Z=a0+a1X+a2Y+a3X^2+a4XY+a5Y^2+e
其图应该是一立体三维图。参考文献请见附件(
楼主: 陌上小熊遇小兔
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[作图问题求助] 请问如何用STATA做出Ploynomial Regression的立体图 |
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