[R] confint fails in quasibinomial glm: dims do not match

smith_cc smith_cc at yahoo.com
Fri Oct 2 04:29:28 CEST 2009

I am unable to calculate confidence intervals for the slope estimate in a
quasibinomial glm using confint(). Below is the output and the package info
for MASS. Thanks in advance!

R 2.9.2
MASS 7.2-48

> confint(glm.palive.0.str)
Waiting for profiling to be done...
Error: dims [product 37] do not match the length of object [74]
> glm.palive.0.str

Call:  glm(formula = cbind(alive, red) ~ str, family = quasibinomial,     
data = subset(master.palive, vtime == 0)) 

(Intercept)         strs  
       1.05         1.01  

Degrees of Freedom: 36 Total (i.e. Null);  35 Residual
Null Deviance:	    20800 
Residual Deviance: 16200 	AIC: NA 

> packageDescription("MASS")
Bundle: VR
Contains: MASS class nnet spatial
Priority: recommended
Version: 7.2-48
Date: 2009-07-29
Depends: R (>= 2.5.0), grDevices, graphics, stats, utils
Suggests: lattice, nlme, survival
Author: S original by Venables & Ripley. R port by Brian Ripley
<ripley at stats.ox.ac.uk>, following earlier work by Kurt Hornik and Albrecht
Maintainer: Brian Ripley <ripley at stats.ox.ac.uk>
BundleDescription: Functions and datasets to support Venables and Ripley,
'Modern Applied Statistics with S' (4th edition).
License: GPL-2 | GPL-3
URL: http://www.stats.ox.ac.uk/pub/MASS4/
Packaged: 2009-07-31 13:56:57 UTC; ripley
Repository: CRAN
Date/Publication: 2009-08-05 11:20:53
Package: MASS
Description: The main library and the datasets
Title: Main Package of Venables and Ripley's MASS
LazyLoad: yes
LazyData: yes
Built: R 2.9.2; i686-pc-linux-gnu; 2009-08-25 10:52:10 UTC; unix

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