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"""
Multiple bivariate KDE plots
============================
_thumb: .6, .45
"""
import seaborn as sns
import matplotlib.pyplot as plt
sns.set(style="darkgrid")
iris = sns.load_dataset("iris")
# Subset the iris dataset by species
setosa = iris.query("species == 'setosa'")
virginica = iris.query("species == 'virginica'")
# Set up the figure
f, ax = plt.subplots(figsize=(8, 8))
ax.set_aspect("equal")
# Draw the two density plots
ax = sns.kdeplot(setosa.sepal_width, setosa.sepal_length,
cmap="Reds", shade=True, shade_lowest=False)
ax = sns.kdeplot(virginica.sepal_width, virginica.sepal_length,
cmap="Blues", shade=True, shade_lowest=False)
# Add labels to the plot
red = sns.color_palette("Reds")[-2]
blue = sns.color_palette("Blues")[-2]
ax.text(2.5, 8.2, "virginica", size=16, color=blue)
ax.text(3.8, 4.5, "setosa", size=16, color=red)
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