Plotting discrete variables as stacked bar charts

Currently, a somewhat contrived example of add_stacked_bars.

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import pandas as pd
from upsetplot import UpSet
from matplotlib import pyplot as plt
from matplotlib import cm

TITANIC_URL = 'https://raw.githubusercontent.com/datasciencedojo/datasets/master/titanic.csv'  # noqa
df = pd.read_csv(TITANIC_URL)
# Show UpSet on survival and first classs
df = df.set_index(df.Survived == 1).set_index(df.Pclass == 1, append=True)

upset = UpSet(df,
              intersection_plot_elements=0)  # disable the default bar chart
upset.add_stacked_bars(by="Sex", colors=cm.Pastel1,
                       title="Count by gender", elements=10)
upset.plot()
plt.suptitle("Gender for first class and survival on Titanic")
plt.show()


upset = UpSet(df, show_counts=True, orientation="vertical",
              intersection_plot_elements=0)
upset.add_stacked_bars(by="Sex", colors=cm.Pastel1,
                       title="Count by gender", elements=10)
upset.plot()
plt.suptitle("Same, but vertical, with counts shown")
plt.show()