| author | Nicolas Sauret <nicolas.sauret@iri.centrepompidou.fr> |
| Fri, 18 Apr 2014 14:31:58 +0200 | |
| changeset 51 | 79833eaa394a |
| parent 47 | c0b4a8b5a012 |
| permissions | -rw-r--r-- |
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47
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<!DOCTYPE html> |
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<html> |
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<head> |
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<title>Histogram</title> |
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<script type="text/javascript" src="../../d3.js"></script> |
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<script type="text/javascript" src="../../d3.layout.js"></script> |
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7 |
<style type="text/css"> |
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body { |
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font: 10px sans-serif; |
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} |
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12 |
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rect { |
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14 |
fill: steelblue; |
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15 |
stroke: white; |
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} |
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line { |
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19 |
stroke: black; |
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20 |
shape-rendering: crispEdges; |
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21 |
} |
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23 |
</style> |
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24 |
</head> |
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25 |
<body> |
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26 |
<script type="text/javascript"> |
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28 |
var n = 10000, // number of trials |
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m = 10, // number of random variables |
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data = []; |
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32 |
// Generate an Irwin-Hall distribution. |
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33 |
for (var i = 0; i < n; i++) { |
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for (var s = 0, j = 0; j < m; j++) { |
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s += Math.random(); |
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36 |
} |
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37 |
data.push(s); |
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38 |
} |
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39 |
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var w = 400, |
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41 |
h = 400; |
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42 |
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43 |
var histogram = d3.layout.histogram() |
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44 |
(data); |
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45 |
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46 |
var x = d3.scale.ordinal() |
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47 |
.domain(histogram.map(function(d) { return d.x; })) |
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48 |
.rangeRoundBands([0, w]); |
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49 |
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50 |
var y = d3.scale.linear() |
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51 |
.domain([0, d3.max(histogram, function(d) { return d.y; })]) |
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.range([0, h]); |
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53 |
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var vis = d3.select("body").append("svg:svg") |
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.attr("width", w) |
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56 |
.attr("height", h) |
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.append("svg:g") |
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.attr("transform", "translate(.5)"); |
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59 |
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vis.selectAll("rect") |
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61 |
.data(histogram) |
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.enter().append("svg:rect") |
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63 |
.attr("transform", function(d) { return "translate(" + x(d.x) + "," + (h - y(d.y)) + ")"; }) |
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.attr("width", x.rangeBand()) |
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.attr("y", function(d) { return y(d.y); }) |
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66 |
.attr("height", 0) |
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67 |
.transition() |
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68 |
.duration(750) |
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69 |
.attr("y", 0) |
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70 |
.attr("height", function(d) { return y(d.y); }); |
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71 |
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72 |
vis.append("svg:line") |
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73 |
.attr("x1", 0) |
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74 |
.attr("x2", w) |
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75 |
.attr("y1", h) |
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76 |
.attr("y2", h); |
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77 |
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78 |
</script> |
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79 |
</body> |
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80 |
</html> |