关于DOE 的问题
全因子实验显示主效应显著,但有弯曲。残差图确认发现自变量-残差图有弯曲。所以,应该增加该自变量的高阶项。
我的问题是怎样去增加这个高阶项?我想增加一个平方项,但不知怎样在现有数据基础上去做这个分析。
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Factorial Fit: Fm(kHz) versus Voltage, Time, Temp.
Estimated Effects and Coefficients for Fm(kHz) (coded units)
Term Effect Coef SE Coef T P
Constant 46.2682 0.01854 2496.19 0.000
Voltage -0.1225 -0.0612 0.02270 -2.70 0.027
Time -0.0565 -0.0282 0.02270 -1.24 0.249
Temp. -0.4165 -0.2082 0.02270 -9.17 0.000
S = 0.0642088 R-Sq = 92.08% R-Sq(adj) = 89.11%
Analysis of Variance for Fm(kHz) (coded units)
Source DF Seq SS Adj SS Adj MS F P
Main Effects 3 0.383341 0.383341 0.127780 30.99 0.000
Residual Error 8 0.032982 0.032982 0.004123
Curvature 1 0.012788 0.012788 0.012788 4.43 0.073
Lack of Fit 4 0.012218 0.012218 0.003054 1.15 0.473
Pure Error 3 0.007976 0.007976 0.002659
Total 11 0.416324
Estimated Coefficients for Fm(kHz) using data in uncoded units
Term Coef
Constant 48.5787
Voltage -0.245000
Time -0.00282500
Temp. -0.0138833
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我的问题是怎样去增加这个高阶项?我想增加一个平方项,但不知怎样在现有数据基础上去做这个分析。
=======================================
Factorial Fit: Fm(kHz) versus Voltage, Time, Temp.
Estimated Effects and Coefficients for Fm(kHz) (coded units)
Term Effect Coef SE Coef T P
Constant 46.2682 0.01854 2496.19 0.000
Voltage -0.1225 -0.0612 0.02270 -2.70 0.027
Time -0.0565 -0.0282 0.02270 -1.24 0.249
Temp. -0.4165 -0.2082 0.02270 -9.17 0.000
S = 0.0642088 R-Sq = 92.08% R-Sq(adj) = 89.11%
Analysis of Variance for Fm(kHz) (coded units)
Source DF Seq SS Adj SS Adj MS F P
Main Effects 3 0.383341 0.383341 0.127780 30.99 0.000
Residual Error 8 0.032982 0.032982 0.004123
Curvature 1 0.012788 0.012788 0.012788 4.43 0.073
Lack of Fit 4 0.012218 0.012218 0.003054 1.15 0.473
Pure Error 3 0.007976 0.007976 0.002659
Total 11 0.416324
Estimated Coefficients for Fm(kHz) using data in uncoded units
Term Coef
Constant 48.5787
Voltage -0.245000
Time -0.00282500
Temp. -0.0138833
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ophylia (威望:1) (广东 广州) 在校学生 经理 - 习百家真言,悟变化之道
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yanjacky 这个人的照片,张的真帅。按卦书上显示是富贵相啊,是不是真人照片?