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Javascript Graphing Utility using HTML 5 Canvas
JavaScript Perl CSS Shell
Branch: master
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about update 2.png
design add settings and refresh button to psd
doc put everything back now
font moved rewrite to main
images mozilla marketplace manifest
langs language support
scripts publish langs/
.gitignore .gitignore .DS_Store
CNAME publish d10e10c
Makefile typo in makefile more up to date information in readme
apple-touch-icon.png iPhone stuff
apple-touch-startup-image.png iPhone stuff
buttons.png add settings button and apply white highlight to reload button (from …
excanvas.compiled.js excanvas
favicon.ico a
google43874269a416ea31.html add google webmaster verification file
grab.gif get rid of php
grabbing.gif get rid of php
icon_128.png added icon
index.html publish 6068225
jquery.js update to jquery 1.6.1
main.css clicking help button in FF was loading two new tabs
main.js screenshot api
manifest.json double factorial
manifest.manifest screenshot api
manifest.template.manifest add en-us to manifest.
manifest.webapp mozilla marketplace manifest
math.js cleanup code indentation
mathquill.css fonts
mathquill_modified.js iPhone support (.focus())
release.template.html disable html5 app cache \(removed manifest=manifest.manifest)
sw.png combine css on make
ui.js add google webmaster verification file is being rewritten from scratch (again), and that new version hasn't been released publicly yet. The code is not available either. So, development on this git repository has ended, because the new version will be much, much better.

The math CAS code for the new version is available under javascript-cas, which is currently being worked on so isn't really suitable as a library for other things yet. is a web application that graphs, solves, simplifies, integrates and differentiates expressions. Currently, it can differentiate most of the functions it knows, but there are many bugs. It cannot expand or factorize properly yet, so it cannot find inverses well, or solve equations. It can currently solve already factorized expressions like: 0=(x^2 /12-log(2))*(x-1)(x+3).

Try it out is the website which this code is used on.


  • JQuery
  • MathQuill
  • A browser that supports the html5 canvas tag.

More information about this application.


  • 1.6M+ functions graphed.

Known Bugs

  • Some of the derivitives it finds are incorrect.
  • Cannot solve x+x=0, but can solve 2x=0.

Things planned

  • Access external data? csv, fft, images, stock market data
  • 3D! the whole graph thing rotates in an animation to become a flat plane, and then the 3d function is plotted.


This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

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