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Stacked bar chart v4 stocks data
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license: mit |
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<!DOCTYPE html> | |
<style> | |
</style> | |
<body> | |
<script src="https://d3js.org/d3.v4.min.js"></script> | |
<script> | |
var margin = {top: 20, right: 30, bottom: 30, left: 40}, | |
width = 960 - margin.left - margin.right, | |
height = 500 - margin.top - margin.bottom; | |
var y = d3.scaleLinear() | |
.rangeRound([height, 0]) | |
.nice(); | |
var x = d3.scaleBand() | |
.rangeRound([0, width]) | |
.paddingInner(0.05) | |
.align(0.1) | |
var z = d3.scaleOrdinal(d3.schemeCategory20) | |
// Date format https://bl.ocks.org/zanarmstrong/ca0adb7e426c12c06a95 | |
var parseTime = d3.timeParse("%b %Y") | |
// Load stocks data | |
// Ex: 0: {symbol: "MSFT", date: "Jan 2000", price: "39.81"} | |
d3.csv('https://raw.githubusercontent.com/LyonDataViz/MOS5.5-Dataviz/master/data/stocks.csv', function(error, raw) { | |
var symbols = []; | |
var data = [] | |
// Data pre-processing | |
raw.forEach(function(d, i) { | |
if(symbols.indexOf(d.symbol) < 0) { | |
symbols.push(d.symbol) | |
data[symbols.indexOf(d.symbol)] = []; | |
} | |
// String to INT | |
d.value = +d.price; | |
// Parsing time | |
d.date = parseTime(d.date) | |
data[symbols.indexOf(d.symbol)].push(d); | |
}); | |
var data_nest = d3.nest() | |
.key(function(d) { return d.date.getFullYear(); }) | |
.key(function(d) { return d.symbol; }) | |
.rollup(function(v) { return d3.sum(v, function(d) { return d.price; }); }) | |
.entries(raw); | |
var years = data_nest.map(function(d) { return d.key; }) | |
// d3-stack format https://github.com/d3/d3-shape/blob/master/README.md#stack_keys | |
// {MSFT: 356.07999999999987, AMZN: 527.17, IBM: 1162.97, AAPL: 260.98} | |
var data_stack = [] | |
data_nest.forEach(function(d, i) { | |
d.values = d.values.map(function(e) { return e.value; }) | |
var t ={} | |
symbols.forEach(function(e, i) { | |
t[e] = d.values[i] | |
}) | |
t.year = d.key; | |
data_stack.push(t) | |
}) | |
console.log(data_stack) | |
var layers = d3.stack().keys(symbols)(data_stack); | |
var max = d3.max(layers[layers.length-1], function(d) { return d[1]; }); | |
y.domain([0, max]); | |
x.domain(years); | |
console.log(data_stack) | |
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 + ")"); | |
svg.append("g").selectAll("g") | |
.data(layers) | |
.enter().append("g") | |
.style("fill", function(d) { return z(d.key); }) | |
.selectAll("rect") | |
.data(function(d) { return d; }) | |
.enter().append("rect") | |
.attr("x", function(d, i) { return x(d.data.year); }) | |
.attr("y", function(d) { return y(d[1]); }) | |
.attr("height", function(d) { return y(d[0]) - y(d[1]); }) | |
.attr("width", x.bandwidth()); | |
svg.append("g") | |
.attr("class", "x axis") | |
.attr("transform", "translate(0," + height + ")") | |
.call(d3.axisBottom(x)) | |
svg.append("g") | |
.attr("class", "y axis") | |
.attr("transform", "translate(" + (0) + ", 0)") | |
.call(d3.axisLeft().scale(y)) | |
}) | |
</script> |
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