20. Stackplots & Cumulative Area Streams

A stackplot draws multiple area series stacked on top of one another, visualizing both individual category trends and the macro total sum over time.

Mental Model Intuition

Geological rock layers stacked on top of each other over historical eras.

`plt.stackplot()` SyntaxSyntax

`plt.stackplot(x, y1, y2, y3, labels=..., colors=...)`.

Stackplots prevent visual clutter by eliminating overlapping line crossings.

plt.stackplot(x, y1, y2, labels=['A', 'B'])

Avoid the top errors and bad plotting practices that trip up new Python developers

Troubleshooting

Topic 20 • Python IDE

Python 3.12 • Matplotlib

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Objective Instructions:

Create a stackplot for `x=[1, 2, 3]`, `y1=[5, 10, 15]`, `y2=[2, 4, 6]` with `labels=['Series 1', 'Series 2']` and `colors=['#6366F1', '#00D9C0']`.

Required Keywords:✓ plt.stackplot✓ labels

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