October 2017
Intermediate to advanced
480 pages
9h 49m
Japanese
Content preview from Rではじめるデータサイエンス
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354
20
章
purrr
と
broom
による多数のモデル
本章の内容は意欲的です。本書で初めてR を学ぶなら、本章では苦労するかもしれません。モデ
ル化、データ構造、イテレーションについて自分なりにしっかり理解している必要があります。わか
らなくても心配することはありません。本章を少し脇に置き、頭の体操の準備ができたらまたやり直
せばいいのです。
20.1.1
用意するもの
多数のモデルを処理するには、多数の（データ探索、ラングリング、プログラミングといった）
tidyverse
パッケージとモデル化を行う
modelr
を使います。
library(modelr)
library(tidyverse)
20.2
gapminder
多数の単純なモデルによる威力を実感するために、「
gapminder
」データを取り上げます。この
データは、スウェーデンの医師であり統計学者のHans Roslingによって世に広まりました。読者
が彼の名前を聞くのが初めてなら、本書を閉じて彼のビデ
オを見た方がよいでしょう。彼は素晴ら
しいデータプレゼンターであり、データを使って感動的な話をどうすればできるかを示してくれま
す。手始めとして、BBC と共同の短いビデオ（http://youtu.be/jbkSRLYSojo）がよいでしょう。他
に、TED talk の https://www.ted.com/talks/hans_rosling_shows_the_best_stats_you_ve_ever_
seen?langu ...
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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.