projects / dygraphs.git / blame
| Commit | Line | Data |
|---|---|---|
| 75c589da DV |
1 | <html> |
| 2 | <head> | |
| 3 | <title>Independent Series</title> | |
| 4 | <!--[if IE]> | |
| 5 | <script type="text/javascript" src="../excanvas.js"></script> | |
| 6 | <![endif]--> | |
| 7 | <script type="text/javascript" src="../strftime/strftime-min.js"></script> | |
| 8 | <script type="text/javascript" src="../rgbcolor/rgbcolor.js"></script> | |
| 9 | <script type="text/javascript" src="../dygraph-canvas.js"></script> | |
| 10 | <script type="text/javascript" src="../dygraph.js"></script> | |
| 11 | <style type="text/css"> | |
| 12 | .thinborder { | |
| 13 | border-width: 1px; | |
| 14 | border-spacing: 0px; | |
| 15 | border-style: solid; | |
| 16 | border-color: black; | |
| 17 | border-collapse: collapse; | |
| 18 | } | |
| 19 | ||
| 20 | .thinborder td, | |
| 21 | .thinborder th { | |
| 22 | border-width: 1px; | |
| 23 | padding: 5px; | |
| 24 | border-style: solid; | |
| 25 | border-color: black; | |
| 26 | } | |
| 27 | </style> | |
| 28 | </head> | |
| 29 | <body> | |
| 30 | <p>By using the connectSeparated attribute, it's possible to display a chart of several time series with completely independent x-values.</p> | |
| 31 | ||
| 32 | <p>The trick is to specify values for the series at the union of the x-values of all series. For one series' x values, specify <code>null</code> for each of the other series.</p> | |
| 33 | ||
| c6a0ebba | 34 | <div id="graph" style="float: right; margin-right: 50px; width: 400px; height: 300px;"></div> |
| 75c589da DV |
35 | <p>For example, say you had two series:</p> |
| 36 | <table><tr> | |
| 37 | <td valign=top> | |
| 38 | <table> | |
| 39 | <table class=thinborder> | |
| 40 | <tr><th>x</th><th>A</th></tr> | |
| 41 | <tr><td>2</td><td>2</td></tr> | |
| c6a0ebba DV |
42 | <tr><td>4</td><td>6</td></tr> |
| 43 | <tr><td>6</td><td>4</td></tr> | |
| 75c589da DV |
44 | </table> |
| 45 | </td> | |
| 46 | <td valign=top style="padding-left:25px;"> | |
| 47 | <table class=thinborder> | |
| 48 | <tr><th>x</th><th>B</th></tr> | |
| 49 | <tr><td>1</td><td>3</td></tr> | |
| c6a0ebba DV |
50 | <tr><td>3</td><td>7</td></tr> |
| 51 | <tr><td>5</td><td>5</td></tr> | |
| 75c589da DV |
52 | </table> |
| 53 | </td> | |
| 54 | </tr></table> | |
| 55 | ||
| 56 | <p>Then you would specify the following CSV or native data:</p> | |
| 57 | <table><tr> | |
| 58 | <td valign=top> | |
| 59 | (CSV) | |
| 60 | <pre>X,A,B | |
| 61 | 1,,3 | |
| 62 | 2,2, | |
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63 | 3,,7 |
| 64 | 4,6, | |
| 65 | 5,,5 | |
| 66 | 6,4,</pre> | |
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67 | </td> |
| 68 | <td valign=top style="padding-left: 25px;"> | |
| 69 | (native) | |
| 70 | <pre>[ | |
| 71 | [1, null, 3], | |
| 72 | [2, 2, null], | |
| c6a0ebba DV |
73 | [3, null, 7], |
| 74 | [4, 6, null], | |
| 75 | [5, null, 5], | |
| 76 | [6, 4, null] ]</pre> | |
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77 | </td> |
| 78 | </tr></table> | |
| 79 | ||
| 80 | <script type="text/javascript"> | |
| 81 | new Dygraph( | |
| 82 | document.getElementById("graph"), | |
| 83 | [ | |
| 84 | [1, null, 3], | |
| 85 | [2, 2, null], | |
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86 | [3, null, 7], |
| 87 | [4, 5, null], | |
| 88 | [5, null, 5], | |
| 89 | [6, 3, null] | |
| 75c589da DV |
90 | ], |
| 91 | { | |
| 92 | labels: ["x", "A", "B" ], | |
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93 | connectSeparatedPoints: true, |
| 94 | drawPoints: true | |
| 75c589da DV |
95 | } |
| 96 | ); | |
| 97 | </script> | |
| 98 | ||
| c6a0ebba DV |
99 | <h3>Encoding a gap</h3> |
| 100 | <p>There's one extra wrinkle. What if one of the series has a missing | |
| 101 | value, i.e. what if your series are something like </p> | |
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102 | |
| 103 | <table><tr> | |
| 104 | <td valign=top> | |
| 105 | <table> | |
| 106 | <table class=thinborder> | |
| 107 | <tr><th>x</th><th>A</th></tr> | |
| 108 | <tr><td>2</td><td>2</td></tr> | |
| 109 | <tr><td>4</td><td>4</td></tr> | |
| 110 | <tr><td>6</td><td>(gap)</td></tr> | |
| 111 | <tr><td>8</td><td>8</td></tr> | |
| 112 | <tr><td>10</td><td>10</td></tr> | |
| 113 | </table> | |
| 114 | </td> | |
| 115 | <td valign=top style="padding-left:25px;"> | |
| 116 | <table class=thinborder> | |
| 117 | <tr><th>x</th><th>B</th></tr> | |
| 118 | <tr><td>1</td><td>3</td></tr> | |
| 119 | <tr><td>3</td><td>5</td></tr> | |
| 120 | <tr><td>5</td><td>7</td></tr> | |
| 121 | </table> | |
| 122 | </td> | |
| 123 | </tr></table> | |
| 124 | ||
| c6a0ebba | 125 | <div id="graph2" style="float: right; margin-right: 50px; width: 400px; height: 300px;"></div> |
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126 | <p>The gap would normally be encoded as a null, or missing value. But when you use <code>connectSeparatedPoints</code>, that has a special meaning. Instead, you have to use <code>NaN</code>. This is a bit of a hack, but it gets the job done.</p> |
| 127 | ||
| 128 | <script type="text/javascript"> | |
| 876cc77c | 129 | g2 = new Dygraph( |
| 75c589da | 130 | document.getElementById("graph2"), |
| c6a0ebba DV |
131 | "x,A,B \n" + |
| 132 | "1,,3 \n" + | |
| 133 | "2,2, \n" + | |
| 134 | "3,,5 \n" + | |
| 135 | "4,4, \n" + | |
| 136 | "5,,7 \n" + | |
| 137 | "6,NaN, \n" + | |
| 138 | "8,8, \n" + | |
| 139 | "10,10, \n" | |
| 140 | , { | |
| 75c589da | 141 | labels: ["x", "A", "B" ], |
| c6a0ebba DV |
142 | connectSeparatedPoints: true, |
| 143 | drawPoints: true | |
| 75c589da DV |
144 | } |
| 145 | ); | |
| 146 | </script> | |
| 147 | ||
| c6a0ebba DV |
148 | <table><tr> |
| 149 | <td valign=top> | |
| 150 | (CSV) | |
| 151 | <pre>x,A,B | |
| 152 | 1,,3 | |
| 153 | 2,2, | |
| 154 | 3,,5 | |
| 155 | 4,4, | |
| 156 | 5,,7 | |
| 157 | 6,NaN, | |
| 158 | 8,8, | |
| 159 | 10,10,</pre> | |
| 160 | </td> | |
| 161 | <td valign=top style="padding-left: 25px;"> | |
| 162 | (native) | |
| 163 | <pre>[ [1, null, 3], | |
| 164 | [2, 2, null], | |
| 165 | [3, null, 5], | |
| 166 | [4, 4, null], | |
| 167 | [5, null, 7], | |
| 168 | [6, NaN, null], | |
| 169 | [8, 8, null], | |
| 170 | [10, 10, null] ]</pre> | |
| 171 | </td> | |
| 172 | </tr></table> | |
| 173 | ||
| 75c589da DV |
174 | </body> |
| 175 | </html> |