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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401
18.4 要素を組み合わせる
18.4
要素を組み合わせる
これまでに説明した
projection
、
path
、
graticule
コンポーネントを使って、基本的な地図を
作成します。この地図はユーザイベントに対応し、選択した受賞者の国をハイライトし、国の中心
の赤で塗りつぶされた丸で受賞者数を示します。このインタラクティブな更新に別々に対応しま
す。
例
18-5
は、基本的な世界地図を作成するために必要なコードを示しています。このコードは
すっかり見慣れたパターンに従い、
div
コンテナ（
id
が
nobel-map
）から
mapContainer
を取得して
<svg>
タグを追加し、続いて
SVG
要素を追加します。この例では、
SVG
要素は
D3
が生成した地
図パスです。
この地図には、データ変更とは無関係で
nbviz.initMap
初期化メソッドの外側で定義される固定
コンポーネントがあります。
nbviz.initMap
は、サーバからのデータで可視化を初期化するときに
呼び出します。
nbviz.initMap
は
TopoJSON
world
オブジェクトを受け取り、それを使って
path
オブジェクトで基本的な地図を作成します。図
18-4
にその結果を示します。
例
18-5
基本地図の作成
//
大きさと
SVG
var mapContainer = d3.select('#nobel-map');
var boundingRect = mapContainer.node().getBoundingClientRect();
var ...
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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.