Chart.js with Error Bars

*This is an fork of Chart.js which supports error bars. It can be used as a stand-alone library or as an extension of the original library.

Documentation

You can find documentation for Chart.js at chartjs.org/docs. Usage of the extension is noted below.

Include Error Bars

Including error bars is extremely simple. Download this version of Chart.js and include it in your site. To add error bars, include an array called error (of the same length as the data array) in each dataset.

Options included with this version of the library:

	//String - direction of the error bars. "up", "down", or "both"
	errorDir : "both",

	//Number - stroke width of the error bars
	errorStrokeWidth : 1,

	//Number - ratio of the width of the error bar caps to the width of the bar
	errorCapWidth : 0.75,
	//For line charts, errorCapWidth is the ratio of the width of the error bar
	//caps to the radius of the points, and the default is 2.5.

Compatibility

This repo is compatible with @nnnick/Chart.js, so even if you are already using Chart.js on your site, switching to my version will not harm anything.

Chart.js 2.0

A previous version (based on the old, non-API version of Chart.js) also supported scatter plots, box plots, and trendlines. This version of the project is available in the "old" branch.

At one point I made a attempt to integrate these features into the current project, but got frustrated because the API was constantly forcing me to write repetitive code. There has been a flurry of development recently toward Chartjs 2.0 which looks like it will address this - so stay tuned.

License

Chart.js, and this exension, are available under the MIT license.

Bugs & issues

When reporting bugs or issues, if you could include a link to a simple jsbin or similar demonstrating the issue, that'd be really helpful.