CAS: A toy computer algebra system
============

Features:

CAS can differentiate and plot many symbolic expressions (e.g., x^2,
sin(x), etc.) and integrate a few (namely, polynomials and the three basic trig
functions). The differentiator knows about algebraic expressions, plus the
basic trigonometric (sin, cos, tan)  and exponential (exp) functions.

Please bear in mind that CAS is a work in progress -- there will be some bugs,
and it isn't feature-complete. However, it will improve with time.

Usage:

Note: To use CAS, you will need Python 3 and gnuplot.
Here is a usage example:

     from cas import *
     
     f = Expr('sin(x)')
     print(f)
     f.plot(title='Sine', labels=('x', 'sin(x)'), range=((0,6.28), (-1,1)))
     
     print(f.d('x'))
     f.d('x').plot(title='Cosine', range=((0,6.28), (-1,1)))
     
     print(f.integrate('x'))
     f.integrate('x').plot(title='Negative Cosine', range=((0,6.28), (-1, 1)))