Labeling horizontal barplot with values in Seaborn

问题

I have a horizontal barplot, for example, a simplified version of the example from the seaborn documentation: https://seaborn.pydata.org/examples/horizontal_barplot.html

import seaborn as sns
import matplotlib.pyplot as plt

f, ax = plt.subplots(figsize=(6, 15))

crashes = sns.load_dataset("car_crashes").sort_values("total", ascending=False)

sns.barplot(x="total", y="abbrev", data=crashes,
            label="Total", color="b")

ax.set(xlim=(0, 24), ylabel="",
       xlabel="Automobile collisions per billion miles")


plt.show()

How can I get the bars labeled with the value for each bar?

I tried this approach for vertical bars ( How to add percentages on top of bars in seaborn?) , but it doesn't seem to work. Changing height to width doesn't have the effect I assumed it would.

for p in ax.patches:
    height = p.get_width()
    ax.text(p.get_y()+p.get_height()/2.,
            height + 3,
            '{:1.2f}'.format(height),
            ha="center")

I'm assuming the horizontal plot works differently?

回答1:

Got it, thanks to @ImportanceOfBeingErnest

This worked for me

for p in ax.patches:
    width = p.get_width()    # get bar length
    ax.text(width + 1,       # set the text at 1 unit right of the bar
            p.get_y() + p.get_height() / 2, # get Y coordinate + X coordinate / 2
            '{:1.2f}'.format(width), # set variable to display, 2 decimals
            ha = 'left',   # horizontal alignment
            va = 'center')  # vertical alignment

来源：https://stackoverflow.com/questions/49820549/labeling-horizontal-barplot-with-values-in-seaborn

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python

matplotlib

seaborn