dredge function error - R package MuMln

Question

I have to do statistical analyses on a data set. I would like to create all the possible models and to test them with the dredge function but it doesn\'t work. Indeed, when

Answer 1

I know this has been solved, however I came across the same issue and think there is a better way.

The issue with using options(na.action = "na.fail") is that it changes the global settings of R. If you have a large script changing the global settings will potentially impact on other sections of your code where you implicitly rely on R's default settings. There are two ways to avoid this:

1. After using dredge change the settings back via options(na.action = "na.omit").

OR the better way...

2. Utilise the regression function's ability to "set the argument". In your case:

glm1<-glm(presabs~dca1+dca2+se1+se2, family=binomial(logit), na.action = "na.fail")