How to move or remove the legend from a seaborn JointGrid or jointplot

Question:

How to remove the legend in the seaborn.JoingGrid plot?

The reference code is like below:

import matplotlib.pyplot as plt
import seaborn as sns

penguins = sns.load_dataset("penguins")

g = sns.JointGrid(data=penguins, x="bill_length_mm", y="bill_depth_mm", hue="species")
g.plot_joint(sns.scatterplot)
sns.boxplot(data=penguins, x=g.hue, y=g.y, ax=g.ax_marg_y)
sns.boxplot(data=penguins, y=g.hue, x=g.x, ax=g.ax_marg_x)

plt.show()

enter image description here

I have tried to use the following methods that are known to work on the other seaborn plots, but failed on the jointplot:

plt.legend([],[], frameon=False)
g._legend.remove()
Asked By: Hyunseung Kim

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Answers:

  • To remove the legend, the correct part of the sns.JointGrid must be accessed.
    • In this case g.ax_joint is where the legend is located.
  • As stated in a comment by mwaskom, Matplotlib axes have .legend (a method that creates a legend) and .legend_ (the resulting object). Don’t access variables that start with an underscore (_legend), because it indicates that they are private.
  • Tested in python 3.10, matplotlib 3.5.1, seaborn 0.11.2

sns.JointGrid

import seaborn as sns

penguins = sns.load_dataset("penguins")

g = sns.JointGrid(data=penguins, x="bill_length_mm", y="bill_depth_mm", hue="species")
g.plot_joint(sns.scatterplot)
sns.boxplot(data=penguins, x=g.hue, y=g.y, ax=g.ax_marg_y)
sns.boxplot(data=penguins, y=g.hue, x=g.x, ax=g.ax_marg_x)

# remove the legend from ax_joint
g.ax_joint.legend_.remove()

enter image description here

  • Moving the JointGrid legend can be done with sns.move_legend, as shown in this answer.
    • This also requires using g.ax_joint.
penguins = sns.load_dataset("penguins")

g = sns.JointGrid(data=penguins, x="bill_length_mm", y="bill_depth_mm", hue="species")
g.plot_joint(sns.scatterplot)
sns.boxplot(data=penguins, x=g.hue, y=g.y, ax=g.ax_marg_y)
sns.boxplot(data=penguins, y=g.hue, x=g.x, ax=g.ax_marg_x)

# move the legend in ax_joint
sns.move_legend(g.ax_joint, "lower right", title='Species', frameon=False)

enter image description here

With sns.jointplot

  • g.ax_joint.legend_.remove() can be used, but removing the legend is more easily accomplished by passing legend=False to the plot: sns.jointplot(..., legend=False).
  • g.ax_joint. is still required to move the legend.
penguins = sns.load_dataset("penguins")
g = sns.jointplot(data=penguins, x="bill_length_mm", y="bill_depth_mm", hue="species")

# remove the legend
g.ax_joint.legend_.remove()

# or 

# move the legend
# sns.move_legend(g.ax_joint, "lower right", title='Species', frameon=False)
Answered By: Trenton McKinney