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+ <meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7; IE=EmulateIE9">
<title>dygraphs JavaScript Visualization Library</title>
<!--[if IE]>
<script type="text/javascript" src="excanvas.js"></script>
<li><a href="#baseball">Baseball chart</a></li>
<li><a href="#stock">Stock chart</a></li>
<li><a href="#options">Options Reference</a></li>
+ <li><a href="#gwt">GWT Compatibility</a></li>
<li><a href="#policy">Data Policy</a></li>
</ul>
+ <h2>Features</h2>
+ <ul>
+ <li><a href="data.html">Data Formats</a></li>
+ <li><a href="annotations.html">Annotations</a></li>
+ </ul>
+
<h2>Project</h2>
<ul>
<li><a href="http://github.com/danvk/dygraphs">Source</a></li>
<li><a href="http://code.google.com/p/dygraphs/issues/">Issues</a></li>
<li><a href="http://code.google.com/p/dygraphs/issues/entry">Report Bug</a></li>
- <li><a href="mailto:danvdk [at] gmail">Contact</a></li>
+ <li><a href="changes.html">Contribute a change</a></li>
+ <li><a href="mailto:dygraphs-users [at] googlegroups.com">Contact</a></li>
</ul>
<h2>Gallery</h2>
<ul>
+ <li><a href="tests/">(browse demos)</a></li>
<li><a href="tests/demo.html">Basic Demo</a></li>
<li><a href="tests/gviz.html">GViz Demo</a></li>
<li><a href="tests/plotter.html">Equation Plotter</a></li>
<li><a href="tests/perf.html">Performance Test</a></li>
+ <li><a href="tests/annotation.html">Annotations</a></li>
+ <li><a href="tests/annotation-gviz.html">Annotations (GViz)</a></li>
+ <li><a href="tests/fillGraph.html">Filled Chart</a></li>
<li><a href="tests/perf.html">Fractions</a></li>
+ <li><a href="tests/visibility.html">Visibility</a></li>
<li><a href="tests/label-div.html">Labels in a DIV</a></li>
<li><a href="tests/numeric-axis.html">Numeric Axis</a></li>
<li><a href="tests/draw-points.html">Dotted Points</a></li>
<li><a href="tests/negative.html">Negative Numbers</a></li>
<li><a href="tests/noise.html">Noisy Data</a></li>
<li><a href="tests/two-series.html">Multiple Series</a></li>
+ <li><a href="tests/highlighted-region.html">Custom Underlay / background</a></li>
+ <li><a href="tests/zoom.html">Tests for zoom operations</a></li>
+ <li><a href="tests/logscale.html">Log scale tests</a></li>
</ul>
</div>
<h1>dygraphs JavaScript Visualization Library</h1>
<p><a href="http://github.com/danvk/dygraphs">http://github.com/danvk/dygraphs</a></p>
- <p>See <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>
+ <p>See <a href="http://g
roups.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>
<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>
<ul>
<li>Plots time series without using an external server or Flash</li>
<li>Works in Internet Explorer (using excanvas)</li>
- <li>Lightweight (45kb) and responsive</li>
+ <li>Lightweight (69kb) and responsive</li>
<li>Displays values on mouseover (this makes it easily discoverable)</li>
<li>Supports error bands around data series</li>
<li>Interactive zoom</li>
+ <li>Displays Annotations on the chart</li>
<li>Adjustable averaging period</li>
<li>Can intelligently chart fractions</li>
<li>Customizable click-through actions</li>
</div>
</div>
- <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 the its container to a reasonable default, calculates appropriate axis ranges and tick marks and draws the graph.</p>
+ <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>
<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&monthend=12&yearend=2007&req_city=NA&req_state=NA&req_statename=NA">Weather Underground</a>)</p>
<h2 id="ie">Internet Explorer Compatibility</h2>
- <p>The dygraphs library relies heavily on HTML's <code><canvas></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><canvas></code> tag in IE using VML.</p>
+ <p>The dygraphs library relies heavily on the HTML5 <code><canvas></code> tag, which Microsoft Internet Explorer did not traditionally support. To use Microsoft's native canvas implementation in IE9, you need to set an HTML5 doctype on your page:</p>
+
+ <pre>
+ <!DOCTYPE html>
+ </pre>
- <p>You can add IE support to any page using dygraphs by including the following in your page:</p>
+ <p>When IE9 is in HTML5 mode, dygraphs works just like in other modern browsers.</p>
+
+ <p>If you want to support previous versions of Internet Explorer (IE6–IE8), you'll need to include the <a href="http://code.google.com/p/explorercanvas/">excanvas</a> library, which emulates the <code><canvas></code> tag using VML. You can add excanvas by including this snippet:</p>
<pre>
<head>
</head>
</pre>
- <p>This works quite well in practice. Charts are responsive, even under VML emulation.</p>
+ <p>While this sounds like it would be slow, it works well in practice for most charts.</p>
<p>One common gotcha to look out for: make sure you don't have any trailing commas in parameter lists, e.g.</p>
<h2 id="gviz">GViz Data</h2>
- <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>
+ <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. In
+ particular, it can be used as a drop-in replacement for the
+ AnnotatedTimeline visualization used on Google Finance and other sites. To
+ see how this works, check out the <a href="tests/annotation-gviz.html">gviz
+ annotation demo.</a></p>
<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&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>
<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
- new Dygraph(
+ stockchart = new Dygraph(
document.getElementById('dow_chart'),
"dow.txt",
{
showRoller: true,
customBars: true,
- labelsKMB: 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>
<!--
<h2 id="options">Other Options</h2>
- <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>
-
- <table class="thinborder" width="900">
- <thead>
- <tr>
- <th width="150">Name</th>
- <th>Values</th>
- <th>Default</th>
- <th width="150">Description</th>
- </tr>
- </thead>
- <tbody>
- <tr>
- <td><strong>includeZero</strong></td>
- <td><code>boolean</code></td>
- <td><code>false</code></td>
- <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.</td>
- </tr>
- <tr>
- <td><strong>rollPeriod</strong></td>
- <td><code>integer >= 1</code></td>
- <td><code>1</code></td>
- <td>Number of days over which to average data. Discussed extensively above.</td>
- </tr>
- <tr>
- <td><strong>showRoller</strong></td>
- <td><code>boolean</code></td>
- <td><code>false</code></td>
- <td>If the rolling average period text box should be shown.</td>
- </tr>
- <tr>
- <td><strong>colors</strong></td>
- <td><code>['red', '#00FF00']</code></td>
- <td><code></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><strong>colorSaturation</strong></td>
- <td><code>0.0 - 1.0</code></td>
- <td><code>1.0</code></td>
- <td>If <strong>colors</strong> is not specified, saturation of the automatically-generated data series colors.</td>
- </tr>
- <tr>
- <td><strong>colorValue</strong></td>
- <td><code>float (0.0 — 1.0)</code></td>
- <td><code>1.0</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><strong>clickCallback</strong></td>
- <td><code>function(e, date){<br> alert(date);<br>}</code></td>
- <td><code>null</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><strong>zoomCallback</strong></td>
- <td><code>function(minDate, maxDate){}</code></td>
- <td><code>null</code></td>
- <td>A function to call when the zoom window is changed (either by zooming in or out). minDate and maxDate are milliseconds since epoch.</td>
- </tr>
- <tr>
- <td><strong>strokeWidth</strong></td>
- <td><code>integer</code></td>
- <td><code>1</code></td>
- <td>Width of the data lines. This can be used to increase the contrast or some graphs.</td>
- </tr>
- <tr>
- <td><strong>dateWindow</strong></td>
- <td><code>[<br> Date.parse('2006-01-01'),<br> (new Date()).valueOf()<br>]</code></td>
- <td rowspan="2"><code>Full range of the input is shown</code></td>
- <td>Initially zoom in on a section of the graph. Is of the form [earliest, latest], where earliest/latest are milliseconds since epoch.</td>
- </tr>
- <tr>
- <td><strong>valueRange</strong></td>
- <td><code>[10, 110]</code></td>
- <td>Explicitly set the vertical range of the graph to [low, high].</td>
- </tr>
- <tr>
- <td><strong>labelsSeparateLines</strong></td>
- <td><code>boolean</code></td>
- <td><code>false</code></td>
- <td>Put <code><br/></code> between lines in the label string. Often used in conjunction with <strong>labelsDiv</strong>.</td>
- </tr>
- <tr>
- <td><strong>labelsDiv</strong></td>
- <td><code>document.getElementById('foo')</code></td>
- <td><code>null</code></td>
- <td>Show data labels in an external div, rather than on the graph.</td>
- </tr>
- <tr>
- <td><strong>labelsKMB</strong></td>
- <td><code>true</code></td>
- <td><code>false</code></td>
- <td>Show K/M/B for thousands/millions/billions on y-axis.</td>
- </tr>
- <tr>
- <td><strong>labelsKMG2</strong></td>
- <td><code>true</code></td>
- <td><code>false</code></td>
- <td>Show k/M/G for kilo/Mega/Giga on y-axis. This is different than
- <code>labelsKMB</code> in that it uses base 2, not 10.</td>
- </tr>
- <tr>
- <td><strong>labelsDivWidth</strong></td>
- <td><code>250</code></td>
- <td><code></code></td>
- <td>Width (in pixels) of the div which shows information on the currently-highlighted points.</td>
- </tr>
- <tr>
- <td><strong>labelsDivStyles</strong></td>
- <td><code>{}</code></td>
- <td><code>null</code></td>
- <td>Additional styles to apply to the currently-highlighted points div. For example, { 'font-weight': 'bold' } will make the labels bold.</td>
- </tr>
- <tr>
- <td><strong>highlightCircleSize</strong></td>
- <td><code>integer</code></td>
- <td><code>3</code></td>
- <td>The size in pixels of the dot drawn over highlighted points.</td>
- </tr>
- <tr>
- <td><strong>drawPoints</strong></td>
- <td><code>boolean</code></td>
- <td><code>false</code></td>
- <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.</td>
- </tr>
- <tr>
- <td><strong>pointSize</strong></td>
- <td><code>interger</code></td>
- <td><code>1</code></td>
- <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.</td>
- </tr>
- <tr>
- <td><strong>pixelsPerXLabel</strong></td>
- <td rowspan="2"><code>integer</code></td>
- <td><code>60</code></td>
- <td rowspan="2">Number of pixels to require between each x- and y-label. Larger values will yield a sparser axis with fewer ticks.</td>
- </tr>
- <tr>
- <td><strong>pixelsPerYLabel</strong></td>
- <td><code>30</code></td>
- </tr>
- <tr>
- <td><strong>xAxisLabelWidth</strong></td>
- <td rowspan="2"><code>integer</code></td>
- <td><code></code></td>
- <td rowspan="2">Width (in pixels) of the x- and y-axis labels.</td>
- </tr>
- <tr>
- <td><strong>yAxisLabelWidth</strong></td>
- <td><code></code></td>
- </tr>
- <tr>
- <td><strong>axisLabelFontSize</strong></td>
- <td><code>integer</code></td>
- <td><code>14</code></td>
- <td>Size of the font (in pixels) to use in the axis labels, both x- and y-axis.</td>
- </tr>
- <tr>
- <td><strong>rightGap</strong></td>
- <td><code>integer</code></td>
- <td><code></code></td>
- <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.</td>
- </tr>
- <tr>
- <td><strong>errorBars</strong></td>
- <td><code>boolean</code></td>
- <td><code>false</code></td>
- <td>Does the data contain standard deviations? Setting this to true alters the input format (see above).</td>
- </tr>
- <tr>
- <td><strong>sigma</strong></td>
- <td><code>integer</code></td>
- <td><code></code></td>
- <td>When errorBars is set, shade this many standard deviations above/below each point.</td>
- </tr>
- <tr>
- <td><strong>fractions</strong></td>
- <td><code>boolean</code></td>
- <td><code>false</code></td>
- <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).</td>
- </tr>
- <tr>
- <td><strong>wilsonInterval</strong></td>
- <td><code>boolean</code></td>
- <td><code>true</code></td>
- <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.</td>
- </tr>
- <tr>
- <td><strong>customBars</strong></td>
- <td><code>boolean</code></td>
- <td><code>false</code></td>
- <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.</td>
- </tr>
- </tbody>
- </table>
+ <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>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>
projects / dygraphs.git / blobdiff