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
Exercise instructions
- Create a list of consecutive integers with the same length as
prices
. - Create a scatterplot with
integers
on the x-axis andprices
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()