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| | 5 | <title>Independent Series</title> |
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| | 33 | <body> |
| | 34 | <h3>Independent Series</h3> |
| | 35 | <p>By using the connectSeparated attribute, it's possible to display a chart of several time series with completely independent x-values.</p> |
| | 36 | |
| | 37 | <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> |
| | 38 | |
| | 39 | <div id="graph" style="float: right; margin-right: 50px; width: 400px; height: 300px;"></div> |
| | 40 | <p>For example, say you had two series:</p> |
| | 41 | <table><tr> |
| | 42 | <td valign=top> |
| | 43 | <table> |
| | 44 | <table class=thinborder> |
| | 45 | <tr><th>x</th><th>A</th></tr> |
| | 46 | <tr><td>2</td><td>2</td></tr> |
| | 47 | <tr><td>4</td><td>6</td></tr> |
| | 48 | <tr><td>6</td><td>4</td></tr> |
| | 49 | </table> |
| | 50 | </td> |
| | 51 | <td valign=top style="padding-left:25px;"> |
| | 52 | <table class=thinborder> |
| | 53 | <tr><th>x</th><th>B</th></tr> |
| | 54 | <tr><td>1</td><td>3</td></tr> |
| | 55 | <tr><td>3</td><td>7</td></tr> |
| | 56 | <tr><td>5</td><td>5</td></tr> |
| | 57 | </table> |
| | 58 | </td> |
| | 59 | </tr></table> |
| | 60 | |
| | 61 | <p>Then you would specify the following CSV or native data:</p> |
| | 62 | <table><tr> |
| | 63 | <td valign=top> |
| | 64 | (CSV) |
| | 65 | <pre>X,A,B |
| | 66 | 1,,3 |
| | 67 | 2,2, |
| | 68 | 3,,7 |
| | 69 | 4,6, |
| | 70 | 5,,5 |
| | 71 | 6,4,</pre> |
| | 72 | </td> |
| | 73 | <td valign=top style="padding-left: 25px;"> |
| | 74 | (native) |
| | 75 | <pre>[ |
| | 76 | [1, null, 3], |
| | 77 | [2, 2, null], |
| | 78 | [3, null, 7], |
| | 79 | [4, 6, null], |
| | 80 | [5, null, 5], |
| | 81 | [6, 4, null] ]</pre> |
| | 82 | </td> |
| | 83 | </tr></table> |
| | 84 | |
| | 85 | <script type="text/javascript"> |
| | 86 | var g1 = new Dygraph( |
| | 87 | document.getElementById("graph"), |
| | 88 | [ |
| | 89 | [1, null, 3], |
| | 90 | [2, 2, null], |
| | 91 | [3, null, 7], |
| | 92 | [4, 5, null], |
| | 93 | [5, null, 5], |
| | 94 | [6, 3, null] |
| | 95 | ], |
| | 96 | { |
| | 97 | labels: ["x", "A", "B" ], |
| | 98 | connectSeparatedPoints: true, |
| | 99 | drawPoints: true |
| | 100 | } |
| | 101 | ); |
| | 102 | </script> |
| | 103 | |
| | 104 | <h3>Encoding a gap</h3> |
| | 105 | <p>There's one extra wrinkle. What if one of the series has a missing |
| | 106 | value, i.e. what if your series are something like </p> |
| | 107 | |
| | 108 | <table><tr> |
| | 109 | <td valign=top> |
| | 110 | <table> |
| | 111 | <table class=thinborder> |
| | 112 | <tr><th>x</th><th>A</th></tr> |
| | 113 | <tr><td>2</td><td>2</td></tr> |
| | 114 | <tr><td>4</td><td>4</td></tr> |
| | 115 | <tr><td>6</td><td>(gap)</td></tr> |
| | 116 | <tr><td>8</td><td>8</td></tr> |
| | 117 | <tr><td>10</td><td>10</td></tr> |
| | 118 | </table> |
| | 119 | </td> |
| | 120 | <td valign=top style="padding-left:25px;"> |
| | 121 | <table class=thinborder> |
| | 122 | <tr><th>x</th><th>B</th></tr> |
| | 123 | <tr><td>1</td><td>3</td></tr> |
| | 124 | <tr><td>3</td><td>5</td></tr> |
| | 125 | <tr><td>5</td><td>7</td></tr> |
| | 126 | </table> |
| | 127 | </td> |
| | 128 | </tr></table> |
| | 129 | |
| | 130 | <div id="graph2" style="float: right; margin-right: 50px; width: 400px; height: 300px;"></div> |
| | 131 | <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> |
| | 132 | |
| | 133 | <script type="text/javascript"> |
| | 134 | g2 = new Dygraph( |
| | 135 | document.getElementById("graph2"), |
| | 136 | "x,A,B \n" + |
| | 137 | "1,,3 \n" + |
| | 138 | "2,2, \n" + |
| | 139 | "3,,5 \n" + |
| | 140 | "4,4, \n" + |
| | 141 | "5,,7 \n" + |
| | 142 | "6,NaN, \n" + |
| | 143 | "8,8, \n" + |
| | 144 | "10,10, \n" |
| | 145 | , { |
| | 146 | connectSeparatedPoints: true, |
| | 147 | drawPoints: true |
| | 148 | } |
| | 149 | ); |
| | 150 | </script> |
| | 151 | |
| | 152 | <table><tr> |
| | 153 | <td valign=top> |
| | 154 | (CSV) |
| | 155 | <pre>x,A,B |
| | 156 | 1,,3 |
| | 157 | 2,2, |
| | 158 | 3,,5 |
| | 159 | 4,4, |
| | 160 | 5,,7 |
| | 161 | 6,NaN, |
| | 162 | 8,8, |
| | 163 | 10,10,</pre> |
| | 164 | </td> |
| | 165 | <td valign=top style="padding-left: 25px;"> |
| | 166 | (native) |
| | 167 | <pre>[ [1, null, 3], |
| | 168 | [2, 2, null], |
| | 169 | [3, null, 5], |
| | 170 | [4, 4, null], |
| | 171 | [5, null, 7], |
| | 172 | [6, NaN, null], |
| | 173 | [8, 8, null], |
| | 174 | [10, 10, null] ]</pre> |
| | 175 | </td> |
| | 176 | </tr></table> |
| | 177 | |
| | 178 | </body> |
| | 179 | </html> |
projects / dygraphs.git / blame_incremental