ProtoChart is a new opensource library using Prototype and Canvas to create good looking charts. This library is highly motivated by Flot, Flotr and PlotKit libraries.

Features

• Line, bar, pie, curve, mix, and area charts available
• Multiple data series on same graph
• Highly customizable legend support
• Customizable grid, grid border, background
• Customizable axis-tick values (both x and y)
• Supports: IE6/7, FF2/3 and Safari
• Even works on an iPhone!

Demonstration

You may also be interested in:

Open Flash Chart

Open Flash Chart 1.x was great and it works like a dream. But I made some little mistakes which over time grew and anyoyed me and made the source code weird. So I decided it was time to re-jigger the code and make it pretty again. The big change is moving the data format to JSON. This has made a big difference and has allowed some pretty cool new features.

Why choose Open Flash Chart?

This is a little gentle propaganda for the project. Like all opinions, disregard it and make up your own mind.

Edge cases such as

• tooltips encourage user interactivity and data exploration
• what happens to the tooltip when two points are in the same position?
• you can re-size the charts
• missing data
• save the chart as an image
• You can highlight or emphasize one (or many) points

Demonstration