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1 var n = 4, // number of layers |
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2 m = 64, // number of samples per layer |
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3 data = d3.layout.stack()(stream_layers(n, m, .1)), |
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4 color = d3.interpolateRgb("#aad", "#556"); |
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5 |
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6 var p = 20, |
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7 w = 960, |
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8 h = 500 - .5 - p, |
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9 mx = m, |
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10 my = d3.max(data, function(d) { |
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11 return d3.max(d, function(d) { |
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12 return d.y0 + d.y; |
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13 }); |
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14 }), |
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15 mz = d3.max(data, function(d) { |
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16 return d3.max(d, function(d) { |
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17 return d.y; |
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18 }); |
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19 }), |
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20 x = function(d) { return d.x * w / mx; }, |
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21 y0 = function(d) { return h - d.y0 * h / my; }, |
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22 y1 = function(d) { return h - (d.y + d.y0) * h / my; }, |
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23 y2 = function(d) { return d.y * h / mz; }; // or `my` to not rescale |
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24 |
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25 var vis = d3.select("#chart") |
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26 .append("svg:svg") |
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27 .attr("width", w) |
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28 .attr("height", h + p); |
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29 |
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30 var layers = vis.selectAll("g.layer") |
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31 .data(data) |
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32 .enter().append("svg:g") |
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33 .style("fill", function(d, i) { return color(i / (n - 1)); }) |
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34 .attr("class", "layer"); |
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35 |
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36 var bars = layers.selectAll("g.bar") |
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37 .data(function(d) { return d; }) |
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38 .enter().append("svg:g") |
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39 .attr("class", "bar") |
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40 .attr("transform", function(d) { return "translate(" + x(d) + ",0)"; }); |
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41 |
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42 bars.append("svg:rect") |
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43 .attr("width", x({x: .9})) |
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44 .attr("x", 0) |
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45 .attr("y", h) |
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46 .attr("height", 0) |
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47 .transition() |
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48 .delay(function(d, i) { return i * 10; }) |
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49 .attr("y", y1) |
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50 .attr("height", function(d) { return y0(d) - y1(d); }); |
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51 |
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52 var labels = vis.selectAll("text.label") |
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53 .data(data[0]) |
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54 .enter().append("svg:text") |
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55 .attr("class", "label") |
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56 .attr("x", x) |
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57 .attr("y", h + 6) |
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58 .attr("dx", x({x: .45})) |
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59 .attr("dy", ".71em") |
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60 .attr("text-anchor", "middle") |
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61 .text(function(d, i) { return i; }); |
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62 |
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63 vis.append("svg:line") |
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64 .attr("x1", 0) |
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65 .attr("x2", w - x({x: .1})) |
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66 .attr("y1", h) |
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67 .attr("y2", h); |
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68 |
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69 function transitionGroup() { |
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70 var group = d3.selectAll("#chart"); |
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71 |
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72 group.select("#group") |
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73 .attr("class", "first active"); |
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74 |
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75 group.select("#stack") |
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76 .attr("class", "last"); |
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77 |
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78 group.selectAll("g.layer rect") |
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79 .transition() |
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80 .duration(500) |
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81 .delay(function(d, i) { return (i % m) * 10; }) |
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82 .attr("x", function(d, i) { return x({x: .9 * ~~(i / m) / n}); }) |
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83 .attr("width", x({x: .9 / n})) |
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84 .each("end", transitionEnd); |
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85 |
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86 function transitionEnd() { |
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87 d3.select(this) |
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88 .transition() |
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89 .duration(500) |
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90 .attr("y", function(d) { return h - y2(d); }) |
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91 .attr("height", y2); |
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92 } |
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93 } |
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94 |
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95 function transitionStack() { |
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96 var stack = d3.select("#chart"); |
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97 |
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98 stack.select("#group") |
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99 .attr("class", "first"); |
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100 |
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101 stack.select("#stack") |
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102 .attr("class", "last active"); |
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103 |
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104 stack.selectAll("g.layer rect") |
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105 .transition() |
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106 .duration(500) |
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107 .delay(function(d, i) { return (i % m) * 10; }) |
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108 .attr("y", y1) |
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109 .attr("height", function(d) { return y0(d) - y1(d); }) |
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110 .each("end", transitionEnd); |
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111 |
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112 function transitionEnd() { |
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113 d3.select(this) |
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114 .transition() |
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115 .duration(500) |
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116 .attr("x", 0) |
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117 .attr("width", x({x: .9})); |
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118 } |
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119 } |