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1 <!DOCTYPE html> |
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2 <html> |
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3 <head> |
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4 <script type="text/javascript" src="../../d3.js"></script> |
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5 <script type="text/javascript" src="../../d3.csv.js"></script> |
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6 <script type="text/javascript" src="../../d3.time.js"></script> |
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7 <style type="text/css"> |
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8 |
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9 body { |
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10 font: 10px sans-serif; |
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11 margin: 0; |
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12 } |
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13 |
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14 path.line { |
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15 fill: none; |
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16 stroke: #666; |
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17 stroke-width: 1.5px; |
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18 } |
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19 |
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20 path.area { |
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21 fill: #e7e7e7; |
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22 } |
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23 |
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24 .axis { |
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25 shape-rendering: crispEdges; |
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26 } |
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27 |
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28 .x.axis line { |
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29 stroke: #fff; |
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30 } |
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31 |
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32 .x.axis .minor { |
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33 stroke-opacity: .5; |
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34 } |
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35 |
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36 .x.axis path { |
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37 display: none; |
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38 } |
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39 |
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40 .y.axis line, .y.axis path { |
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41 fill: none; |
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42 stroke: #000; |
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43 } |
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44 |
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45 </style> |
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46 </head> |
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47 <body> |
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48 <script type="text/javascript"> |
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49 |
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50 var m = [20, 40, 20, 20], |
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51 w = 960 - m[1] - m[3], |
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52 h = 140 - m[0] - m[2], |
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53 parse = d3.time.format("%b %Y").parse; |
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54 |
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55 // Scales. Note the inverted domain for the y-scale: bigger is up! |
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56 var x = d3.time.scale().range([0, w]), |
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57 y = d3.scale.linear().range([h, 0]); |
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58 |
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59 // Axes. |
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60 var xAxis = d3.svg.axis().scale(x).tickSize(-h).tickSubdivide(true), |
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61 yAxis = d3.svg.axis().scale(y).ticks(4).orient("right"); |
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62 |
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63 // An area generator, for the light fill. |
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64 var area = d3.svg.area() |
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65 .interpolate("monotone") |
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66 .x(function(d) { return x(d.date); }) |
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67 .y0(h) |
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68 .y1(function(d) { return y(d.price); }); |
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69 |
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70 // A line generator, for the dark stroke. |
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71 var line = d3.svg.line() |
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72 .interpolate("monotone") |
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73 .x(function(d) { return x(d.date); }) |
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74 .y(function(d) { return y(d.price); }); |
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75 |
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76 d3.csv("../data/stocks.csv", function(data) { |
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77 |
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78 // Filter to one symbol; the S&P 500. |
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79 var values = data.filter(function(d) { |
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80 return d.symbol == "S&P 500"; |
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81 }); |
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82 |
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83 // Parse dates and numbers. We assume values are sorted by date. |
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84 values.forEach(function(d) { |
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85 d.date = parse(d.date); |
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86 d.price = +d.price; |
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87 }); |
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88 |
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89 // Compute the minimum and maximum date, and the maximum price. |
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90 x.domain([values[0].date, values[values.length - 1].date]); |
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91 y.domain([0, d3.max(values, function(d) { return d.price; })]); |
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92 |
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93 // Add an SVG element with the desired dimensions and margin. |
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94 var svg = d3.select("body").append("svg:svg") |
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95 .attr("width", w + m[1] + m[3]) |
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96 .attr("height", h + m[0] + m[2]) |
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97 .append("svg:g") |
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98 .attr("transform", "translate(" + m[3] + "," + m[0] + ")"); |
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99 |
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100 // Add the clip path. |
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101 svg.append("svg:clipPath") |
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102 .attr("id", "clip") |
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103 .append("svg:rect") |
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104 .attr("width", w) |
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105 .attr("height", h); |
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106 |
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107 // Add the area path. |
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108 svg.append("svg:path") |
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109 .attr("class", "area") |
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110 .attr("clip-path", "url(#clip)") |
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111 .attr("d", area(values)); |
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112 |
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113 // Add the x-axis. |
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114 svg.append("svg:g") |
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115 .attr("class", "x axis") |
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116 .attr("transform", "translate(0," + h + ")") |
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117 .call(xAxis); |
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118 |
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119 // Add the y-axis. |
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120 svg.append("svg:g") |
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121 .attr("class", "y axis") |
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122 .attr("transform", "translate(" + w + ",0)") |
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123 .call(yAxis); |
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124 |
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125 // Add the line path. |
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126 svg.append("svg:path") |
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127 .attr("class", "line") |
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128 .attr("clip-path", "url(#clip)") |
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129 .attr("d", line(values)); |
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130 |
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131 // Add a small label for the symbol name. |
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132 svg.append("svg:text") |
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133 .attr("x", w - 6) |
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134 .attr("y", h - 6) |
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135 .attr("text-anchor", "end") |
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136 .text(values[0].symbol); |
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137 |
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138 // On click, update the x-axis. |
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139 svg.on("click", function() { |
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140 var n = values.length - 1, |
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141 i = Math.floor(Math.random() * n / 2), |
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142 j = i + Math.floor(Math.random() * n / 2) + 1; |
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143 x.domain([values[i].date, values[j].date]); |
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144 var t = svg.transition().duration(750); |
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145 t.select(".x.axis").call(xAxis); |
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146 t.select(".area").attr("d", area(values)); |
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147 t.select(".line").attr("d", line(values)); |
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148 }); |
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149 }); |
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150 |
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151 </script> |
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152 </body> |
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153 </html> |