SSE R方 什么意思
时间: 2023-10-28 11:06:00 浏览: 203
SSE是指残差平方和(Sum of Squares of Errors),它是回归模型中观测值与回归线之间的差异的平方和。它衡量了模型无法解释的变异性。R方(R-squared)是用来评估回归模型的拟合优度的指标,它表示回归模型能够解释的总变异性的比例。R方的计算公式为R2 = SSR/SST,其中SSR是回归平方和(Sum of Squares of Regression),SST是总平方和(Total Sum of Squares)。R方的取值范围在0到1之间,越接近1表示模型对数据的拟合越好,越接近0表示模型对数据的拟合越差。
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