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线性回归中的R，R平方和调整后的R平方有什么区别？ - 知乎 线性回归中的r你指的是相关系数吧，就是用来描述两个变量的线性相关程度。r绝对值越大表示2个变量间的线性相关程度越高。 线性回归中的 R 2 是决定系数，表示自变量（可能有多个）对因变量的解释程度，可以理解为因变量y的波动（变异）有多少比例可以由自变量来解释。这个 R 2 = 1 S S E S S T
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