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d3.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>D3 Demo</title>
<style>
.bar rect {
fill: steelblue;
}
.bar text {
fill: #fff;
font: 10px sans-serif;
}
</style>
</head>
<body>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.1.1/d3.min.js"></script>
<script>
var data = d3.range(1000).map(d3.randomBates(10));
var formatCount = d3.format(",.0f");
var margin = {top: 10, right: 30, bottom: 30, left: 30},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var x = d3.scaleLinear()
.rangeRound([0, width]);
var bins = d3.histogram()
.domain(x.domain())
.thresholds(x.ticks(20))
(data);
var y = d3.scaleLinear()
.domain([0, d3.max(bins, function(d) { return d.length; })])
.range([height, 0]);
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 bar = svg.selectAll(".bar")
.data(bins)
.enter().append("g")
.attr("class", "bar")
.attr("transform", function(d) { return "translate(" + x(d.x0) + "," + y(d.length) + ")"; });
bar.append("rect")
.attr("x", 1)
.attr("width", x(bins[0].x1) - x(bins[0].x0) - 1)
.attr("height", function(d) { return height - y(d.length); });
bar.append("text")
.attr("dy", ".75em")
.attr("y", 6)
.attr("x", (x(bins[0].x1) - x(bins[0].x0)) / 2)
.attr("text-anchor", "middle")
.text(function(d) { return formatCount(d.length); });
svg.append("g")
.attr("class", "axis axis--x")
.attr("transform", "translate(0," + height + ")")
.call(d3.axisBottom(x));
</script>
</body>
</html>