Hi to all I think this is more an general question to GLMs.
The result was better in all prior GLMs when I admitted the non significant factors, but this is the first time that the result is worse than before. What could be the reason for that? glm(data1~data2+data3+data4+data5+data6,family="gaussian") The result: Coefficients: Estimate Std. Error t value Pr(>|t|) (Intercept) 3.3670852 0.8978306 3.750 0.000445 *** data2 0.0002623 0.0001168 2.245 0.029024 * data3 -0.9742336 0.5032712 -1.936 0.058337 . data4 0.0628245 0.1503066 0.418 0.677686 data5 -0.0438871 0.0740210 -0.593 0.555818 data6$ -0.0012216 0.0187702 -0.065 0.948357 if I test only or lm() of course glm(data1~data2,family="gaussian") Coefficients: Estimate Std. Error t value Pr(>|t|) (Intercept) 2.473e+00 2.787e-01 8.876 2.86e-12 *** data2 7.289e-05 7.485e-05 0.974 0.334 Kind regards Knut ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.