Generalized R-squared for detecting dependence.
Generalized R-squared for detecting dependence.
复制标题
DOI:
10.1093/biomet/asw071
复制
发表时间:
2017-03
期刊:
影响因子:
2.7
通讯作者:
Liu JS
中科院分区:
文献类型:
--
作者:
Wang X;Jiang B;Liu JS
Detecting dependence between two random variables is a fundamental problem. Although the Pearson correlation coefficient is effective for capturing linear dependence, it can be entirely powerless for detecting nonlinear and/or heteroscedastic patterns. We introduce a new measure, G-squared, to test whether two univariate random variables are independent and to measure the strength of their relationship. The G-squared statistic is almost identical to the square of the Pearson correlation coefficient, R-squared, for linear relationships with constant error variance, and has the intuitive meaning of the piecewise R-squared between the variables. It is particularly effective in handling nonlinearity and heteroscedastic errors. We propose two estimators of G-squared and show their consistency. Simulations demonstrate that G-squared estimators are among the most powerful test statistics compared with several state-of-the-art methods.
登录
查看更多内容
DOI:
10.1214/09-aoas312
发表时间:
2009-01-01
期刊:
The annals of applied statistics
影响因子:
--
作者:
Kosorok MR
通讯作者:
Kosorok MR
影响因子:
3.7
作者:
DOKSUM, K;BLYTH, S;ZHAO, HY
通讯作者:
ZHAO, HY
影响因子:
--
作者:
HOEFFDING, W
通讯作者:
HOEFFDING, W
影响因子:
1.3
作者:
Genest, C;Rémillard, B
通讯作者:
Rémillard, B
影响因子:
2.4
作者:
Kraskov, A;Stögbauer, H;Grassberger, P
通讯作者:
Grassberger, P