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More Occam's Razor C to Java Translator Theory of Morality II


A relation plotter for teaching mathematics to children Free Stuff

Relation Plotter
Click on the screen-shot to enlarge

Abstract

This article explains a program that is intended to plot relations between two variables. This program generalises a function plotter program written by myself in 2006. On the right of this screen is a screen-shot of the program running. The program is freely available as a Windows Executable under the GNU General Public License. If you also want the C++ source code, then please email me.

1. How to use this program

The function plotter mentioned earlier could plot equations of the following form: y = f(x) whereas the relation plotter program can plot more general equations of the form g(x,y) = h(x,y) or equivalently g(x,y) = 0. The function in the screen-shot on the right was plotted by entering the following in the console at the bottom of the screen:

    x^3 - y^3 = 3*x*y

Features of the program include:

Because this program is intended for children, I have left out features that might be confusing to them.

2. Motivation for the program

While I was in high school I wrote a program in Microsoft Amiga Basic that could plot arbitrary real-valued functions of a real-valued variable, which I found useful to learn calculus. As my understanding of computer science was limited, it was necessary to change the source code of the program every time you wanted to print a different function. It is only now with my greater understanding that I am able to revisit this problem and rewrite the program in C++ so that it can compose functions at run-time.

3. How to download

This program is available as a Windows Executable The download size is approximately ½ megabytes, which should take just over 2 minutes to download on Dial-up Internet, and even less with broadband! This program was written using a cross-platform graphics library known as Allegro, so in theory it should be possible to compile this program on other platforms such as GNU/Linux and MacOS.

4. Version history

Version 1.0. First stable version.

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| Main Menu | Research Projects | Photo Album | Curriculum Vitae | The Greatest Artists |
| Email Address | Computer Games | Web Design | Java Training Wheels | The Fly (A Story) |
| Political Activism | Bob Dylan Quotes+ | My Life Story | Smoking Cessation | Other Links |
| Debugging Macros | String Class I | Linked List System I | Java for C Programmers | Naming Convention |
| String Class II | How I use m4 | Strings III | Symmetrical I/O | Linked Lists II |
| Run-Time Type Info | Virtual Methods | An Array System | Science & Religion | Submodes |
| Nested Packages | Memory Leaks | Garbage Collection | Internet & Poverty | What is Knowledge? |
| Limits of Evolution | Emacs Additions | Function Plotter | Romantic Love | The Next Big Thing |
| Science Fiction | Faster Compilation | Theory of Morality | Elisp Scoping | Elisp Advice |
| S.O.G.M. Pattern | Safe Properties | School Bullying | Charisma Control | Life and Death |
| Splitting Java | Multiple Ctors | Religious Beliefs | Conversation 1 | Conversation 2 |
| J.T.W. Language | Emacs Additions II | Build Counter | Relation Plotter | Lisp++ Language |
| Memory Leaks II | Super Constructors | CRUD Implementation | Order a Website Form | There Is An Afterlife |
| More Occam's Razor | C to Java Translator | Theory of Morality II
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