Scatterplots for outlier detection

A scatterplot is another handy method to identify outliers visually. Although it is usually used to plot two variables against each other to inspect their relationship, using the trick from the video, you can plot a scatterplot with only one variable to make the outliers stand out.

matplotlib.pyplot is loaded as plt. The data is available as prices.

This exercise is part of the course

Anomaly Detection in Python

View Course

Exercise instructions

Create a list of consecutive integers with the same length as prices.
Create a scatterplot with integers on the x-axis and prices on the y-axis.

Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

# Create a list of consecutive integers
integers = ____(____(prices))

plt.figure(figsize=(16, 8))

# Plot a scatterplot
plt.____(____, ____, c='red', alpha=0.5)
plt.show()

Edit and Run Code