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.
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.
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.
Latest forum posts
These are the latest support forum posts that have been
posted or updated.
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?
8th May, Anthony Kuma
Does the SVG Line chart have outofbounds functionality?
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.The lineTo function
The lineTo function is used whilst drawing paths to the canvas to move the 'pen' to a new set of coordinates and drawing a line to the new coordinates. Nothing is actually drawn to the canvas until you call the stroke or fill functions. The color of the line is controlled by setting the strokeStyle property and the width of the line by the lineWidth property.
Note that only the destination X/Y coordinates are given to this function - the start X/Y coordinates are the endpoint of the last drawing operation (eg a moveTo or bezierCurveTo operation).
Arguments to the function
- The x-axis coordinate
- The y-axis coordinate
- The y-axis coordinate
An example
<script>
window.onload = function ()
{
var canvas = document.getElementById("cvs");
var context = canvas.getContext('2d');
context.beginPath();
context.moveTo(100, 100);
context.lineTo(200, 200);
context.stroke();
}
</script>