The effects package can be used with many different classes of regression models beyond the basic models described in the Effect help page. The effSources function is used to tell an Effect method where to find the information to compute effects. Details are given in the vignette Regression Models Supported by the effects Package. Unless you are trying to extend effects to a different class of regression model, you will have no use for this function.
# S3 method for default
effSources(mod)# S3 method for gls
effSources(mod)
# S3 method for glmmPQL
effSources(mod)
# S3 method for rlmerMod
effSources(mod)
# S3 method for clm
effSources(mod)
# S3 method for clm2
effSources(mod)
# S3 method for clmm
effSources(mod)
# S3 method for betareg
effSources(mod)
See the vignette Regression Models Supported by the effects Package.
a fitted model object of the appropriate class. The default method works for many regression models for which there is no specific method.
John Fox jfox@mcmaster.ca, Sanford Weisberg sandy@umn.edu
Effect function methods by default expect regression objects to provide certain quantities, including a model formula, coefficient estimates, and the variance matrix of the estimates, in standard places. effSources methods return a list of the necessary quantities if they are not in standard places.