August 2015
Intermediate to advanced
272 pages
5h 46m
Japanese
Content preview from Think Stats 第2版 ―プログラマのための統計入門
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208
13 章 生存分析
groups
は、回答者を生年の年代別にまとめた
GroupBy
オブジェクトです。最初のルー
プでは、各グループの
HazardFunction
を計算します。
第二のループでは、
1
つ前の要素の値を使って
HazardFunction
を拡張し、さらに、
その前のグループの値をというふうに進めて、
HazardFunction
を
SurvivalFunction
に変換してプロットします。
図
13-5
に結果を示します。予測が見やすいように
50
年代のコホートを取り除き
ました。これらの結果からは、
40
歳になる前に、最近のコホートは
60
年代のコホー
トに収束して、結婚しない人は
20
％を下回ることが示されます。
図
13-5
異なる年代に生まれた回答者の生存率、若い世代のコホートでは予測が入っている
13.10
期待残存生存期間
生存曲線があれば、現在の年齢の関数として、期待残存生存期間を計算できます。
「
13.1
生存曲線」の妊娠期間の生存曲線から、出産までの期待時間を計算できます。
第
1
ステップは、生存期間の
PMF
を抽出することです。
SurvivalFunction
がそ
のメソッドを提供します。
年齢（歳）
60年代
70年代
80年代
90年代
209
209
13.10 期待残存生存期間
# class SurvivalFunction ...
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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.