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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 path, .axis line { |
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25 fill: none; |
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26 stroke: #fff; |
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27 shape-rendering: crispEdges; |
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28 } |
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29 |
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30 </style> |
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31 </head> |
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32 <body> |
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33 <script type="text/javascript"> |
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34 |
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35 var m = [20, 20, 20, 20], |
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36 w = 960 - m[1] - m[3], |
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37 h = 140 - m[0] - m[2], |
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38 parse = d3.time.format("%b %Y").parse; |
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39 |
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40 // Scales. Note the inverted domain for the y-scale: bigger is up! |
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41 var x = d3.time.scale().range([0, w]), |
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42 y = d3.scale.linear().range([h, 0]); |
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43 |
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44 // X-axis. |
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45 var xAxis = d3.svg.axis() |
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46 .scale(x) |
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47 .tickSize(-h); |
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48 |
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49 // An area generator, for the light fill. |
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50 var area = d3.svg.area() |
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51 .interpolate("monotone") |
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52 .x(function(d) { return x(d.date); }) |
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53 .y0(h) |
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54 .y1(function(d) { return y(d.price); }); |
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55 |
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56 // A line generator, for the dark stroke. |
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57 var line = d3.svg.line() |
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58 .interpolate("monotone") |
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59 .x(function(d) { return x(d.date); }) |
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60 .y(function(d) { return y(d.price); }); |
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61 |
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62 d3.csv("../data/stocks.csv", function(data) { |
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63 |
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64 // Nest values by symbol. |
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65 var symbols = d3.nest() |
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66 .key(function(d) { return d.symbol; }) |
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67 .entries(data); |
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68 |
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69 // Parse dates and numbers. We assume values are sorted by date. |
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70 // Also compute the maximum price per symbol, needed for the y-domain. |
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71 symbols.forEach(function(s) { |
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72 s.values.forEach(function(d) { d.date = parse(d.date); d.price = +d.price; }); |
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73 s.maxPrice = d3.max(s.values, function(d) { return d.price; }); |
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74 }); |
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75 |
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76 // Compute the minimum and maximum date across symbols. |
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77 x.domain([ |
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78 d3.min(symbols, function(d) { return d.values[0].date; }), |
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79 d3.max(symbols, function(d) { return d.values[d.values.length - 1].date; }) |
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80 ]); |
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81 |
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82 // Add an SVG element for each symbol, with the desired dimensions and margin. |
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83 var svg = d3.select("body").selectAll("svg") |
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84 .data(symbols) |
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85 .enter().append("svg:svg") |
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86 .attr("width", w + m[1] + m[3]) |
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87 .attr("height", h + m[0] + m[2]) |
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88 .append("svg:g") |
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89 .attr("transform", "translate(" + m[3] + "," + m[0] + ")"); |
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90 |
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91 // Add the area path elements. Note: the y-domain is set per element. |
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92 svg.append("svg:path") |
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93 .attr("class", "area") |
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94 .attr("d", function(d) { y.domain([0, d.maxPrice]); return area(d.values); }); |
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95 |
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96 // Add the x-axis. |
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97 svg.append("svg:g") |
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98 .attr("class", "x axis") |
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99 .attr("transform", "translate(0," + h + ")") |
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100 .call(xAxis); |
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101 |
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102 // Add the line path elements. Note: the y-domain is set per element. |
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103 svg.append("svg:path") |
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104 .attr("class", "line") |
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105 .attr("d", function(d) { y.domain([0, d.maxPrice]); return line(d.values); }); |
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106 |
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107 // Add a small label for the symbol name. |
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108 svg.append("svg:text") |
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109 .attr("x", w - 6) |
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110 .attr("y", h - 6) |
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111 .attr("text-anchor", "end") |
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112 .text(function(d) { return d.key; }); |
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113 }); |
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114 |
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115 </script> |
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116 </body> |
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117 </html> |