FAQ: Different Plot Types - Fill Between

[wiki-bot]

This community-built FAQ covers the “Fill Between” exercise from the lesson “Different Plot Types”.

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This exercise can be found in the following Codecademy content:

Data Science

Data Visualization in Python

FAQs on the exercise Fill Between

• When do we use fill-between for line graphs in Matplotlib?

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[aorchowski]

The alpha in plt.fill_between() just sets the transparency, correct? That’s what I saw when I tried different numbers. I was a little confused by the explanation.

[corepro76625]

From the example set by @lilpuggy in a previous exercise, you can also use numpy arrays instead of list comprehension to solve this:

import numpy as np

#your work here

ax = plt.subplot(1, 1, 1)

plt.plot(range(len(revenue)), revenue)
ax.set_xticks(months)
ax.set_xticklabels(month_names, rotation=30)

y_upper = np.array(revenue) + np.array(revenue)*0.1
y_lower = np.array(revenue) - np.array(revenue)*0.1
plt.fill_between(months, y_lower, y_upper, alpha=0.2)


plt.show()

Cheers!