变量相关分析常用方法

变量间相关性分析是日常数据分析和挖掘经常用到的一种技术,本表格汇总了不同类型变量进行相关性分析时所用到的方法。如pearson系数适合两个连续型变量,Spearman适合两个ordinal变量,Phi适合两个离散型变量等等。参考链接:https://www.slideshare.net/mpazhou/statistics-for-interpreting-test-scores-6251947

Types of Correlation Coefficients
Correlation Coefficient Types of Scales
Pearson product-moment Both scales interval (or ratio)
Spearman rank-order Both scales ordinal
Phi Both scales are naturally dichotomous (nominal)
Tetrachoric Both scales are artificially dichotomous (nominal)
Point-biserial One scale naturally dichotomous (nominal), one scale interval (or ratio)
Biserial One scale artificially dichotomous (nominal), one scale interval (or ratio)
Gamma One scale nominal, one scale ordinal

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