Changing Alpha Of A Line In Seaborn Factorplot

import seaborn as sns sns.set(style='ticks') exercise = sns.load_dataset('exercise') g = sns.factorplot(x='time', y='pulse', hue='kind', data=exercise) In the code above, how can

Solution 1:

Find proper objects of FacetGrid axes with get_children() method and set alpha for lines and markers. To change marker property in legend (g._legend object) find suitable element of legendHandles and apply set_alpha() method:

import seaborn as sns
import matplotlib.pylab as plt

sns.set(style="ticks")
exercise = sns.load_dataset("exercise")
g = sns.factorplot(x="time", y="pulse", hue="kind", data=exercise)

# set alpha for marker (index 0) and for the rest line (indeces 3-6) 
plt.setp([g.ax.get_children()[0],g.ax.get_children()[3:7]],alpha=.5)

# modify marker in legend box
g._legend.legendHandles[0].set_alpha(.5)

plt.show()