如何将来自不同列的标记添加到 seaborn pandas 条形图

Question

I have the following dataset, code and plot:

import matplotlib.pyplot as plt
import seaborn as sns
import pandas as pd
data = [['tom', 10,15], ['matt', 13,10]]

df3 = pd.DataFrame(data, columns = ['Name', 'Attempts','L4AverageAttempts']) 

f,ax = plt.subplots(nrows=1,figsize=(16,9))
sns.barplot(x='Attempts',y='Name',data=df3)
plt.show()

How can get a marker of some description (dot, *, shape, etc) to show that tom has averaged 15 (so is below his average) and matt has averaged 10 so is above average. So a marker basxed off the L4AverageAttempts value for each person.

I have looked into axvline but that seems to be only a set number rather than a specific value for each y axis category. Any help would be much appreciated! thanks!

Answer 1

You can simply plot a scatter plot on top of your bar plot using L4AverageAttempts as the x value:

You can use seaborn.scatterplot for this. Make sure to set the zorder parameter so that the markers appear on top of the bars.

import seaborn as sns
import pandas as pd
data = [['tom', 10,15], ['matt', 13,10]]

df3 = pd.DataFrame(data, columns = ['Name', 'Attempts','L4AverageAttempts'])

f,ax = plt.subplots(nrows=1,figsize=(16,9))
sns.barplot(x='Attempts',y='Name',data=df3)

sns.scatterplot(x='L4AverageAttempts', y="Name", data=df3, zorder=10, color='k', edgecolor='k')

plt.show()