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
4
128
グラフのある点を目立たせる
いろいろなグラフを描けるようになりましたので、もう少しグラフをわかりやすくする
方法も見てみましょう。
例えば、散布図にはたくさんの点がありますが、「この値は、この中のどこにあるんだろ
う？」などと思うことがあります。そんな「ある
1つの点を目立たせたいとき」には、「マー
カー」を表示させて目立たせることができます。マーカーを表示するには、グラフを表示
させたあとに、「
plt.plot(x座標, y座標, color="色", marker="マーカー", markersize=サイ
ズ）」 と命令して、マーカーを追加表示させることができます（グラフの種類によってでき
ない場合もあります）。マーカーは、
"o"（丸）、"X"（バツ）、"v"、"^"、"<"、">"（三
角）などの形を指定できます。
• 必要なライブラリ：pandas、matplotlib
•
命令
# グラフを表示するplotの命令
plt.plot(X座標, Y座標, color="色", marker="X", markersize=サイズ)
plt.show()
• 出力：グラフに目立つ1つの点を追加する
14
LESSON
重要な部分を目立たせるワザを身につけましょう。
グラフをわかりやすく
調整する
データ分析の命令：グラフに目立つ 1 つの点を追加する
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