Python Programs for visual representation of data

1. bars.py: How to plot multiple bars nest to each other. This code was used to generate results in square matrix-matrix multiplication report .
2. grouped_bar.py: Plot grouped bars in Python.
3. direction_field : Plots for direction field for -

a. y'(x) = x + sin(y)

b. y'(x) = x^2 - y

c. falling object