If you were to rtfm you'd see that your anova suggests that the slope coefficients are the same for your tau = .15 and tau = .30 models.
url: www.econ.uiuc.edu/~roger Roger Koenker email rkoen...@uiuc.edu Department of Economics vox: 217-333-4558 University of Illinois fax: 217-244-6678 Urbana, IL 61801 On Dec 5, 2011, at 1:18 AM, narendarreddy kalam wrote: > quantreg package is used. > *fit1 results are* > Call: > rq(formula = op ~ inp1 + inp2 + inp3 + inp4 + inp5 + inp6 + inp7 + > inp8 + inp9, tau = 0.15, data = wbc) > > Coefficients: > (Intercept) inp1 inp2 inp3 inp4 > inp5 > -0.191528450 0.005276347 0.021414032 0.016034803 0.007510343 > 0.005276347 > inp6 inp7 inp8 inp9 > 0.058708544 0.005224906 0.006804871 -0.003931540 > > Degrees of freedom: 673 total; 663 residual > *fit2 results are* > Call: > rq(formula = op ~ inp1 + inp2 + inp3 + inp4 + inp5 + inp6 + inp7 + > inp8 + inp9, tau = 0.3, data = wbc) > > Coefficients: > (Intercept) inp1 inp2 inp3 inp4 > -1.111111e-01 5.776765e-19 4.635734e-18 1.874715e-18 2.099872e-18 > inp5 inp6 inp7 inp8 inp9 > -4.942052e-19 1.111111e-01 2.205289e-18 4.138435e-18 9.300642e-19 > > Degrees of freedom: 673 total; 663 residual > > anova(fit1,fit2); > Quantile Regression Analysis of Deviance Table > > Model: op ~ inp1 + inp2 + inp3 + inp4 + inp5 + inp6 + inp7 + inp8 + inp9 > Joint Test of Equality of Slopes: tau in { 0.15 0.3 } > > Df Resid Df F value Pr(>F) > 1 9 1337 0.5256 0.8568 > Warning messages: > 1: In summary.rq(x, se = "nid", covariance = TRUE) : 93 non-positive fis > 2: In summary.rq(x, se = "nid", covariance = TRUE) : 138 non-positive fis > how to interpret the above results?? > > what is the use of anova function?? > will it give the best among fit1 && fit2.. > > > -- > View this message in context: > http://r.789695.n4.nabble.com/about-interpretation-of-anova-results-tp4159510p4159510.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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. ______________________________________________ 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.