https://subscription.packtpub.com/.../working-with-larger-and-multiple-datasets When a user picks a new set of dates, a new request will be sent to the Cube.js server. It's pretty common to want to update charts after they've been created. I'm trying to use chart.js to create a bar chart that shows the number of ad impressions in an ad buy by publication. A common example is a bar chart that also includes a line dataset. I'm considering moving from Highcharts to chart.js and one of the things I will need is a pie/doughnut chart with multiple datasets. You can also use XML or CSV to plot data in the chart. It is highly customizable, but configuring all of its options remains a challenge for some people. It is easy to parse JSON data and generate graph accordingly. Chart.js is a popular open source library that helps us to plot data in web applications. Creating a mixed chart starts with the initialization of a basic chart. Column Charts with Multiple Axes are really useful when two or more data sets needs to be plotted against different scale ranges. Updating Charts. Mixed Chart Types. Chart.js version: 2.x (2.4.0 in the test linked above) Browser: Chrome My project is indeed quite complex: I create the chart in one place, then I would like to update my chart later on in another place, by calling myLine.data = newDataObject. Ideas are welcome! When a user picks a new set of dates, a new request will be sent to the Cube.js server. When the chart data or options are changed, Chart.js will animate to the new data values and options. I have created the graph output for dynamic data retrieved from the database. Environment. The Cube.js server will generate new SQL code, execute it against the database, and send the result back to the client. And finally, the client re-renders a chart with the new data. Chart HTML5 Canvas This way you can separate the UI from Data. The given example show how to parse JSON data from AJAX request and render chart. The desired chart would show a bar for each publication representing the number of impressions for the ad on that website. Adding or Removing Data. We’ll let the user pick a date range and based on that, reload the chart. Generally, it’s good idea to fetch data via AJAX request rather than embedding it in the web page. Adding and removing data is supported by changing the data array. Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor. With Chart.js, it is possible to create mixed charts that are a combination of two or more different chart types. Multiple Axes makes it easier to compare different series within the same graph instead of flipping between two charts. The Cube.js server will generate new SQL code, execute it against the database, and send the result back to the client. 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