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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423
20
章
メニューバー
ここまでの章では、インタラクティブなノーベル賞可視化の視覚コンポーネントの作成方法を示
しました。年ごとの受賞者全員を表示する時系列グラフ、地理的分布を示す地図、現在選択してい
る受賞者を表示するリスト、そして国別の絶対数と
1
人当たりの受賞者数を比較する棒グラフで
す。本章では、ユーザがセレクタやボタン（図
20-1
を参照）でデータセットを絞り込んでそれを
視覚コンポーネントに反映することで可視化を操作する方法を説明します。例えば、受賞分野選択
ボックスフィルタで物理学賞を選ぶと、ノーベル賞可視化（
Nobel-viz
）要素に物理学賞受賞者だ
けを表示します。メニューバーのフィルタは累積的なので、例えばフランスの女性ノーベル化学賞
受賞者だけを選ぶことができます
†
。■
以降の節では、
D3
を利用してメニューバーを作成する方法と
JavaScript
コールバックを使って
ユーザドリブンの変更に対応する方法を示します。
20.1
D3
による
HTML
要素の作成
多くの人は、
D3
を線や円などのグラフィックスプリミティブからなる
SVG
可視化を作成する
専門ツールと考えています。
D3
は
SVG
可視化の作成に優れていますが（現時点では最高のツー
ルです）、テーブルや選択ボックスなどの従来の
HTML
要素の作成も同様に得意です。階層メ
ニューのような面倒で複雑なデータ駆動
HTML
では、
D3
のネストしたデータ結合がユーザの選
† 意外にも、マリ・キュリーとその娘イレーヌ・ジョリオ＝キュリーがこの条件を満たします。 ...
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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.