findBest(year,yearsWithPOP,POP[country]),
x = chartX + (chartWidth * (l(gdp)-l(minGDP)) / (l(maxGDP)-l(minGDP))),
y = (chartY+chartHeight) - (chartHeight * (le-minLE) / (maxLE-minLE)),
r = minRadius + ((maxRadius-minRadius) * Math.sqrt((pop-minPOP) / (maxPOP-minPOP))),
c = colors[regions.indexOf(countryRegions[country])];
// skip data that would need extrapolating back in time
if ((isNaN(le) || isNaN(gdp) || isNaN(pop))) {
r = 0;
}
return { x: x, y: y, r: r, c: c };
});
circles.sort(function(b,a) { return a.r < b.r ? -1 : a.r > b.r ? 1 : 0; });
ctx.strokeStyle = 'rgba(0,0,0,0.5)';
ctx.lineWidth = 1.0;
circles.forEach(function(c) {
ctx.fillStyle = c.c;
ctx.beginPath();
ctx.arc(c.x,c.y,c.r,0,2*Math.PI,true);
ctx.fill();
ctx.stroke();
});
}
});
</script>
<style type="text/css">
body {
margin: 0;
padding: 50px;
background: #fff;
color: #222;
font-family: Helvetica, Arial, sans-serif;
}
h1, h2, #container, #controls, p {
margin: 0px 0px 20px 0px;
}
h1, h2 {
color: #666;
}
p {
width: 600px;
margin-top: 25px;
}
hr {
margin: 25px 0 0 0;
width: 600px;
}
#container {
position: relative;
display: block;
width: 600px;
height: 400px;
}
#chart, #axes {
display: block;
position: absolute;
left: 0;
top: 0;
}
#bubblelegend {
display: block;
position: absolute;
left: 610px;
bottom: 35px;
}
#map {
display: block;
position: absolute;
left: 610px;
top: 5px;
}
h2#year {
display: block;
position: absolute;
left: 0;
top: 0;
width: 560px;
height: 395px;
color: #eee;
vertical-align: middle;
text-align: center;
font-size: 244px;
line-height: 400px;
margin: 5px 0 0 40px;
padding: 0;
}
#controls input, #controls button {
vertical-align: middle;
}
#slider {
width: 500px;
}
#play {
width: 80px;
text-align: center;
margin: 0px 10px;
}
</style>
</head>
<body>
<h1>MindGapper</h1>
<h2>Wealth & Health of Nations</h2>
<div id="container">
<h2 id="year">year</h2>
<canvas id="axes" width="600" height="400"></canvas>
<canvas id="chart" width="600" height="400"></canvas>
<canvas id="map" width="125" height="75"></canvas>
<canvas id="bubblelegend" width="125" height="50"></canvas>
</div>
<div id="controls">
<button id="play">▶ Play</button><input type="range" id="slider">
</div>
<hr>
<p>With much love and respect for <a href="http://www.gapminder.org/world/">Gapminder World</a>,
where you'll find more comprehensive data, full attributions, legends, tooltips, animation trails and
<a href="http://www.gapminder.org/GapminderMedia/wp-uploads/tutorial/Gapminder_World_Guide.pdf">much more</a>.</p>
<p>It's easy to overlook <a href="http://www.gapminder.org/documentation/documentation/gapdoc003.pdf">the amount
of work</a> that goes into making something look simple. Wow.</p>
<hr>
<p>Made by Tom Carden, <a href="mailto:tom@bloom.io">tom@bloom.io</a>, March 2011.</p>
</body>
</html>