中さんとっちゃんはるにゃんとちょこっと乱数の話をしました。
どとねとのRandomクラスをべたっと使ったダイスツールが偏ってね？ 的な話で、線形合同法なら偏っちゃうかも？ 体感でわからないと思うけどなんて話してました。でもどとねとのRandomクラスは線形合同法じゃないんですね。
で、気になったので線形合同法とRandomクラスでてけとーなウィンドウにプロットしてみました。
上が線形合同法、下がRandomクラス (Knuthの減算アルゴリズム) です。
線形合同法ひどすぎるｗ
＃とかWLWのテストがてらくだばなをポスト。
フィードバック
# re: 乱数の分布が気になったからプロットしてみた
2009/11/17 4:10 by
私もRandomでは苦い思い出が。
Knuthの減算法でも、種次第では線形合同法並みにダメダメになります。
とくに種が小さいとダメな傾向にあります。
お試しを。
それと統計性にも問題があります。
サイコロを300回振った合計値を10000回プロット、とかするとまともな結果がでません。
まぁ気になるならメルセンヌツイスタつかいましょう。
# re: 乱数の分布が気になったからプロットしてみた
2009/11/17 8:10 by
線形合同法の右の方がひどいね～
やっぱり.NETのメルセンヌツイスターライブラリ持ってきた方がよさげか・・・
# re: 乱数の分布が気になったからプロットしてみた
2009/11/17 8:57 by
じーっと見つめているとチョウチョが浮かび上がってきます(たぶん
# re: 乱数の分布が気になったからプロットしてみた
2009/11/17 12:24 by
そうか、ステレオグラムだったのか！ｗ
# re: 乱数の分布が気になったからプロットしてみた
2009/11/17 13:28 by
乱数を視覚化するのっておもしろいですね。
プロットしていく過程が見れればさらにおもしろそうです！
あと、メルセンヌツイスタ大好きです！
# re: 乱数の分布が気になったからプロットしてみた
2009/11/17 21:33 by
もえあがーれー
もえあがーれー
ランダムー
可視化するとイメージしやすいですね！
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