deviance residuals in binomial GLM (PR#399)
On Tue, 11 Jan 2000 faraway@umich.edu wrote:
Full_Name: Julian Faraway Version: .90.1 OS: Linux+NT Submission from: (NULL) (141.211.66.172) In the following example, the deviance residuals are not correctly calculated:
dead <- c(2,8,15,23,27) y <- cbind(dead,30-dead) conc <- 0:4 g <- glm(y ~ conc,family=binomial) residuals(g)
[1] -0.451015 0.359696 NaN 0.064302 -0.204493 Warning message: NaNs produced in: sqrt((object$family$dev.resids)(y, mu, wts)) The third residual should be zero.
Yes, and it is computed as sqrt(-5.169943e-21) on my machine. I have committed a fix for 0.99.0
Brian D. Ripley, ripley@stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272860 (secr) Oxford OX1 3TG, UK Fax: +44 1865 272595 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-devel-request@stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._