相关系数和R方的关系是什么？ - 知乎 “ In linear least squares multiple regression with an estimated intercept term, R^2 equals the square of the Pearson correlation coefficient between the observed y and modeled (predicted) f data values of the dependent variable ” 在带有截距项的线性最小二乘多元回归中， R^2 等于实测值 y 和拟合值 f 的相关系数