May 2024
Intermediate to advanced
200 pages
4h 57m
Japanese
Content preview from Python2年生 スクレイピングのしくみ 第2版 体験してわかる！会話でまなべる！
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LESSON
10
105
グラフで表示してみよう
個別のデータをグラフで表示する
これまでは、読み込んだすべてのデータでグラフ表示をしましたが、ある科目だけのグ
ラフや、
1人だけのグラフを表示するにはどうすればいいでしょうか。
1列のデータは、df["列名"]と指定すれば、1行のデータは、df.loc[行番号]と指定すれば
取得できます。その取得したデータを
DataFrameとして指定するだけで、個別のグラフが
作れるのです。「国語」だけの棒グラフ、「国語と数学」だけの棒グラフ、「
C子」だけの棒グ
ラフを作ってみましょう。また「
1列のデータ」であれば円グラフを作ることができます。
円グラフを作るには
DataFrame.plot.pie()です。
DataFrame（1列データ）.plot.pie(labeldistance=中心からの距離)
import pandas as pd
import matplotlib.pyplot as plt
plt.rcParams["font.family"] = "sans-serif"
plt.rcParams["font.sans-serif"] = ["Hiragino Maru Gothic Pro",
"Hiragino sans", "BIZ UDGothic", "MS Gothic"]
# CSV
ファイルを読み込む（名前の列をインデックスで）
df = pd.read_csv("test.csv", index_col=0)
#
国語の棒グラフ（水平）を作って表示する ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.