June 2024
Intermediate to advanced
200 pages
4h 46m
Japanese
Content preview from Python2年生 データ分析のしくみ 第2版 体験してわかる！会話でまなべる！
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Chapter
6
184
※JupyterNotebookでは、マップ内にうまく数値を表示できない場合があります。
斜め部分は1なので一番明るい色になっていますが、その次に明るいのは「数学と理科」
で、相関が強いことがわかります。「数学と社会」「 理科と社会」は暗く、相関が弱いと感覚
的にわかります。
総当たりで表示させる散布図：散布図行列
「相関行列」は、「相関係数のすべての組み合わせを行列で表示させたもの」でしたが、
「散布図のすべての組み合わせを行列で表示させるもの」もあります。それが「散布図行
列」です。
seabornの「sns.pairplot(data=df)」という命令を使います。
• 必要なライブラリ：pandas、matplotlib、seaborn
•
命令
sns.pairplot(data=df)
plt.show()
• 出力：散布図行列
散布図行列で表示してみましょう（リスト6.9）。
出力結果
データ分析の命令：散布図のすべての組み合わせを行列で表示する
185
総当たりで表示させる散布図
LESSON
22
sns.pairplot(data=df)
plt.show()
すべての組み合わせの「散布図」が表示されました。「相関行列」と同じように斜め部分
は同じデータ同士なので、散布図の代わりにヒストグラムが表示されています。 ...
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