th,ks for your help, i don't have this package on my R, do you know an other package that have this test...thanks
Selon Renaud Lancelot <[EMAIL PROTECTED]>: > [EMAIL PROTECTED] a écrit : > > hello, > > > > I work since a few time on R and i wanted to know how to obtain the Wald > chi > > square value when you make a binary logistic regression. In fact, i have > the z > > value and the signification but is there a script to see what is the value > of > > Wald chi square. You can see my model below, > > Best regards, > > > > Séverine Erhel > > > If you want a global test for several coeff associated with the same > variable (e.g., form or criter2 in your example), you can fit the model > without the variable and compare the 2 models with a likelihood ratio > test (function anova): it is safer than the Wald test. > > If you really want the Wald test, it is available in different packages: > see for example the function wald.test in package aod. > > Best, > > Renaud > > > > > > > > > > > > [Previously saved workspace restored] > > > > > > > >>m3 = glm(reponse2 ~ form + factor(critere2) > ,family=binomial,data=mes.donnees) > >> summary (m3) > > > > > > Call: > > glm(formula = reponse2 ~ form + factor(critere2), family = binomial, > > data = mes.donnees) > > > > Deviance Residuals: > > Min 1Q Median 3Q Max > > -2.5402 0.2064 0.3354 0.4833 1.4177 > > > > Coefficients: > > Estimate Std. Error z value Pr(>|z|) > > (Intercept) 0.5482 0.3930 1.395 0.1631 > > form Illustration 3.2904 0.6478 5.080 3.78e-07 *** > > form Texte+illustration 2.6375 0.4746 5.557 2.74e-08 *** > > factor(critere2)2 -1.0973 0.5103 -2.150 0.0315 * > > factor(critere2)3 -0.9891 0.5107 -1.937 0.0528 . > > --- > > Signif. codes: 0 `***' 0.001 `**' 0.01 `*' 0.05 `.' 0.1 ` ' 1 > > > > (Dispersion parameter for binomial family taken to be 1) > > > > Null deviance: 227.76 on 218 degrees of freedom > > Residual deviance: 162.11 on 214 degrees of freedom > > AIC: 172.11 > > > > Number of Fisher Scoring iterations: 5 > > > > ______________________________________________ > > [email protected] mailing list > > https://stat.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html > > > > > -- > Dr Renaud Lancelot, vétérinaire > Projet FSP régional épidémiologie vétérinaire > C/0 Ambassade de France - SCAC > BP 834 Antananarivo 101 - Madagascar > > e-mail: [EMAIL PROTECTED] > tel.: +261 32 40 165 53 (cell) > +261 20 22 665 36 ext. 225 (work) > +261 20 22 494 37 (home) > ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
