August 2017
Intermediate to advanced
500 pages
12h 3m
Japanese
Content preview from PythonとJavaScriptではじめるデータビジュアライゼーション
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225
10.3 pyplot のグローバル状態を使った対話型プロット
これで、
Matplotlib
プロットが
IPython
のワークフローに挿入されます。
Qt
や
Notebook
バー
ジョンでも同じです。
Notebook
では、プロットがアクティブなセルに組み込まれます。
プロットの修正
インラインモードでは、IPython のセルや（複数行）入力を実行した後に描画コンテキストを書き込
みます。つまり、古いセルや入力から
gcf
（get current fugure：現在の図の取得）メソッドを使っ
たプロットの変更はできないので、新しい入力やセルで追加や修正を加えたすべてのプロットコマン
ドを再度行う必要があります。
10.3
pyplot
のグローバル状態を使った対話型プロット
対話的なデータ探索に使う
pyplot
モジュールは、対話的に操作できるグローバル状態を提供し
ます
†
。
pyplot
モジュールは対話的なデータ探索に使うことを目的としています。通常は図が
1
つ
だけの単純なプロットを作成しているときに最適です。
pyplot
は便利なので、多くの例で使われ
ていますが、さらに複雑なプロットには（すぐ後で説明する）
Matplotlib
のオブジェクト指向
API
が真価を発揮します。グローバルプロットの使い方の例を示す前に、
pandas
の便利な
period_
range
メソッドを利用して表示するランダムデータを作成しましょう。
x = pd.period_range(pd.datetime.now(), periods=200, ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.