- customBars: true,
- labelsKMB: true,
- padding: {left:30, right:30, top:5, bottom:5}
- });
-</script>
-
-
-<h2>Other Options</h2>
-<p>These are the options that can be passed in through the fourth parameter of the DateGraph constructor.</p>
-
-<table class=thinborder width=1000>
- <tr><th>Name</th><th>Sample Value</th><th>Description</th></tr>
- <tr>
- <td><b>rollPeriod</b></td>
- <td><code>7</code></td>
- <td>Number of days over which to average data. Discussed extensively above.</td>
- </tr><tr>
- <td><b>showRoller</b></td>
- <td><code>true</code></td>
- <td>Should the rolling average period text box be shown? Default is false.</td>
- </tr><tr>
- <td><b>colors</b></td>
- <td><code>['red', '#00FF00']</code></td>
- <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.</td>
- </tr><tr>
- <td><b>colorSaturation</b></td>
- <td><code>1.0</code></td>
- <td>If <b>colors</b> is not specified, saturation of the
- automatically-generated data series colors. (0.0-1.0, default:
- 1.0)</td>
- </tr><tr>
- <td><b>colorValue</b></td>
- <td><code>0.5</code></td>
- <td>If colors is not specified, value of the data series colors, as in
- hue/saturation/value. (0.0-1.0, default 0.5)</td>
- </tr><tr>
- <td><b>clickCallback</b></td>
- <td><code>function(e,date){ alert(date); }</code></td>
- <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)</td>
- </tr><tr>
- <td><b>errorBars</b></td>
- <td><code>false</code></td>
- <td>Does the data contain standard deviations? Setting this to true alters
- the input format (see above). (default false)</td>
- </tr><tr>
- <td><b>strokeWidth</b></td>
- <td><code>2.0</code></td>
- <td>Width of the data lines. This can be used to increase the contrast or
- some graphs. (default 1.0)</td>
- </tr><tr>
- <td><b>dateWindow</b></td>
- <td><code>[(new Date('2006-01-01')).valueOf(),<br/>
- (new Date()).valueOf()]</code></td>
- <td>Initially zoom in on a section of the graph. Is of the form [earliest,
- latest], where earliest/latest are millis since epoch. By default, the
- full range of the input is shown.</td>
- </tr><tr>
- <td><b>valueRange</b></td>
- <td><code>[10, 110]</code></td>
- <td>Explicitly set the vertical range of the graph to [low, high]. By
- default, some clever heuristics are used (see above).</td>
- </tr><tr>
- <td><b>minTickSize</b></td>
- <td><code>1</code</td>
- <td>The difference between ticks on the y-axis can be greater than or equal
- to this, but no less. If you set it to 1, for instance, you'll never get
- nonintegral gaps between ticks.</td>
- </tr><tr>
- <td><b>labelsSeparateLines</b></td>
- <td><code>true</code></td>
- <td>Put <br/> between lines in the label string. Often used in
- conjunction with <b>labelsDiv</b>. (default false)</td>
- </tr><tr>
- <td><b>labelsDiv</b></td>
- <td><code>document.getElementById('foo')</code></td>
- <td>Show data labels in an external div, rather than on the graph. (default
- null)</td>
- </tr><tr>
- <td><b>labelsKMB</b></td>
- <td><code>true</code></td>
- <td>Show K/M/B for thousands/millions/billions on y-axis (default
- false).</td>
- </tr>
- <tr>
- <td><b>padding</b></td>
- <td><code>{left: 40, right: 30,<br/>top: 5,
- bottom: 15}</code></td>
- <td>Adds extra pixels of padding around the graph. Sometimes a dygraph
- gets clipped by surrounding text (see the Demo at the top of this page).
- Setting this property appropriately will fix this problem.</td>
- </tr>
-</table>
-
-<p>Any options you specify also get passed on to PlotKit's <a href="http://media.liquidx.net/js/plotkit-doc/PlotKit.Renderer.html">Renderer</a> class. DateGraph will override some of these (e.g. strokeColor), but others may be useful. The <code>padding</code> property is an example of this.</p>
-
-<h2>Common Gotchas</h2>
-<p>Here are a few problems that I've frequently run into while using the
-dygraphs library.</p>
-
-<ul>
- <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>
-
- <li>Make sure your CSV files are in the correct format. They must be of the
- form <code>YYYYMMDD,series1,series2,...</code>. If you're specifying the
- names of each data series in the CSV file itself, make sure that you pass
- <code>null</code> as the third parameter to the DateGraph constructor to let
- the library know that. And if you set the <code>errorBars</code> property,
- make sure you alternate data series and standard deviations.</li>
-
- <li>dygraphs are not happy when placed inside a <code><center></code>
- tag. This applies to the CSS <code>text-align</code> property as well. If you
- want to center a DateGraph, put it inside a table with "align=center"
- set.</li>
-
- <li>If you specify the <code>colors</code> property or name the data series
- using the third parameter of the DateGraph constructor, make sure the number
- of data series agree in all places: <code>colors</code>, third parameter and
- in each line of the CSV file itself.</li>
-
- <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>
-</ul>
-
-<p><font size=-1>Created May 9, 2008 by <a href=mailto:danvdk@gmail.com>Dan Vanderkam</a></font></p>
+ rollPeriod: 15
+ }
+ );
+</pre>
+
+ <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>
+
+ <p>A couple things to notice about this chart:</p>
+
+ <ul>
+ <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>
+ <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>
+ <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>
+ <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>
+ </ul>
+
+ <h2 id="stock">One last demo</h2>
+
+ <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>
+
+ <div id="dow_chart" style="width:900px; height:350px;"></div>
+ <p><b>Display: </b>
+ <input type=checkbox id=0 onClick="stockchange(this)" checked>
+ <label for="0"> Nominal</label>
+ <input type=checkbox id=1 onClick="stockchange(this)" checked>
+ <label for="1"> Real</label>
+ <input type=checkbox id=ann onClick="annotationschange(this)" checked>
+ <label for="ann"> Annotations</label>
+ </p>
+
+ <script type="text/javascript">
+ var stock_annotations = [
+ {
+ series: "Real",
+ x: "1929-08-15",
+ shortText: "A",
+ text: "1929 Stock Market Peak"
+ },
+ {
+ series: "Nominal",
+ x: "1987-08-15",
+ shortText: "B",
+ text: "1987 Crash"
+ },
+ {
+ series: "Nominal",
+ x: "1999-12-15",
+ shortText: "C",
+ text: "1999 (.com) Peak"
+ },
+ {
+ series: "Nominal",
+ x: "2007-10-15",
+ shortText: "D",
+ text: "All-Time Market Peak"
+ }
+ ];
+
+ // From http://www.econstats.com/eqty/eq_d_mi_3.csv
+ stockchart = new Dygraph(
+ document.getElementById('dow_chart'),
+ "dow.txt",
+ {
+ showRoller: true,
+ customBars: true,
+ labelsKMB: true,
+ drawCallback: function(g, is_initial) {
+ if (!is_initial) return;
+ g.setAnnotations( stock_annotations );
+ }
+ }
+ );
+
+ function stockchange(el) {
+ stockchart.setVisibility(el.id, el.checked);
+ }
+
+ function annotationschange(el) {
+ if (el.checked) {
+ stockchart.setAnnotations(stock_annotations);
+ } else {
+ stockchart.setAnnotations([]);
+ }
+ }
+ </script>
+<!--
+
+Here is a script to regenerate the Dow Jones plot:
+
+# Get unadjusted DJIA data in a nice format:
+curl -O http://www.econstats.com/eqty/eq_d_mi_3.csv
+sed '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
+
+# Fetch and format the CPI data:
+curl '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
+sed '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-$2\t/g' > cpi-u.tsv
+
+# Merge:
+join -t' ' cpi-u.tsv monthly-djia.tsv > annotated-djia.tsv
+perl -ne 'BEGIN{print "Month,Nominal,Real\n"} chomp; ($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
+
+-->
+
+ <h2 id="options">Other Options</h2>
+
+ <p>In addition to the options mentioned above (<code>showRoller</code>, <code>rollPeriod</code>, <code>errorBars</code>, <code>valueRange</code>), there are <i>many</i> others.</p>
+
+ <p>For a full list, see the <a href="options.html">Dygraphs Options Reference</a> page.</p>
+
+ <h2>Common Gotchas</h2>
+
+ <p>Here are a few problems that I've frequently run into while using the dygraphs library.</p>
+
+ <ul>
+ <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>
+ <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>
+ <li>Make sure your CSV files are in the correct format. They must be of the form <code>YYYYMMDD, series1, series2, </code>… . And if you set the <code>errorBars</code> property, make sure you alternate data series and standard deviations.</li>
+ <li>dygraphs are not happy when placed inside a <code><center></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>
+ <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>
+ <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>
+ </ul>
+
+ <h2 id="gwt">GWT Compatibility</h2>
+ <p>There is currently no GWT wrapper around Dygraphs, however there is a class that can be used to easily load Dygraphs into the browser. To use it, include the generated dygraph-gwt.jar file in your classpath and add the following line to your GWT module:</p>
+
+<pre>
+<inherits name="org.danvk.dygraphs"/>
+</pre>
+
+ <p>Call org.danvk.Dygraphs.install() when your application starts to install the JavaScript code into the browser. You can use <a href="http://code.google.com/webtoolkit/doc/latest/DevGuideCodingBasicsJSNI.html">JSNI</a> to call Dygraphs from your GWT code, as in the example below. The example uses the <a href="http://code.google.com/p/gwt-google-apis/wiki/VisualizationGettingStarted">Visualization API for GWT</a> and the <a href="#gviz">Dygraphs GViz API.</a></p>
+
+<pre>
+ public static native JavaScriptObject drawDygraph(Element element, DataTable dataTable, double minY, double maxY) /*-{
+ var chart = new $wnd.Dygraph.GVizChart(element);
+ chart.draw(dataTable,
+ {
+ valueRange: [minY, maxY]
+ });
+ return chart;
+ }-*/;
+</pre>
+
+ <h2 id="policy">Data Policy</h2>
+ <p>dygraphs is purely client-side JavaScript. It does not send your data to any servers – the data is processed entirely in the client's browser.</p>
+
+ <p style="font-size:0.8em">Created May 9, 2008 by <a href=mailto:danvdk@gmail.com>Dan Vanderkam</a></p>
+ </div>
+