翻訳と辞書 Words near each other ・ Biwabik ・ Biwabik Township, St. Louis County, Minnesota ・ Biwabik, Minnesota ・ Biwajima Station ・ Biwako ・ Biwako Broadcasting ・ Biwako Line ・ Biwako Quasi-National Park ・ Biwako Seikei Sport College ・ Biwat language ・ Biwater ・ Biwater F.C. ・ Biweekly ・ BiWeekly Eleven ・ Biweekly mortgage ・ Biweight midcorrelation ・ Biwer ・ Biwi Ho To Aisi ・ Biwi No.1 ・ Biwia ・ Biwia springeri ・ Biwong-Bane ・ Biwong-Bulu ・ Biwott ・ BIX ・ Bix (disambiguation) ・ Bix (film) ・ Bix (rock group) ・ Bix (website) ・ Bix 7 Road Race Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Biweight midcorrelation ： ウィキペディア英語版 Biweight midcorrelation In statistics, biweight midcorrelation (also called bicor) is a measure of similarity between samples. It is median-based, rather than mean-based, thus is less sensitive to outliers, and can be a robust alternative to other similarity metrics, such as Pearson correlation or mutual information. ==Derivation== Here we find the biweight midcorrelation of two vectors $x$ and $y$, with $i=1,2,\; \backslash ldots,m$ items, representing each item in the vector as $x\_1,\; x\_2,\; \backslash ldots,\; x\_m$ and $y\_1,\; y\_2,\; \backslash ldots,\; y\_m$. First, we define $\backslash operatorname(x)$ as the median of a vector $x$ and $\backslash operatorname(x)$ as the median absolute deviation (MAD), then define $u\_i$ and $v\_i$ as, :$$ \begin u_i &= \frac,\\ v_i &= \frac. \end Now we define the ''weights'' $w\_i^$ and $w\_i^$ as, :$$ \begin w_i^ &= \left(1-u_i^2\right)^2 I\left(1-|u_i|\right)\\ w_i^ &= \left(1-v_i^2\right)^2 I\left(1-|v_i|\right) \end where $I$ is the identity function where, :$$ I(x) = \begin1, & \text x >0\\ 0, & \text\end Then we normalize so that the sum of the weights is 1: :$$ \begin \tilde_i &= \frac}(x)) w_j^\right )^2}}\\ \tilde_i &= \frac}(y)) w_j^\right )^2}}. \end Finally, we define biweight midcorrelation as, :$$ \mathrm\left(x, y\right) = \sum_^m \tilde_i \tilde_i 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Biweight midcorrelation」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.