Graphing Calculator

Installation

yarn install
Install node modules

Running

yarn start
Run in development mode

yarn build
Build for production

Features

• Expression parsing:

  • Support for latex using mathquill
  • Parse which variables the expression defines and depend on
  • Check if expression is valid
    • Gives each valid expression a distinct color
    • Weight each expression and sort the order in which they need to be evaluated to solve and dependency

• Expression evaluation:

  • Send expressions to a web worker
  • Expressions are evaluated using mathjs
  • Results are cached

• Displaying Results:

  • Results are converted to screen space and rendered using canvas
  • Move around by holding left click and dragging mouse
  • Zoom using scroll wheel

Plans

• Dynamic resolution based on graph complexity
• Find discontinuities
  • Previous version had this but it ran too slow to use in real time
• Floating precision
  • Change datatypes to something with more precision
• Saving/loading/sharing graphs