JP5075553B2 - 2×n型分割表の総数数え上げ処理装置 - Google Patents
2×n型分割表の総数数え上げ処理装置 Download PDFInfo
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- JP5075553B2 JP5075553B2 JP2007252144A JP2007252144A JP5075553B2 JP 5075553 B2 JP5075553 B2 JP 5075553B2 JP 2007252144 A JP2007252144 A JP 2007252144A JP 2007252144 A JP2007252144 A JP 2007252144A JP 5075553 B2 JP5075553 B2 JP 5075553B2
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Description
(1)観測データの分割表(例えば、図2または図3のような分割表)が得られる確率を求める、
(2)(1)の分割表と周辺分布が同じであり(1)の分割表よりもさらに偏ったデータをもつ他の分割表を列挙し、それぞれが得られる確率を求める、
(3)(1)と(2)の確率の総和を求める、
(4)(3)の総和を検定の有意水準と比較し、帰無仮説の棄却の可否を決める(「要因は独立でない(比率に差がある)」、または、「要因は独立である(比率に差がない)」の判断を行う)、
という計算手順をとる。
分割表総数計算処理部は、入力された分割表データから求めた行和データと列和データに基づき、行和データから得られる超平面内に含まれる格子点と、列和データから得られる閉区間の直積集合に含まれる格子点のうちで、超平面と直積集合との共通部分に含まれる格子点の数を、三角数の交代和の計算を用いて算出することにより、分割表の数を求める処理を行う。
超平面P:x1+x2+…+xn=R1
の上にあることと解釈できる。
閉区間(閉集合)の直積集合I:[0,C1]×[0,C2]×…×[0,Cn]
に含まれることと解釈できる。
半空間:Ej:={x∈X|xj>Cj} (1≦j≦n)
を定義すると、求める格子点の数は、超平面P上にある格子点の数から全てのEjからなる和集合に含まれる格子点の数を引いた残りである。
#(A∪B∪C)=#(A)+#(B)+#(C)−#(A∩B)―#(A∩C)−#(B∩C)+#(A∩B∩C)
という公式で示されるように、和集合をとる集合の個数の偶奇に応じて符号を変えた交代和で計算できる。これは3個よりも集合が多い場合も成立する。
#(P)−#(E1)−#(E2)−…−#(En)+#(E1∩E2)+#(E1∩E3)+…+#(En−1∩En)−#(E1∩E2∩E3)−#(E1∩E2∩E4)−…
という計算により求められる。
#(△P0Q0R0)−#(△P0Q1R1)−#(△P2Q0R2)−#(△P3Q3R0)+#(△FR1P3)
という三角形内の格子点数の交代和により求められる。ここで、2つの三角形の境界に含まれる格子点は除かずに残すよう計算することに注意する。
601 表示装置
602 キーボード
603 ポインティングデバイス
604 中央処理装置
605 プログラムメモリ
606 データメモリ
Claims (2)
- 三角数の計算法を利用して正確確率検定のための2×n型分割表の総数を数え上げる装置であって、
分割表データ入力処理部と、
分割表総数計算処理部と、
該分割表総数計算処理部の計算結果を出力する分割表総数出力処理部とを有し、
前記分割表総数計算処理部は、入力された分割表データから求めた行和データと列和データに基づき、行和データから得られる超平面内に含まれる格子点と、列和データから得られる閉区間の直積集合に含まれる格子点のうちで、前記超平面と前記直積集合との共通部分に含まれる格子点の数を、三角数の交代和の計算を用いて算出することにより、2×n型分割表の数を求める処理を行うことを特徴とする2×n型分割表の総数数え上げ装置。 - 請求項1に記載の2×n型分割表の総数数え上げ装置において、
許容できる計算時間を受け付ける計算時間受付処理部および許容できる近似範囲を受け付ける近似範囲受付処理部のいずれか一つ、または両方をさらに有することを特徴とする2×n型分割表の総数数え上げ装置。
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JP5075553B2 true JP5075553B2 (ja) | 2012-11-21 |
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US20190163722A1 (en) * | 2016-07-06 | 2019-05-30 | Nippon Telegraph And Telephone Corporation | Fisher's exact test calculation apparatus, method, and program |
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JP6534778B2 (ja) * | 2016-07-06 | 2019-06-26 | 日本電信電話株式会社 | 秘密計算システム、秘密計算装置、秘密計算方法、およびプログラム |
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