Dear list,
I am needing to extract the estimate of overdispersion (deviance / residual
degrees of freedom or c-hat) from multiple model objects - so they can then be
used to compare the extent of overdispersion among alternative models as well
as calculate qausi-AIC values. I have been
summary(modeltest)@sigma
Toby Gardner wrote:
Dear list,
I am needing to extract the estimate of overdispersion (deviance / residual
degrees of freedom or c-hat) from multiple model objects - so they can then
be used to compare the extent of overdispersion among alternative models as
You can extract it from a summary.lmer object, which has a slot names
sigma that contains this scale parameter. For example,
sum.modeltest - summary(modeltest)
[EMAIL PROTECTED]
On 11/09/06, Toby Gardner [EMAIL PROTECTED] wrote:
Dear list,
I am needing to extract the estimate of
PS, the equivalent for a glm is:
sum.modeltest - summary(modeltest)
sum.modeltest$dispersion
Hope this helps.
On 11/09/06, Toby Gardner [EMAIL PROTECTED] wrote:
Dear list,
I am needing to extract the estimate of overdispersion (deviance / residual
degrees of freedom or c-hat) from
