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.net Powerful JavaScript charts
About
RGraph is a JavaScript charts library based on HTML5 SVG and canvas. RGraph is mature (over 18 years old) and has a wealth of features making it an ideal choice to use for showing charts on your website.

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Version 7.20
Version 7.20 (released in June 2026) is the latest version of RGraph and the major change in this version is an update to the default values of properties making for better looking charts without having to set any properties. Read more about this and other changes in the changelog.

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Download
Get the latest version of RGraph (version 7.20, 9th June 2026) from the download page. You can read the changelog here. There's also older versions available, minified files and links to cdnjs.com hosted libraries.

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Latest forum posts
These are the latest support forum posts that have been posted or updated.

16th June, Rachel
I have a question about the 3D Bar chart
12th June, Marco
Should I use SVG or canvas for the charts on my website?
9th June, Richard
New version of RGraph: version 7.20
3rd June, Patrick
Question about installing RGraph
1st June, Ouja
How do I add a click event to a bar in my Bar chart?


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License
RGraph can be used for free under the GPL or if that doesn't suit your situation there's an inexpensive (£129) commercial license available.

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How would I implement multi-channel Line charts?


Posted by Vladimir at 08:33 on Thursday 19th August 2021 [link]
Hi, how can you implement multi-channel line graphs in rgraph, where each channel is represented by a separate graph (a sine wave), but all channels are displayed in a single coordinate system on the X axis(timestamps) and on the Y axis these are separate graphs. An example picture [LINK REMOVED]

Posted by Richard at 13:26 on Thursday 19th August 2021 [link]
If by "multi-channel" you mean multiple datasets then yes you can do that with RGraph.

Here's some demos from the download archive ( https://www.rgraph.net/download.html#stable ) that show Line charts with multiple datasets.

demos/line-tooltips-formatted-table.html
demos/line-tooltips-dataset.html
demos/line-stacked-filled.html
demos/line-spline-multiple-lines.html
demos/line-spline-filled.html
demos/line-offset-x-axis.html
demos/line-nvd.html
demos/line-front-page.html
demos/line-adjustable.html
demos/line-adjustable-limited.html

Simply, whereas normally you would give your data as an array:

[4,8,6,5,3,5,6]

To show multiple datasets you'd change that to give an array of arrays.

[ [4,8,6,3,5,4,2], [8,7,9,6,4,8,8] ]

Posted by Vladimir at 05:10 on Friday 20th August 2021 [link]
Thank you Richard for the excellent examples. They are really good, but they will not work in my task. I would like to divide the graphs into different coordinate planes. as it is shown in the picture by the link in my question. Thank you again for your attention to my question.

Posted by Richard at 10:16 on Friday 20th August 2021 [link]
I see. Well if you're using the Scatter chart there's a backgroundVbars option that you could use to do that.

https://www.rgraph.net/canvas/scatter.html#background-properties

The Line chart won't really work in this case because the Line chart doesn't have an X axis scale (each point is just spread equally across the chart) - so use the Scatter chart (so effectively you'd have an X/Y chart where you give the X and Y values of each point) with the line option specified:

https://www.rgraph.net/canvas/scatter.html#line-properties

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