求教：如何在散点图中加入回归直线

sysuse auto, clear

*散点图+线性拟合直线

twoway (scatter price wei) (lfit price w)

*散点图+二次拟合曲线

twoway (scatter price wei) (qfit price w)

*散点图+线性拟合直线+置信区间

twoway (scatter price wei) (lfit price w) (lfitci p w)

eblog  金币 +5  金钱 +100  魅力 +10  经验 +50  奖励 2009-2-11 20:32:10