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Elm Graphing Calculator

In a Team of 2
2016

Technologies

•Elm

An interactive graphing calculator written in Elm. This was a class project meant to serve as practice for functional programming. I built the frontend and parts of the backend, working in a team of 2. Using functional programming with Elm to draw the interface was a learning exercise; no CSS was used in the project.

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Source Code

Project Images

Elm Graphing Calculator screenshot 1

Project Details

  • A custom recursive parsing system that respects parentheses and the order of operations
  • Binary arithmetic operators are supported: +, -, *, / , ^
  • Graph mode toggle: when the "y=" string is shown in the INPUT panel, graph mode is toggled on; this means that the string in the INPUT panel will be graphed. Graph mode can either be toggled using the "y=" button or by including the variable x in the INPUT string.
  • A range interval is shown below the button layout; the buttons to either side either zoom in or zoom out on the displayed graph. We cap the maximum range at (-17,17); we cap the minimum range at (-1,1).