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Doughnut chart js

There are all sorts of things that can wrong, and I often just want to have something working so I can start tweaking it. This is a list of 10 working graphs bar chart, pie chart, line chart, etc. Bar charts are created by setting type to bar to flip the direction of the bars, set type to horizontalBar. The colors of the bars are set by passing one color to backgroundColor all bars will have the same coloror an array of colors.

Line charts are created by setting type to line. By default, lines come with a dark transparent fill, covering the area between the line and x-axis. If you want to remove fills for all your line graphs, a more efficiant way of achieving the same effect is to change the global default for fills: Chart. Pie charts are created by setting type to pie. They are almost identical to doughnut chartsand will work with the same configurations part from changing the type. Radar charts—also known as web charts, spider charts, star charts—are created by setting type to radar.

Radar charts typically require more vertical space than other graphs to be legible, so you might have to tweak the graph proportions. A polar area chart is created by setting type to polarArea. Polar area charts are closely related to pie charts, with the difference that in addition to the angles representing the relative size of the data points, the radius of each element is set in relation to its value.

Doughnut charts are created by setting type to doughnut. They are almost identical to pie chartsand will work the same configurations. Horizontal bar charts are created by setting type to horizontalBar. They are identical to regular bar charts in every other aspect, and will work with the same configurations. Setting the color for that group of bars is then done by passing a color to backgroundColor.

You can mix several charts and overlay them on top of each other. This is done by setting type to bar not to e. To produce the graph above, for example, we have four data objects: two set to barand two set to linewhile the type for the Chart object is set to bar. Bubble charts can be great for visualizing a lot of different data points simultaneously. In this example, every bubble is made up of three values: x position, y position, and size r —showing the GDP, happiness, and population, respectively, of each country.

I love to design and make things. I speak, teach, and consult at tech companies and startups, e. Say hi! Tobias Ahlin Bjerrome Stockholm, Sweden. Tobias Ahlin.

Get new posts delivered to your inbox. Say hi.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. How to render Text inside the doughnut chart, I am using ChartJs. None of the other answers resize the text based off the amount of text and the size of the doughnut.

Here is a small script you can use to dynamically place any amount of text in the middle, and it will automatically resize it. It will take any amount of text in the doughnut sized perfect for the doughnut. To avoid touching the edges you can set a side-padding as a percentage of the diameter of the inside of the circle.

Updating Charts

If you don't set it, it will default to You also the color, the font, and the text. The plugin takes care of the rest. The plugin code will start with a base font size of 30px. Credit to Jenna Sloan for help with the math used in this solution. Here is cleaned up and combined example of above solutions - responsive try to resize the windowsupports animation self-aligning, supports tooltips.

I'd avoid modifying the chart. Here's my solution:. Base on raph answer,Here the code for using text on doughnut chart on Chart. It has dynamic font-size for responsive option. Here the sample code.

This is based on Cmyker's update for Chart. I had an issue with the text alignment on Chrome when the legend is displayed as the chart height does not include this so it's not aligned correctly in the middle. Fixed this by accounting for this in the calculation of fontSize and textY. I calculated percentage inside the method rather than a set value as I have multiple of these on the page. Assumptions are that your chart only has 2 values otherwise what is the percentage of? I'm only using doughnuts to show percentages so it works for me.It's pretty common to want to update charts after they've been created.

When the chart data or options are changed, Chart. Adding and removing data is supported by changing the data array. To add data, just add data into the data array as seen in this example. To update the options, mutating the options property in place or passing in a new options object are supported. Scales can be updated separately without changing other options.

To update the scales, pass in an object containing all the customization including those unchanged ones. Variables referencing any one from chart. Code sample for updating options can be found in toggle-scale-type. Sometimes when a chart updates, you may not want an animation. To achieve this you can call update with a duration of 0. This will render the chart synchronously and without an animation.

Updating Charts. Updating Charts It's pretty common to want to update charts after they've been created. Adding or Removing Data Adding and removing data is supported by changing the data array.

If the options are mutated in place, other option properties would be preserved, including those calculated by Chart. If created as a new object, it would be like creating a new chart with the options - old options would be discarded. Preventing Animations Sometimes when a chart updates, you may not want an animation. No results matching " ".Pie and doughnut charts are probably the most commonly used charts. They are divided into segments, the arc of each segment shows the proportional value of each piece of data.

Pie and doughnut charts are effectively the same class in Chart.

doughnut chart js

This equates what percentage of the inner should be cut out. This defaults to 0 for pie charts, and 50 for doughnuts. They are also registered under two aliases in the Chart core.

Other than their different default value, and different alias, they are exactly the same. These are used to set display properties for a specific dataset. For example, the colours of the dataset's arcs are generally set this way. All these values, if undefinedfallback to the associated elements. When 'center' is set, the borders of arcs next to each other will overlap.

10 Chart.js example charts to get you started

When 'inner' is set, it is guaranteed that all borders will not overlap. These options are merged with the global chart configuration options, and form the options of the chart. We can also change these default values for each Doughnut type that is created, this object is available at Chart.

doughnut chart js

Pie charts also have a clone of these defaults available to change at Chart. For a pie chart, datasets need to contain an array of data points.

The data points should be a number, Chart. Doughnut and Pie Pie and doughnut charts are probably the most commonly used charts. They are excellent at showing the relational proportions between data. No results matching " ". The relative thickness of the dataset.When it comes to changing the chart size based on the window size, a major limitation is that the canvas render size canvas.

Furthermore, these sizes are independent from each other and thus the canvas render size does not adjust automatically based on the display size, making the rendering inaccurate. Detecting when the canvas size changes can not be done directly from the canvas element. However, this method requires the container to be relatively positioned and dedicated to the chart canvas only.

Doughnut and Pie

Responsiveness can then be achieved by setting relative values for the container size example :. Note that in order for the above code to correctly resize the chart height, the maintainAspectRatio option must also be set to false. CSS media queries allow changing styles when printing a page. The CSS applied from these media queries may cause charts to need to resize. However, the resize won't happen automatically. To support resizing charts when printing, one needs to hook the onbeforeprint event and manually trigger resizing of each chart.

Responsive Charts When it comes to changing the chart size based on the window size, a major limitation is that the canvas render size canvas. Configuration Options Name Type Default Description responsive boolean true Resizes the chart canvas when its container does important note Note that this option is ignored if the height is explicitly defined either as attribute or via the style.

Gets passed two arguments: the chart instance and the new size. Important Note Detecting when the canvas size changes can not be done directly from the canvas element. No results matching " ". Resizes the chart canvas when its container does important note Canvas aspect ratio i.Henry, United Kingdom Scenic Ring of Iceland, May 2015 All services, from pick up at the Airport to the return bus service and including accommodation and meals, were to a very good standard and problem-free.

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Responsive Charts

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doughnut chart js

Merse was about par for the course in last weekend, with six correct results and one correct scoreline. Live on These aren't the games that matter for West Ham. Watford are really good away from home and Burnley haven't been as good at home, so you'd expect an away win, but I think Burnley will sneak this one.

Burnley are just solid. They have had some really good results, so they are so hard to bet against. They are going to get it right at home soon. They are right in it now, and a win here will really help them out.

Brighton 1-5 Liverpool Brighton 1-5 Liverpool Bournemouth won't be able to cope with Wilfried Zaha. They can attack at will, but sometimes when quality players get at them, they really can struggle. It will be a really good game, as both teams will have a go. Such a hard one to call.


I have seen Huddersfield a few times this season. They have got some amazing results, and all credit to the manager for setting them up to win those games. At home they are a force, but not so much away from home. They remind me of Fulham a few years ago, when they had a great home record. It takes its toll in the end, though, and the home wins can dry up when you put too much pressure on your home form.

I can't separate these two. The thing with Swansea is their games haven't really been that difficult so far. They have played a lot of teams around them, and they still haven't got the points.

Going 1-0 up at Stoke, if that stays 1-0 for longer, then it becomes a different game. They have to win this, and I think they win. It will be a huge result. Against Swansea, Stoke fell over the line, but sometimes when you win a game like that, everything is rosy.

However, on this big pitch, Tottenham are too good for Stoke. Tottenham need to win this game, otherwise they will be struggling for the top four.

I think Mauricio Pochettino started off their poor run to be honest, when he took Harry Kane and Dele Alli off against Arsenal, when the game was still in the balance. Their performances have been nowhere near as good since. Newcastle will have to go at Leicester, and they could be picked off, like Bournemouth did to them.

Leicester have bought into Claude Puel's thinking. Jamie Vardy is back and Riyad Mahrez looks like he fancies it again. Man Utd were second best at the Emirates and won 3-1.

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