October 2014
Intermediate to advanced
288 pages
6h 27m
Japanese
Content preview from 実践 機械学習システム
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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.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.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.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.
5.3
データを用意する
85
SVMやナイーブベイズなどがあります。これまでの章では、事例に基づく（instance-based）学習
†
を用いましたが、本章では、モデルベース（model-based）の手法であるロジスティック回帰を用いま
す。
5.3
データを用意する
幸いなことに、stackoverflowのチームが多くのデータを提供してくれています。それらのデータは
cc-wikiライセンスです。本書の執筆時点では、ダンプデータが
http://www.clearbits.net/
torrents/2076-aug-2012
††
よりダウンロードすることができます。そのページでは最新データの
リンクが示されていることでしょう。
対象のファイルをダウンロードし解凍すると、37GBのXMLファイルが現れます
‡
。ファイル構成は
次のようになります。
表5-1 ファイル一覧
ファイル名 サイズ（MB） 説明
badges.xml
309 ユーザのバッジ
comments.xml
3,225 質問や回答に対するコメント
posthistory.xml
18,370 編集履歴
posts.xml
12,272 質問と回答（これが必要なファイルです！）
users.xml
319 ユーザについての情報
votes.xml
2,200 投票についての情報
ここで必要なデータはposts.xmlファイルに含まれているので、その他のファイルは削除しても構いま
せん。posts.xmlファイルには、
posts
というタグが一つ存在します。
post ...
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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.