September 2014
Intermediate to advanced
236 pages
4h 17m
Japanese
Content preview from Think Bayes ―プログラマのためのベイズ統計入門
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54
■
5
章
オッズと加数
best_attr_cdf = three_exact.Max(6)
best_attr_pmf = best_attr_cdf.MakePmf()
ここで、
three_exact
は、前節で定義した通りである。結果を出力すると、少なくと
も
1
つの属性が
18
となる人物を生成する機会が
3%
となる。図5-2は分布を示す。
3 つの 6 面サイコロの和
図 5-2 3 つのサイコロを 6 回振った最大値の分布
5.6
混合
Dungeons & Dragons
の例題をもう
1
つ試してみよう。次のようなサイコロの入った
箱を持っていたと仮定しよう。
5 4
面サイコロ
4 6
面サイコロ
3 8
面サイコロ
2 12
面サイコロ
1 20
面サイコロ
この箱から
1
つサイコロを取り出して振る。結果の分布はどのようになるだろうか。
5.6
混合
■
55
それがどの種類のサイコロかわかっていれば答えは簡単だ。
n
面サイコロは、
1
から
n
までの両端を含んだ一様分布となる。
しかし、どのサイコロかわからない場合、結果の分布は異なった値域を持つ一様分
布の混合（
mixture
）となる。一般に、この種の混合は単純な数学的モデルに適合しな
いが、
PMF
形式で分布を計算できる。
いつものようにオプションとして、シナリオをシミ
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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.