March 2022
Beginner to intermediate
360 pages
8h 6m
Japanese
Content preview from データビジュアライゼーションの基礎 ―明確で、魅力的で、説得力のあるデータの見せ方・伝え方
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212
19
章 色を使う際によくはまる落とし穴
白人と答えた人の割合
図
19-5
テキサス州の各郡において白人と答えた人の割合。レインボーカラースケールはデータの任意の特徴を目
立たせてしまう傾向があるため、連続的なデータの値を可視化するのに適したスケールではない。ここで
は、人口の約
75 %
が白人と答えた郡が目立ってしまっている。データソース：
2010
年アメリカ国勢調査
19.3
色覚異常を考慮しないデザイン
ビジュアライゼーションで使う色を選ぶときは常に、読み手には、何らかの色覚異常
＊
1
を持っている
人がかなりの割合で含まれるかもしれない、ということに留意する必要があります。大半の人にははっ
きりと異なって見える色であっても、色覚異常を持った読み手には判別できないかもしれません。し
かし、色覚異常を持った人は、文字通りあらゆる色を見ることができないというわけではありません。
通常はそうではなく、赤と緑（赤緑色覚異常）や青と緑（青黄色覚異常）など、特定の種類の色を判別
するのが困難なのです。技術用語では、これらの異常のうち赤と緑の知覚に関するものを
2
型
3
色覚
（
deuteranomaly
）や
2
型
2
色 覚（
deuteranopia
）（緑を知覚するのが困難な場合）、あるいは
1
型
3
色覚
（
protanomaly
）や
1
型
2
色 覚（
protanopia
）（赤を知覚するのが困難な場合）と呼び、青と黄色の知覚に
関するものを
3
型
3
色 覚（
tritanomaly
）や
3
型
2
色 覚（
tritanopia
）（青を知覚するの ...
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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.