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Seaborn箱ひげ図の横軸を10のN乗表示にする

Last updated at Posted at 2022-05-12

箱ひげ図の横軸が数値で、1000000, 2000000, ... などとなっている場合に、1, 2, ... × 10^6 と表示したい。どうやらScalarFormatterではできないっぽい。

ここを参考に、seabornで自動設定されるx軸ラベルを取得して数値に変換し、1000000で割った。

python
import matplotlib.pyplot as plt
import seaborn as sns
import textwrap

fig, ax = plt.subplots(figsize=(8, 6))

sns.boxplot(x="Density", y="Ratio", data=df, color='lightgray')
texts = [textwrap.fill(t.get_text(), 10)  for t in ax.get_xticklabels()]
xlabels = [int(t)/10**6 for t in texts]
ax.set_xticklabels(xlabels) 
ax.set_xlabel("Density [$10^6$ cells/mL]")

こんな感じ(データはお見せできないのでx軸のみ)。
スクリーンショット 2022-05-12 17.29.42.png

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