S4 methods for function vcov. As in the generic vcov S3 `stats' method, these methods extract variance-covariance estimates of parameter estimators, for the models fitted to Interval Data.
# S4 method for IdtNDE
vcov(object, selmodel=BestModel(object), …)
# S4 method for IdtSNDE
vcov(object, selmodel=BestModel(object), …)
# S4 method for IdtNandSNDE
vcov(object, selmodel=BestModel(object), …)
# S4 method for IdtMxNDE
vcov(object, selmodel=BestModel(object), group=NULL, …)
# S4 method for IdtMxSNDE
vcov(object, selmodel=BestModel(object), group=NULL, …)An object representing a model fitted to interval data.
Selected model from a list of candidate models saved in object.
Ther group for each the estimated parameter variance-covariance will be returned. If NULL (default), “vcov” will return a three-dimensional array with a matrix of the estimated covariances between the parameter estimates for each group at each level of the third dimension.
Additional arguments for method functions.
For the “IdtNDE”, “IdtSNDE” and “IdtSNDE” methods: a matrix of the estimated covariances between the parameter estimates. For the “IdtMxNDE”, and “IdtMxSNDE” methods: if argument “group” is set to NULL, a three-dimensional array with a matrix of the estimated covariances between the parameter estimates for each group at each level of the third dimension. If argument “group” is set to an integer, the matrix with the estimated covariances between the parameter estimates, for the group chosen.