http://journal.dedasys.com/articles/2007/10/30/chartr-plotr-generation-for-rails en-us 40 <p>I've been working on a <a href="http://www.langpop.com">project</a> that uses graphics created with <a href="http://solutoire.com/plotr/">Plotr</a>, and I wanted to automate that from Rails, so I created <a href="http://chartr.rubyforge.org/">Chartr</a>. It's not very complete, but works well enough to create stuff like this:</p> <hr/> <p><script src="http://chartr.rubyforge.org/prototype1_5_1_1.js" type="text/javascript"></script> <script src="http://chartr.rubyforge.org/excanvas.js" type="text/javascript"></script> <script src="http://chartr.rubyforge.org/plotr_uncompressed.js" type="text/javascript"></script></p> <p><div class="chart"> <canvas id="results_chart" height="300" width="500"></canvas> </div></p> <script type="text/javascript"> var dataset = {"Number/Decade": [[0, 1000], [1, 5000], [2, 20000], [3, 22000]]}; var options = {colorScheme: "#22aa22", legend: {position: {}}, axis: {x: {ticks: [{label: "1960", v: 0}, {label: "1970", v: 1}, {label: "1980", v: 2}, {label: "1990", v: 3}]}}, padding: {left: 100}, background: {}, stroke: {}, legend: {position: {left: '120px'}}}; var discvar = new Plotr.BarChart("results_chart", options); discvar.addDataset(dataset); discvar.render(); </script> <hr/> <p>Help is more than welcome! I think the API is still a bit clumsy, more chart types need adding, and there are other things that could probably be improved, but it does work.</p> Tue, 30 Oct 2007 08:15:00 -0700 urn:uuid:ff569c5f-e2ef-48ff-b50a-899b8fb4650f David N. Welton http://journal.dedasys.com/articles/2007/10/30/chartr-plotr-generation-for-rails ruby rails javascript http://journal.dedasys.com/articles/trackback/1816