Labels: ,ĭata: Ĭonst totalDatasetSum = .data.reduce((a, b) => (a + b), 0) Ĭonst percentage = val * 100 / totalDatasetSum Ĭonst roundedPercentage = Math.round(percentage * 100) / 100įamily: "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif",Ĭonst original =. Ĭonst labelsOriginal = original. StundenGesamt = // Storing the value of total hours from the database in a variable ServerData = JSON.parse(http.responseText) Parsing the JSON file and storing it into a variable (Console.Log() to make sure it works) tRequestHeader('key', 'key-sample') // Hidden the actual key as it is from the actual server from my company SetInterval(chartRender, 5000) // Rendering the chart every 5 seconds Function that calculates the workdays passed up until todayĬhartRender() // Calling the function that renders the chart Here is the code: let serverData Ĭonst url = '' // Hidden the actual URL as it is the actual server from my companyĬonst chart = document.getElementById("multie-pie-chart")
#Meta chart pie chart how to#
If anyone could tell me any ideas on how to do this in this case, I would really appreciate it. I have seen about the destroy() method and update() method, but I haven't been able to find a solution for my specific case. The best part is that you can design and share your charts online at no costs. All you need is data and you can start building charts and graphs from scratch.
#Meta chart pie chart free#
True to the name, this kind of visualization uses a circle to represent the whole, and slices of that circle, or pie, to represent the specific categories that compose the whole. If you are searching for simple and absolutely easy to use online free graphing software, can be your answer. So I understand what is happening, I am trying to create the chart over and over again on the same canvas element, and that of course doesn't work. What is a Pie Chart A pie chart helps organize and show data as a percentage of a whole. Chart with ID '0' must beĭestroyed before the canvas can be reused.
Uncaught Error: Canvas is already in use. I have used setInterval to call this function every 5 seconds, and in practice this works, but I get this error : I have the chart together with the request to server, all in one function which I then call on windows.onload. I would say I have most of it done, but I have a problem with ChartJs.
I am working on making requests to the server every X number of seconds, so the data displayed on the chart gets updated automatically without having to refresh or do anything. The data used for this chart is taken through requests to a server. I'm working on a website where I use a chart from the ChartJs library. First of all, I would like to say that I'm a student learning programming for around a month, so expect to see many mistakes.
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