RGraph is a JavaScript charts library based on
HTML5 SVG and canvas. RGraph is mature (over 15 years
old) and has a wealth of features making it an ideal
choice to use for showing charts on your website.
Get the latest version of RGraph (version 6.18, 1st June 2024) 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.
How do I show two different scales on my Line chart?
Posted by Todd Shafer at 17:05 on Thursday 17th March 2022[link]
Hello,
I need to make a line chart with two lines of data. On the left, I want to use data1 and on the right data2. The reason I want to do this is because data1 use numbers ranging from 0 to 500 and data2 uses 0 to 100,000. As a result, if I put the 2 data's together the 0 to 500 gets pushed to the bottom of the graph. If I can separate them the numbers will be more visible. Can help me with this? Thanks!
Posted by Richard at 20:48 on Thursday 17th March 2022[link]
I can think of two ways to do this:
1. Use a logarithmic scale which goes something like this: 0,10,100,1000,10000,100000 so smaller values are more prominent than they normally would be. There's a demo of a logarithmic scale in the demos in the down called line-logarithmic-scale.html and also there's one here too: https://www.rgraph.net/demos/bar-logarithmic-scale.html This is not my preferred solution though...
2. ...Because this is: Using two Line charts, one layered on top of the other which also have the scales on different sides of the chart. There's a demo of this here: