Draws graphs using Python's matplotlib library
In order to use it you need to have Python 3 with matplotlib and numpy installed.
The idea is that you give the script a mathematical function, f(x), and it will draw a graph for it. In this particular program, the supplied function's syntax should be valid Python syntax. So for example, to draw a graph of x² you would have to write x**2, rather than something like x^2.
drawGraph.py simply contains the basic functions needed to draw graphs, drawGraph2.py can be used from the command-line and drawGraphGUI.py uses tkinter to invoke a GUI from which you can draw graphs.