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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207
207
13.9 外挿
• 1980
年代に生まれた女性は、
25
歳より前に結婚することはもっと稀である。
その後どうなるかは明らかではない。より多くのデータを得るには、
NSFG
の次のサイクルまで待たねばならない。
待っている間に、予測を行うことができます。
13.9
外挿
1970
年代のコホートの生存曲線は、
38
歳ぐらいで終わりです。
1980
年代のコホー
トでは、
28
歳で終わります。
1990
年代のコホートについては、ほとんどデータがあ
りません。
これらの曲線を、以前のコホートのデータを「借りる」ことで外挿できます。
HazardFunction
には、メソッド
extend
があって、他のより長い
HazardFunction
の
尻尾の部分をコピーします。
# class HazardFunction
def Extend(self, other):
last = self.series.index[-1]
more = other.series[other.series.index > last]
self.series = pandas.concat([self.series, more])
「
13.2
ハザード関数」で見たように、
HazardFunction
には、
t
からλ
(t)
に対応
付けする
Series
があります。
Extend
は、
self.series
の最後のインデックスである
last
を見つけ、
other
から
last
の後に来る値を選び、それを
self.series
に追加します。
各コホートの
HazardFunction ...
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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.