[OSAB] Task 3: Add 0-axis lines to scatterplots

[robert]

This is one way to solve Task 3 in https://robertheaton.com/2019/04/14/open-source-for-advanced-beginners-1-bashplotlib/.

Test:

I ran:

from bashplotlib.scatterplot import plot_scatter

x_coords = [-10,-4,10,20,30]
y_coords = [-10,-2,18,20,30]
width = 10
char = 'x'
color = 'default'
title = 'Test Title'

plot_scatter(
    None,
    x_coords,
    y_coords,
    width,
    char,
    color,
    title)

and got:

[robert]

It's worth trying to understand how this double-loop works. It's not necessarily the best way to solve this problem, and there are many alternative approaches one could take. See if you can come up with some.