Update: User cphyc has kindly created a Github repository for the code in this answer (see here), and bundled the code into a package which may be installed using pip install matplotlib-label-lines. Pretty Picture: In matplotlib it’s pretty easy to label contour plots (either automatically or by manually placing labels with mouse clicks). There does … Read more
I had huge problems with this First I tried .clear() then I tried .destroy() and I tried setting my chart reference to null What finally fixed the issue for me: deleting the <canvas> element and then reappending a new <canvas> to the parent container My specific code (obviously there’s a million ways to do this): … Read more
There is charts4j which is a charts and graphs API. It enables developers to programmatically create the charts available in the Google Chart API through a straightforward and intuitive Java API. Disclaimer: I wrote charts4j. We will be doing another major release in the next few weeks.
By adding and tuning some configuration options listed in the API documentation, you can create a lot of different styles. For instance, here is a version that removes most of the extra blank space by setting the chartArea.width to 100% and chartArea.height to 80% and moving the legend.position to bottom: // Set chart options var … Read more
Some might encounter this error either locally or on the server: syntax error var data = new google.visualization.DataTable(<?=$jsonTable?>); This means that their environment does not support short tags the solution is to use this instead: <?php echo $jsonTable; ?> And everything should work fine!
From chart.js version 2.x backwards: The options object can be added to the chart when the new Chart object is created. var chart1 = new Chart(canvas, { type: “pie”, data: data, options: { legend: { display: false }, tooltips: { enabled: false } } });
For Chart.js 2.*, the option for the scale to begin at zero is listed under the configuration options of the linear scale. This is used for numerical data, which should most probably be the case for your y-axis. So, you need to use this: options: { scales: { yAxes: [{ ticks: { beginAtZero: true } … Read more
Try gnuplot. It has very powerful graphing possibilities. It can output to your terminal in the following way: gnuplot> set terminal dumb Terminal type set to ‘dumb’ Options are ‘feed 79 24’ gnuplot> plot sin(x) 1 ++—————-**—————+—-**———–+——–**—–++ + *+ * + * * + sin(x) ****** + 0.8 ++ * * * * * * … Read more
Update: Looks like chartjs has been updated (see comment below). There are some examples up that look very nice: Here’s an example of updating a line chart using new data: http://jsbin.com/yitep/5/edit Here’s how we can update existing data on a line chart: http://jsbin.com/yitep/4/edit Original Post As of Nov 2013, there seem to be very few … Read more
Free tools supporting panning / zooming: Live Charts ScottPlot DynamicDataDisplay – a nice, open source data visualization library. Unfortunately it’s not been updated since April 30, 2009. OxyPlot Free tools without built in pan / zoom support: WPF Toolkit. Supports most important 2D charts, you’ll have to implement pan / zoom yourself. WPF Toolkit Development … Read more