About
RGraph is a JavaScript charts library based on
HTML5 SVG and canvas. RGraph is mature (over 16 years
old) and has a wealth of features making it an ideal
choice to use for showing charts on your website.
Download
Get the latest version of RGraph (version 6.20, 1st December 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.
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-axiscoordinate - The
y-axiscoordinate - The
y-axiscoordinate
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>