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1<!DOCTYPE html>
2<html>
3 <head>
4 <title>dygraphs JavaScript Visualization Library</title>
5 <!--[if IE]>
6 <script type="text/javascript" src="excanvas.js"></script>
7 <![endif]-->
8 <script type="text/javascript" src="dygraph-combined.js"></script>
9 <link rel="stylesheet" href="style.css">
10 </head>
11 <body>
12 <div id="nav">
13 <h2>Documentation</h2>
14 <ul>
15 <li><a href="#demo">Demo</a></li>
16 <li><a href="#usage">Usage</a></li>
17 <li><a href="#ie">IE Compatibility</a></li>
18 <li><a href="#gviz">GViz Data</a></li>
19 <li><a href="#baseball">Baseball chart</a></li>
20 <li><a href="#stock">Stock chart</a></li>
21 <li><a href="#options">Options Reference</a></li>
22 <li><a href="#policy">Data Policy</a></li>
23 </ul>
24
25 <h2>Project</h2>
26 <ul>
27 <li><a href="http://github.com/danvk/dygraphs">Source</a></li>
28 <li><a href="http://code.google.com/p/dygraphs/issues/">Issues</a></li>
29 <li><a href="http://code.google.com/p/dygraphs/issues/entry">Report Bug</a></li>
30 <li><a href="mailto:dygraphs-users [at] googlegroups.com">Contact</a></li>
31 </ul>
32
33 <h2>Gallery</h2>
34 <ul>
35 <li><a href="tests/demo.html">Basic Demo</a></li>
36 <li><a href="tests/gviz.html">GViz Demo</a></li>
37 <li><a href="tests/plotter.html">Equation Plotter</a></li>
38 <li><a href="tests/perf.html">Performance Test</a></li>
39 <li><a href="tests/fillGraph.html">Filled Chart</a></li>
40 <li><a href="tests/perf.html">Fractions</a></li>
41 <li><a href="tests/visibility.html">Visibility</a></li>
42 <li><a href="tests/label-div.html">Labels in a DIV</a></li>
43 <li><a href="tests/numeric-axis.html">Numeric Axis</a></li>
44 <li><a href="tests/draw-points.html">Dotted Points</a></li>
45 <li><a href="tests/native-format.html">Native Format</a></li>
46 <li><a href="tests/grid_dot.html">Crazy Styles</a></li>
47 <li><a href="tests/spacing.html">Tick spacing</a></li>
48 <li><a href="tests/callback.html">Callbacks</a></li>
49 <li><a href="tests/crosshair.html">Crosshairs</a></li>
50 <li><a href="tests/hourly.html">Hourly/Minutely data</a></li>
51 <li><a href="tests/isolated-points.html">Isolated Points</a></li>
52 <li><a href="tests/missing-data.html">Missing Data</a></li>
53 <li><a href="tests/border.html">Bordered chart</a></li>
54 <li><a href="tests/custom-bars.html">Custom Bars</a></li>
55 <li><a href="tests/customLabel.html">Custom Label Styles</a></li>
56 <li><a href="tests/dygraph.html">Minimal Example</a></li>
57 <li><a href="tests/negative.html">Negative Numbers</a></li>
58 <li><a href="tests/noise.html">Noisy Data</a></li>
59 <li><a href="tests/two-series.html">Multiple Series</a></li>
60 <li><a href="tests/underlay-callback.html">Custom Underlay / background</a></li>
61 </ul>
62 </div>
63
64 <div id="content">
65 <h1>dygraphs JavaScript Visualization Library</h1>
66
67 <p><a href="http://github.com/danvk/dygraphs">http://github.com/danvk/dygraphs</a></p>
68 <p>See <a href="http://groups.google.com/group/dygraphs-users">mailing list</a>, <a href="http://github.com/danvk/dygraphs/downloads/">downloads</a>, <a href="tests/">gallery</a> and <a href="http://code.google.com/p/dygraphs/issues/">open issues</a></p>
69
70 <p>dygraphs is an open source JavaScript library that produces produces interactive, zoomable charts of time series. It is designed to display dense data sets and enable users to explore and interpret them.</p>
71
72 <h3 id="demo">A demo is worth a thousand words:</h3>
73
74 <p style="font-size:0.8em">(Mouse over to highlight individual values. Click and drag to zoom. Double-click to zoom back out. Change the number and hit enter to adjust the averaging period.)</p>
75
76 <div id="title" style="width:800px; margin: 1em;text-align:center; font-weight: bold; font-size: 125%;">Temperatures in New York vs. San Francisco</div>
77
78 <div id="demodiv" style="width:800px; height:320px;"></div>
79 <script type="text/javascript">
80 g = new Dygraph(
81 document.getElementById("demodiv"),
82 "ny-vs-sf.txt",
83 {
84 rollPeriod: 14,
85 showRoller: true,
86 customBars: true,
87 yAxisLabelWidth: 30
88 }
89 );
90 </script>
91
92 <h4>Some things to notice:</h4>
93 <ul>
94 <li>There's less seasonal temperature variation in SF than in NY.</li>
95 <li>The difference is about 15&deg; F for SF vs. 50&deg; F for NY.</li>
96 <li>The daily data (set rolling period to 1) is quite noisy and hides this conclusion.</li>
97 <li>Using a 14-day moving average makes it clearer. A 100-day rolling period averages out nearly all the specifics from the data.</li>
98 <li>There's a gap in the data for SF, when the weather station was down (zoom into October 2007 to see it).</li>
99 <li>The bands around each point indicate average highs and lows.</li>
100 <li>There is a <em>lot</em> of data in this chart: low, average and high for each city on each day of a three year period &asymp; 6000 data points in all.</li>
101 </ul>
102
103 <p>dygraphs allows the user to explore the data and discover these facts.</p>
104
105 <p>For more demos, browse the dygraph <a href="tests/">tests</a> directory.</p>
106
107 <h3>Features</h3>
108 <p>Some of the features of dygraphs:</p>
109 <ul>
110 <li>Plots time series without using an external server or Flash</li>
111 <li>Works in Internet Explorer (using excanvas)</li>
112 <li>Lightweight (45kb) and responsive</li>
113 <li>Displays values on mouseover (this makes it easily discoverable)</li>
114 <li>Supports error bands around data series</li>
115 <li>Interactive zoom</li>
116 <li>Adjustable averaging period</li>
117 <li>Can intelligently chart fractions</li>
118 <li>Customizable click-through actions</li>
119 <li>Compatible with the Google Visualization API</li>
120 <li>Intelligent defaults make it easy to use</li>
121 </ul>
122
123 <h2 id="usage">Usage</h2>
124
125 <p>To use dygraphs, include the <code><a href="http://github.com/danvk/dygraphs/downloads/">dygraph-combined.js</a></code> JavaScript file and instantiate a <code>Dygraph</code> object.</p>
126
127 <p>Here's a basic example to get things started:</p>
128
129 <div class="example" style="clear:both;">
130 <div class="codeblock" style="float:left;width:400px;">
131 <h3 style="text-align:center">HTML</h3>
132 <code>
133 <pre>
134&lt;html&gt;
135&lt;head&gt;
136&lt;script type=&quot;text/javascript&quot;
137 src=&quot;dygraph-combined.js&quot;&gt;&lt;/script&gt;
138&lt;/head&gt;
139&lt;body&gt;
140&lt;div id=&quot;graphdiv&quot;&gt;&lt;/div&gt;
141&lt;script type=&quot;text/javascript&quot;&gt;
142 g = new Dygraph(
143
144 // containing div
145 document.getElementById(&quot;graphdiv&quot;),
146
147 // CSV or path to a CSV file.
148 &quot;Date,Temperature\n&quot; +
149 &quot;2008-05-07,75\n&quot; +
150 &quot;2008-05-08,70\n&quot; +
151 &quot;2008-05-09,80\n&quot;
152
153 );
154&lt;/script&gt;
155&lt;/body&gt;
156&lt;/html&gt;
157</pre>
158 </code>
159 </div>
160 <div class="codeoutput" style="float:left;">
161 <h3 style="text-align:center">OUTPUT</h3>
162 <div id="graphdiv"></div>
163 <script type="text/javascript">
164 g = new Dygraph(
165
166 // containing div
167 document.getElementById("graphdiv"),
168
169 // CSV or path to a CSV file.
170 "Date,Temperature\n" +
171 "2008-05-07,75\n" +
172 "2008-05-08,70\n" +
173 "2008-05-09,80\n"
174 );
175 </script>
176 </div>
177 </div>
178
179 <p style="clear:both">In order to keep this example self-contained, the second parameter is raw CSV data. The dygraphs library parses this data (including column headers), resizes its container to a reasonable default, calculates appropriate axis ranges and tick marks and draws the graph.</p>
180
181 <p>In most applications, it makes more sense to include a CSV file instead. If the second parameter to the constructor doesn't contain a newline, it will be interpreted as the path to a CSV file. The Dygraph will perform an XMLHttpRequest to retrieve this file and display the data when it becomes available. Make sure your CSV file is readable and serving from a place that understands XMLHttpRequest's! In particular, you cannot specify a CSV file using <code>"file:///"</code>. Here's an example: (data from <a href="http://www.wunderground.com/history/airport/KNUQ/2007/1/1/CustomHistory.html?dayend=31&amp;monthend=12&amp;yearend=2007&amp;req_city=NA&amp;req_state=NA&amp;req_statename=NA">Weather Underground</a>)</p>
182
183 <div class="example" style="clear:both;">
184 <div class="codeblock" style="float:left;width:400px;">
185 <h3 style="text-align:center">HTML</h3>
186 <code>
187<pre>
188&lt;html&gt;
189&lt;head&gt;
190&lt;script type=&quot;text/javascript&quot;
191 src=&quot;dygraph-combined.js&quot;&gt;&lt;/script&gt;
192&lt;/head&gt;
193&lt;body&gt;
194&lt;div id=&quot;graphdiv2&quot;
195 style=&quot;width:500px; height:300px;&quot;&gt;&lt;/div&gt;
196&lt;script type=&quot;text/javascript&quot;&gt;
197 g2 = new Dygraph(
198 document.getElementById(&quot;graphdiv2&quot;),
199 &quot;temperatures.csv&quot;, // path to CSV file
200 {} // options
201 );
202&lt;/script&gt;
203&lt;/body&gt;
204&lt;/html&gt;
205</pre>
206 </code>
207 </div>
208 <div class="codeoutput" style="float:left;">
209 <h3 style="text-align:center">OUTPUT</h3>
210 <div id="graphdiv2" style="width:500px; height:300px;"></div>
211 <script type="text/javascript">
212 g2 = new Dygraph(
213 document.getElementById("graphdiv2"),
214 "temperatures.csv",
215 {}
216 );
217 </script>
218 </div>
219 </div>
220
221 <p style="clear:both;">The file used is <code><a href="temperatures.csv">temperatures.csv</a></code>.</p>
222
223 <p>There are a few things to note here:</p>
224
225 <ul>
226 <li>The Dygraph sent off an XHR to get the temperatures.csv file.</li>
227 <li>The labels were taken from the first line of <code>temperatures.csv</code>, which is <code>Date,High,Low</code>.</li>
228 <li>The Dygraph automatically chose two different, easily-distinguishable colors for the two data series.</li>
229 <li>The labels on the x-axis have switched from days to months. If you zoom in, they'll switch to weeks and then days.</li>
230 <li>Some heuristics are used to determine a good vertical range for the data. The idea is to make all the data visible and have human-friendly values on the axis (i.e. 200 instead of 193.4). Generally this works well.</li>
231 <li>The data is very spiky. A moving average would be easier to interpret.</li>
232 </ul>
233
234 <p>This problem can be fixed by specifying the appropriate options in the "additional options" parameter to the Dygraph constructor. To set the number of days for a moving average, use the <code>rollPeriod</code> option. Here's how it's done:</p>
235
236 <div class="example" style="clear:both;">
237 <div class="codeblock" style="float:left;width:400px;">
238 <h3 style="text-align:center">HTML</h3>
239 <code>
240<pre>
241&lt;html&gt;
242&lt;head&gt;
243&lt;script type=&quot;text/javascript&quot;
244 src=&quot;dygraph-combined.js&quot;&gt;&lt;/script&gt;
245&lt;/head&gt;
246&lt;body&gt;
247&lt;div id=&quot;graphdiv3&quot;
248 style=&quot;width:500px; height:300px;&quot;&gt;&lt;/div&gt;
249&lt;script type=&quot;text/javascript&quot;&gt;
250 g3 = new Dygraph(
251 document.getElementById(&quot;graphdiv3&quot;),
252 &quot;temperatures.csv&quot;,
253 {
254 rollPeriod: 7,
255 showRoller: true
256 }
257 );
258&lt;/script&gt;
259&lt;/body&gt;
260&lt;/html&gt;
261</pre>
262 </code>
263 </div>
264 <div class="codeoutput" style="float:left;">
265 <h3 style="text-align:center">OUTPUT</h3>
266 <div id="graphdiv3" style="width:500px; height:300px;"></div>
267 <script type="text/javascript">
268 g3 = new Dygraph(
269 document.getElementById("graphdiv3"),
270 "temperatures.csv",
271 {
272 rollPeriod: 7,
273 showRoller: true
274 }
275 );
276 </script>
277 </div>
278 </div>
279
280 <p style="clear:both;">A rolling average can be set using the text box in the lower left-hand corner of the graph (the showRoller attribute is what makes this appear). Also note that we've explicitly set the size of the chart div.</p>
281
282 <h2>Error Bars</h2>
283
284 <p>Another significant feature of the dygraphs library is the ability to display error bars around data series. One standard deviation must be specified for each data point. A <em>&plusmn;n</em> sigma band will be drawn around the data series at that point. If a moving average is being displayed, dygraphs will compute the standard deviation of the average at each point. I.E. <em>&sigma; = sqrt( (&sigma;<sub>1<sup>2</sup></sub> + &sigma;<sub>2<sup>2</sup></sub> + ... + &sigma;<sub>n<sup>2</sup></sub>) / n )</em></p>
285
286 <p>Here's a demonstration. There are two data series. One is <code>N(100,10)</code> with a standard deviation of 10 specified at each point. The other is <code>N(80,20)</code> with a standard deviation of 20 specified at each point. The CSV file was generated using Octave and can be viewed at <a href="twonormals.csv">twonormals.csv</a>.</p>
287
288 <div class="example" style="clear:both;">
289 <div class="codeblock" style="float:left;width:400px;">
290 <h3 style="text-align:center">HTML</h3>
291 <code>
292<pre>
293&lt;html&gt;
294&lt;head&gt;
295&lt;script type=&quot;text/javascript&quot;
296 src=&quot;combined.js&quot;&gt;&lt;/script&gt;
297&lt;/head&gt;
298&lt;body&gt;
299&lt;div id=&quot;graphdiv4&quot;
300 style=&quot;width:600px; height:300px;&quot;&gt;&lt;/div&gt;
301&lt;script type=&quot;text/javascript&quot;&gt;
302 g4 = new Dygraph(
303 document.getElementById(&quot;graphdiv4&quot;),
304 &quot;twonormals.csv&quot;,
305 {
306 rollPeriod: 7,
307 showRoller: true,
308 errorBars: true,
309 valueRange: [50,125]
310 }
311 );
312&lt;/script&gt;
313&lt;/body&gt;
314&lt;/html&gt;
315</pre>
316 </code>
317 </div>
318 <div class="codeoutput" style="float:left;">
319 <h3 style="text-align:center">OUTPUT</h3>
320 <div id="graphdiv4" style="width:600px; height:300px;"></div>
321 <script type="text/javascript">
322 g4 = new Dygraph(
323 document.getElementById("graphdiv4"),
324 "twonormals.csv",
325 {
326 rollPeriod: 7,
327 showRoller: true,
328 errorBars: true,
329 valueRange: [50,125]
330 }
331 );
332 </script>
333 </div>
334 </div>
335
336 <p style="clear:both;">Things to note here:</p>
337
338 <ul>
339 <li>The <strong>errorBars</strong> option affects both the interpretation of the CSV file and the display of the graph. When <strong>errorBars</strong> is set to true, each line is interpreted as <em>YYYYMMDD</em>, <em>A</em>, <em>sigma_A</em>, <em>B</em>, <em>sigma_B</em>, &hellip;</li>
340 <li>The first line of the CSV file doesn't mention the error columns. In this case, it's just "Date,Series1,Series2".</li>
341 <li>The averaging visibly affects the error bars. This is most clear if you crank up the rolling period to something like 100 days. For the earliest dates, there won't be 100 data points to average so the signal will be noisier. The error bars get smaller like sqrt(N) going forward in time until there's a full 100 points to average.</li>
342 <li>The error bars are partially transparent. This can be seen when they overlap one another.</li>
343 </ul>
344
345 <h2 id="ie">Internet Explorer Compatibility</h2>
346
347 <p>The dygraphs library relies heavily on HTML's <code>&lt;canvas&gt;</code> tag, which Microsoft Internet Explorer does not support. Fortunately, some clever engineers created the <a href="http://code.google.com/p/explorercanvas/">excanvas</a> library, which implements the <code>&lt;canvas&gt;</code> tag in IE using VML.</p>
348
349 <p>You can add IE support to any page using dygraphs by including the following in your page:</p>
350
351<pre>
352&lt;head&gt;
353 &lt;!--[if IE]&gt;&lt;script src="excanvas.js"&gt;&lt;/script&gt;&lt;![endif]--&gt;
354&lt;/head&gt;
355</pre>
356
357 <p>This works quite well in practice. Charts are responsive, even under VML emulation.</p>
358
359 <p>One common gotcha to look out for: make sure you don't have any trailing commas in parameter lists, e.g.</p>
360
361<pre>
362new Dygraph(el, data, {
363 showRoller: true, // note trailing comma
364})</pre>
365
366 <p>Most browsers will ignore the trailing comma, but it will break under IE.</p>
367
368 <h2 id="gviz">GViz Data</h2>
369
370 <p>The <a href="http://code.google.com/apis/visualization/documentation/index.html">Google Visualization API</a> provides a standard interface for describing data. Once you've specified your data using this API, you can plug in any GViz-compatible visualization. dygraphs is such a visualization.</p>
371
372 <p>For a simple demonstration of how to use dygraphs a GViz visualization, see <a href="http://danvk.org/dygraphs/tests/gviz.html">http://danvk.org/dygraphs/tests/gviz.html</a>. dygraphs can also be used as a GViz gadget. This allows it to be embedded inside of a Google Spreadsheet. For a demonstration of this, see <a href="http://spreadsheets.google.com/ccc?key=0Anx1yCqeL8YUdDR1c3pPREhraGhkWmdhaURjOXRncXc&amp;hl=en">this spreadsheet</a>. The URL for the gadget is <code><a href="http://danvk.org/dygraphs/gadget.xml">http://danvk.org/dygraphs/gadget.xml</a></code>.</p>
373
374 <p>Here's an example of a published gviz gadget using dygraphs:</p>
375
376 <script src="http://spreadsheets.google.com/gpub?url=http%3A%2F%2Fkb8jbn8l90ocl9n4b14jrcvp61ceqis5.spreadsheets.gmodules.com%2Fgadgets%2Fifr%3Fup__table_query_url%3Dhttp%253A%252F%252Fspreadsheets.google.com%252Ftq%253Frange%253DA1%25253AC31%2526headers%253D-1%2526key%253D0Anx1yCqeL8YUdDR1c3pPREhraGhkWmdhaURjOXRncXc%2526gid%253D0%2526pub%253D1%26up__table_query_refresh_interval%3D300%26url%3Dhttp%253A%252F%252Fdanvk.org%252Fdygraphs%252Fgadget.xml%253Fnocache&height=215&width=530"></script>
377
378 <h2 id="baseball">Charting Fractions</h2>
379
380 <p>Situations often arise where you want to plot fractions, e.g. the fraction of respondents in a poll who said they'd vote for candidate X or the number of hits divided by at bats (baseball's batting average). Fractions require special treatment for two main reasons:</p>
381
382 <ul>
383 <li>The average of <code>a1/b1</code> and <code>a2/b2</code> is <code>(a1+a2)/(b1+b2)</code>, not <code>(a1/b1 + a2/b2)/2</code>.</li>
384 <li>The normal approximation is not always applicable and more sophisticated confidence intervals (e.g. the <a href="http://en.wikipedia.org/wiki/Binomial_proportion_confidence_interval">Wilson confidence interval</a>) must be employed to avoid ratios that exceed 100% or go below 0%.</li>
385 </ul>
386
387 <p>Fortunately, dygraphs handles both of these for you! Here's a chart and the command that generated it:</p>
388
389 <div style="width:750px; text-align:center; font-weight: bold; font-size: 125%;">Batting Average for Ichiro Suzuki vs. Mariners (2004)</div>
390 <div id="baseballdiv" style="width:750px; height:300px;"></div>
391 <script type="text/javascript">
392 new Dygraph(
393 document.getElementById("baseballdiv"),
394 "suzuki-mariners.txt",
395 {
396 fractions: true,
397 errorBars: true,
398 showRoller: true,
399 rollPeriod: 15
400 }
401 );
402 </script>
403
404 <p>Command:</p>
405<pre>
406 new Dygraph(
407 document.getElementById(&quot;baseballdiv&quot;),
408 &quot;suzuki-mariners.txt&quot;,
409 {
410 fractions: true,
411 errorBars: true,
412 showRoller: true,
413 rollPeriod: 15
414 }
415 );
416</pre>
417
418 <p>The <code>fractions</code> option indicates that the values in each column should be parsed as fractions (e.g. "1/2" instead of "0.5"). The <code>errorBars</code> option indicates that we'd like to see a confidence interval around each data point. By default, when <code>fractions</code> is set, you get a Wilson confidence interval. If you look carefully at the chart, you can see that the error bars are asymmetric.</p>
419
420 <p>A couple things to notice about this chart:</p>
421
422 <ul>
423 <li>The error bars for Ichiro's batting average are larger than for the Mariners', since he has far fewer at bats than his team.</li>
424 <li>dygraphs makes it easy to see "batting average over the last 30 games". This is ordinarily quite difficult to compute. It makes it clear where the "hot" and "cold" part of Suzuki's season were.</li>
425 <li>If you set the averaging period to something large, like 200, you'll see the team's and player's batting average through that game. The final number is the overall batting average for the season.</li>
426 <li>Where the error bars do not overlap, we can say with 95% confidence that the series differ. There is a better than 95% chance that Ichiro was a better hitter than his team as a whole in 2004, the year he won the batting title.</li>
427 </ul>
428
429 <h2 id="stock">One last demo</h2>
430
431 <p>This chart shows monthly closes of the Dow Jones Industrial Average, both in nominal and real (i.e. adjusted for inflation) dollars. The shaded areas show its monthly high and low. CPI values with a base from 1982-84 are used to adjust for inflation.</p>
432
433 <div id="dow_chart" style="width:900px; height:350px;"></div>
434 <p><b>Display: </b>
435 <input type=checkbox id=0 onClick="stockchange(this)" checked>
436 <label for="0"> Nominal</label>
437 <input type=checkbox id=1 onClick="stockchange(this)" checked>
438 <label for="1"> Real</label>
439 </p>
440
441 <script type="text/javascript">
442 // From http://www.econstats.com/eqty/eq_d_mi_3.csv
443 stockchart = new Dygraph(
444 document.getElementById('dow_chart'),
445 "dow.txt",
446 {
447 showRoller: true,
448 customBars: true,
449 labelsKMB: true
450 }
451 );
452
453 function stockchange(el) {
454 stockchart.setVisibility(el.id, el.checked);
455 }
456 </script>
457<!--
458
459Here is a script to regenerate the Dow Jones plot:
460
461# Get unadjusted DJIA data in a nice format:
462curl -O http://www.econstats.com/eqty/eq_d_mi_3.csv
463sed '1,17d' eq_d_mi_3.csv | cut -d, -f1,6 | perl -pe 's/(\d{4}-\d\d)-\d\d/$1/g' | perl -pe 's/, */\t/' | grep -v 'na' | perl -ne 'chomp; ($m,$v) = split/\t/; $close{$m} = $v; if ($low{$m} == 0 || $v < $low{$m}) { $low{$m}=$v } if ($v > $high{$m}) { $high{$m} = $v } END { for $x(sort keys %close) { print "$x\t$low{$x}\t$close{$x}\t$high{$x}\n" } } ' > monthly-djia.tsv
464
465# Fetch and format the CPI data:
466curl 'http://data.bls.gov/PDQ/servlet/SurveyOutputServlet?series_id=CUUR0000SA0&years_option=all_years&periods_option=all_periods&output_type=column&output_format=text&delimiter=comma' > cpi-u.txt
467sed '1,/Series Id,Year,/d' cpi-u.txt | sed '/^$/,$d' | cut -d, -f2,3,4 | perl -ne 'print if /,M(0[0-9]|1[012]),/' | perl -pe 's/(\d{4}),M(\d{2}),/$1-$2\t/g' > cpi-u.tsv
468
469# Merge:
470join -t' ' cpi-u.tsv monthly-djia.tsv > annotated-djia.tsv
471perl -ne 'BEGIN{print "Month,Nominal,Real\n"} chomp; ($m,$cpi,$low,$close,$high) = split /\t/; $cpi /= 100.0; print "$m-15,$low;$close;$high,",($low/$cpi),";",($close/$cpi),";",($high/$cpi),"\n"' annotated-djia.tsv > dow.txt
472
473-->
474
475 <h2 id="options">Other Options</h2>
476
477 <p>These are the options that can be passed in through the optional third parameter of the Dygraph constructor. To see demonstrations of many of these options, browse the <a href="tests/">dygraphs tests</a> directory.</p>
478
479 <table class="thinborder" width="900">
480 <thead>
481 <tr>
482 <th width="150">Name</th>
483 <th width="200">Values</th>
484 <th width="150">Default</th>
485 <th>Description</th>
486 </tr>
487 </thead>
488 <tbody>
489 <tr>
490 <td><strong>includeZero</strong></td>
491 <td><code>boolean</code></td>
492 <td><code>false</code></td>
493 <td>Usually, dygraphs will use the range of the data plus some padding to set the range of the y-axis. If this option is set, the y-axis will always include zero, typically as the lowest value. This can be used to avoid exaggerating the variance in the data.
494 <div class="tests">Tests: <a href="tests/no-range.html">no-range</a> <a href="tests/numeric-gviz.html">numeric-gviz</a> <a href="tests/small-range-zero.html">small-range-zero</a> </div>
495 </td>
496 </tr>
497 <tr>
498 <td><strong>rollPeriod</strong></td>
499 <td><code>integer &gt;= 1</code></td>
500 <td><code>1</code></td>
501 <td>Number of days over which to average data. Discussed extensively above.
502 <div class="tests">Tests: <a href="tests/demo.html">demo</a> <a href="tests/two-series.html">two-series</a> <a href="tests/noise.html">noise</a> </div>
503 </td>
504 </tr>
505 <tr>
506 <td><strong>showRoller</strong></td>
507 <td><code>boolean</code></td>
508 <td><code>false</code></td>
509 <td>If the rolling average period text box should be shown.
510 <div class="tests">Tests: <a href="tests/callback.html">callback</a> <a href="tests/crosshair.html">crosshair</a> <a href="tests/fractions.html">fractions</a> <a href="tests/isolated-points.html">isolated-points</a> <a href="tests/numeric-gviz.html">numeric-gviz</a> <a href="tests/underlay-callback.html">underlay-callback</a> </div>
511 </td>
512 </tr>
513 <tr>
514 <td><strong>colors</strong></td>
515 <td><code>['red', '#00FF00']</code></td>
516 <td><code></code></td>
517 <td>List of colors for the data series. These can be of the form "#AABBCC" or "rgb(255,100,200)" or "yellow", etc. If not specified, equally-spaced points around a color wheel are used.
518 <div class="tests">Tests: <a href="tests/color-visibility.html">color-visibility</a> <a href="tests/demo.html">demo</a> </div>
519 </td>
520 </tr>
521 <tr>
522 <td><strong>fillGraph</strong></td>
523 <td><code>boolean<br/></code></td>
524 <td><code>false</code></td>
525 <td>Should the area underneath the graph be filled? This option is not
526 compatible with error bars.
527 <div class="tests">Tests: <a href="tests/fillGraph.html">fillGraph</a> </div>
528 </td>
529 </tr>
530 <tr>
531 <td><strong>visibility</strong></td>
532 <td><code>Array of booleans<br/></code></td>
533 <td><code>[true, true, ...]</code></td>
534 <td>Which series should initially be visible? Once the Dygraph has
535 been constructed, you can access and modify the visibility of each
536 series using the <code>visibility</code> and
537 <code>setVisibility</code> methods.
538 <div class="tests">Tests: <a href="tests/visibility.html">visibility</a> <a href="tests/color-visibility.html">color-visibility</a> </div>
539 </td>
540 </tr>
541 <tr>
542 <td><strong>colorSaturation</strong></td>
543 <td><code>0.0 - 1.0</code></td>
544 <td><code>1.0</code></td>
545 <td>If <strong>colors</strong> is not specified, saturation of the automatically-generated data series colors.
546 <div class="tests">Tests: <font color=red>none</font></div>
547 </td>
548 </tr>
549 <tr>
550 <td><strong>colorValue</strong></td>
551 <td><code>float (0.0 &mdash; 1.0)</code></td>
552 <td><code>1.0</code></td>
553 <td>If colors is not specified, value of the data series colors, as in hue/saturation/value. (0.0-1.0, default 0.5)
554 <div class="tests">Tests: <font color=red>none</font></div>
555 </td>
556 </tr>
557 <tr>
558 <td><strong>clickCallback</strong></td>
559 <td><code>function(e, date){<br>&nbsp;&nbsp;&nbsp;&nbsp;alert(date);<br>}</code></td>
560 <td><code>null</code></td>
561 <td>A function to call when a data point is clicked. The function should take two arguments, the event object for the click and the date that was clicked. (default null)
562 <div class="tests">Tests: <a href="tests/callback.html">callback</a> </div>
563 </td>
564 </tr>
565 <tr>
566 <td><strong>zoomCallback</strong></td>
567 <td><code>function(minDate,<br/>maxDate){}</code></td>
568 <td><code>null</code></td>
569 <td>A function to call when the zoom window is changed (either by zooming in or out). minDate and maxDate are milliseconds since epoch.
570 <div class="tests">Tests: <a href="tests/callback.html">callback</a> </div>
571 </td>
572 </tr>
573 <tr>
574 <td><strong>strokeWidth</strong></td>
575 <td><code>integer</code></td>
576 <td><code>1</code></td>
577 <td>Width of the data lines. This can be used to increase the contrast or some graphs.
578 <div class="tests">Tests: <font color=red>none</font></div>
579 </td>
580 </tr>
581 <tr>
582 <td><strong>dateWindow</strong></td>
583 <td><code>[<br>&nbsp;&nbsp;Date.parse('2006-01-01'),<br>&nbsp;&nbsp;(new Date()).valueOf()<br>]</code></td>
584 <td rowspan="2"><code>Full range of the<br/> input is shown</code></td>
585 <td>Initially zoom in on a section of the graph. Is of the form [earliest, latest], where earliest/latest are milliseconds since epoch.
586 <div class="tests">Tests: <a href="tests/dateWindow.html">dateWindow</a> <a href="tests/link-interaction.html">link-interaction</a> </div>
587 </td>
588 </tr>
589 <tr>
590 <td><strong>valueRange</strong></td>
591 <td><code>[10, 110]</code></td>
592 <td>Explicitly set the vertical range of the graph to [low, high].
593 <div class="tests">Tests: <font color=red>none</font></div>
594 </td>
595 </tr>
596 <tr>
597 <td><strong>labelsSeparateLines</strong></td>
598 <td><code>boolean</code></td>
599 <td><code>false</code></td>
600 <td>Put <code>&lt;br/&gt;</code> between lines in the label string. Often used in conjunction with <strong>labelsDiv</strong>.
601 <div class="tests">Tests: <a href="tests/customLabel.html">customLabel</a> <a href="tests/demo.html">demo</a> </div>
602 </td>
603 </tr>
604 <tr>
605 <td><strong>labelsDiv</strong></td>
606 <td><code>document.<br/>getElementById('foo')</code></td>
607 <td><code>null</code></td>
608 <td>Show data labels in an external div, rather than on the graph.
609 <div class="tests">Tests: <a href="tests/demo.html">demo</a> <a href="tests/label-div.html">label-div</a> </div>
610 </td>
611 </tr>
612 <tr>
613 <td><strong>labelsKMB</strong></td>
614 <td><code>true</code></td>
615 <td><code>false</code></td>
616 <td>Show K/M/B for thousands/millions/billions on y-axis.
617 <div class="tests">Tests: <a href="tests/demo.html">demo</a> <a href="tests/labelsKMB.html">labelsKMB</a> <a href="tests/no-range.html">no-range</a> </div>
618 </td>
619 </tr>
620 <tr>
621 <td><strong>labelsKMG2</strong></td>
622 <td><code>true</code></td>
623 <td><code>false</code></td>
624 <td>Show k/M/G for kilo/Mega/Giga on y-axis. This is different than
625 <code>labelsKMB</code> in that it uses base 2, not 10.
626 <div class="tests">Tests: <a href="tests/labelsKMB.html">labelsKMB</a> </div>
627 </td>
628 </tr>
629 <tr>
630 <td><strong>labelsDivWidth</strong></td>
631 <td><code>250</code></td>
632 <td><code></code></td>
633 <td>Width (in pixels) of the div which shows information on the currently-highlighted points.
634 <div class="tests">Tests: <a href="tests/customLabel.html">customLabel</a> </div>
635 </td>
636 </tr>
637 <tr>
638 <td><strong>labelsDivStyles</strong></td>
639 <td><code>{}</code></td>
640 <td><code>null</code></td>
641 <td>Additional styles to apply to the currently-highlighted points div. For example, { 'font-weight': 'bold' } will make the labels bold.
642 <div class="tests">Tests: <a href="tests/border.html">border</a> <a href="tests/customLabel.html">customLabel</a> </div>
643 </td>
644 </tr>
645 <tr>
646 <td><strong>highlightCircleSize</strong></td>
647 <td><code>integer</code></td>
648 <td><code>3</code></td>
649 <td>The size in pixels of the dot drawn over highlighted points.
650 <div class="tests">Tests: <a href="tests/grid_dot.html">grid_dot</a> </div>
651 </td>
652 </tr>
653 <tr>
654 <td><strong>drawPoints</strong></td>
655 <td><code>boolean</code></td>
656 <td><code>false</code></td>
657 <td>Draw a small dot at each point, in addition to a line going through the point. This makes the individual data points easier to see, but can increase visual clutter in the chart.
658 <div class="tests">Tests: <a href="tests/draw-points.html">draw-points</a> </div>
659 </td>
660 </tr>
661 <tr>
662 <td><strong>pointSize</strong></td>
663 <td><code>interger</code></td>
664 <td><code>1</code></td>
665 <td>The size of the dot to draw on each point in pixels (see drawPoints). A dot is always drawn when a point is "isolated", i.e. there is a missing point on either side of it. This also controls the size of those dots.
666 <div class="tests">Tests: <font color=red>none</font></div>
667 </td>
668 </tr>
669 <tr>
670 <td><strong>pixelsPerXLabel</strong></td>
671 <td rowspan="2"><code>integer</code></td>
672 <td><code>60</code></td>
673 <td rowspan="2">Number of pixels to require between each x- and y-label. Larger values will yield a sparser axis with fewer ticks.
674 <div class="tests">Tests: <a href="tests/spacing.html">spacing</a> </div>
675 </td>
676 </tr>
677 <tr>
678 <td><strong>pixelsPerYLabel</strong></td>
679 <td><code>30</code></td>
680 </tr>
681 <tr>
682 <td><strong>xAxisLabelWidth</strong></td>
683 <td rowspan="2"><code>integer</code></td>
684 <td><code></code></td>
685 <td rowspan="2">Width (in pixels) of the x- and y-axis labels.
686 <div class="tests">Tests: <a href="tests/customLabel.html">customLabel</a> </div>
687 </td>
688 </tr>
689 <tr>
690 <td><strong>yAxisLabelWidth</strong></td>
691 <td><code></code></td>
692 </tr>
693 <tr>
694 <td><strong>axisLabelFontSize</strong></td>
695 <td><code>integer</code></td>
696 <td><code>14</code></td>
697 <td>Size of the font (in pixels) to use in the axis labels, both x- and y-axis.
698 <div class="tests">Tests: <font color=red>none</font></div>
699 </td>
700 </tr>
701 <tr>
702 <td><strong>rightGap</strong></td>
703 <td><code>integer</code></td>
704 <td><code></code></td>
705 <td>Number of pixels to leave blank at the right edge of the Dygraph. This makes it easier to highlight the right-most data point.
706 <div class="tests">Tests: <font color=red>none</font></div>
707 </td>
708 </tr>
709 <tr>
710 <td><strong>errorBars</strong></td>
711 <td><code>boolean</code></td>
712 <td><code>false</code></td>
713 <td>Does the data contain standard deviations? Setting this to true alters the input format (see above).
714 <div class="tests">Tests: <a href="tests/noise.html">noise</a> <a href="tests/customLabel.html">customLabel</a> <a href="tests/draw-points.html">draw-points</a> <a href="tests/fillGraph.html">fillGraph</a> <a href="tests/fractions.html">fractions</a> </div>
715 </td>
716 </tr>
717 <tr>
718 <td><strong>sigma</strong></td>
719 <td><code>integer</code></td>
720 <td><code></code></td>
721 <td>When errorBars is set, shade this many standard deviations above/below each point.
722 <div class="tests">Tests: <font color=red>none</font></div>
723 </td>
724 </tr>
725 <tr>
726 <td><strong>fractions</strong></td>
727 <td><code>boolean</code></td>
728 <td><code>false</code></td>
729 <td>When set, attempt to parse each cell in the CSV file as "a/b", where a and b are integers. The ratio will be plotted. This allows computation of Wilson confidence intervals (see below).
730 <div class="tests">Tests: <a href="tests/fractions.html">fractions</a> </div>
731 </td>
732 </tr>
733 <tr>
734 <td><strong>wilsonInterval</strong></td>
735 <td><code>boolean</code></td>
736 <td><code>true</code></td>
737 <td>Use in conjunction with the "fractions" option. Instead of plotting +/- N standard deviations, dygraphs will compute a Wilson confidence interval and plot that. This has more reasonable behavior for ratios close to 0 or 1.
738 <div class="tests">Tests: <font color=red>none</font></div>
739 </td>
740 </tr>
741 <tr>
742 <td><strong>customBars</strong></td>
743 <td><code>boolean</code></td>
744 <td><code>false</code></td>
745 <td>When set, parse each CSV cell as "low;middle;high". Error bars will be drawn for each point between low and high, with the series itself going through middle.
746 <div class="tests">Tests: <a href="tests/custom-bars.html">custom-bars</a> <a href="tests/zero-series.html">zero-series</a> </div>
747 </td>
748 </tr>
749 </tbody>
750 </table>
751
752 <h2>Common Gotchas</h2>
753
754 <p>Here are a few problems that I've frequently run into while using the dygraphs library.</p>
755
756 <ul>
757 <li>If your chart doesn't display, be sure to check your browser's JavaScript error console. dygraphs makes every attempt to log errors and warnings, and these can often guide you in the right direction.</li>
758 <li>Make sure your CSV files are readable! If your graph isn't showing up, the XMLHttpRequest for the CSV file may be failing. You can determine whether this is the case using tools like <a href="http://www.getfirebug.com/">Firebug</a>.</li>
759 <li>Make sure your CSV files are in the correct format. They must be of the form <code>YYYYMMDD, series1, series2, </code>&hellip; . And if you set the <code>errorBars</code> property, make sure you alternate data series and standard deviations.</li>
760 <li>dygraphs are not happy when placed inside a <code>&lt;center&gt;</code> tag. This applies to the CSS <code>text-align</code> property as well. If you want to center a Dygraph, put it inside a table with <code>align = center</code> set.</li>
761 <li>Don't set the <code>dateWindow</code> property to a date. It expects milliseconds since epoch, which can be obtained from a JavaScript Date object's valueOf method.</li>
762 <li>Make sure you don't have any trailing commas in your call to the Dygraph constructor or in the options parameter. Firefox, Chrome and Safari ignore these but they can cause a graph to not display in Internet Explorer.</li>
763 </ul>
764
765 <h2 id="policy">Data Policy</h2>
766 <p>dygraphs is purely client-side JavaScript. It does not send your data to any servers &ndash; the data is processed entirely in the client's browser.</p>
767
768 <p style="font-size:0.8em">Created May 9, 2008 by <a href=mailto:danvdk@gmail.com>Dan Vanderkam</a></p>
769 </div>
770
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danvk/dygraphs fork supporting touch events