Displaying 3 results from an estimated 3 matches for "x1sq".
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x1q
2004 Apr 05
0
Selecting Best Regression Equation : leaps() in R and stepwise() in S+
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And my applied R codes are-
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> options(prompt=" R > " )
R > leafbrn1<-read.table("c:\\leafbrn.txt",header=T)
R > leafbrn.data1<-data.frame(leafbrn1)
R > attach(leafbrn.data1)
R > x1sq<-x1^2;x2sq<-x2^2;x3sq<-x3^2;x1x2<-x1*x2;x1x3<-x1*x3;x2x3<-x2*x3;
R > leafbrn <- cbind(leafbrn1,x1sq,x2sq,x3sq,x1x2,x1x3,x2x3)
R > detach(leafbrn.data1)
R > leafbrn.data<-data.frame(leafbrn)
R > attach(leafbrn.data)
R > X<-cbind(x1,x2,x3,...
2008 Aug 03
0
missing F statistic in anova.gam
...ce F Pr(>F)
1 3822.000 33970
2 3819.535 33921 2.465 49 2.2257 0.09578 .
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Signif. codes: 0 ?***? 0.001 ?**? 0.01 ?*? 0.05 ?.? 0.1 ? ? 1
> anova(EqQuad,EqGamAS,test="F")
Analysis of Deviance Table
Model 1: y2 ~ x1 + x1sq + x2 + x2sq + x1x2 + X
Model 2: y2 ~ s(x1) + s(x2) + X
Resid. Df Resid. Dev Df Deviance F Pr(>F)
1 3819.00000 33955
2 3819.53502 33921 -0.53502 34
Model 1: y2 ~ s(x1) + s(x2) + X
Model 2: y2 ~ X + s(x1, x2)
Resid. Df Resid. Dev...
2008 Aug 05
0
P values in non linear regression and singular gradients using nls
...ce F Pr(>F)
1 3822.000 33970
2 3819.535 33921 2.465 49 2.2257 0.09578 .
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Signif. codes: 0 ?***? 0.001 ?**? 0.01 ?*? 0.05 ?.? 0.1 ? ? 1
> anova(EqQuad,EqGamAS,test="F")
Analysis of Deviance Table
Model 1: y2 ~ x1 + x1sq + x2 + x2sq + x1x2 + X
Model 2: y2 ~ s(x1) + s(x2) + X
Resid. Df Resid. Dev Df Deviance F Pr(>F)
1 3819.00000 33955
2 3819.53502 33921 -0.53502 34
Model 1: y2 ~ s(x1) + s(x2) + X
Model 2: y2 ~ X + s(x1, x2)
Resid. Df Resid. Dev...