vcov.addreg {addreg} | R Documentation |
Returns the variance-covariance matrix of the main parameters of a fitted addreg
model object.
## S3 method for class 'addreg' vcov(object, ...)
object |
an object of class |
... |
additional arguments for method functions. |
An equivalent method to vcov
, to use with addreg
models.
A matrix of the estimated covariances between the parameter estimates in the linear or
non-linear predictor of the model. This should have row and column names corresponding
to the parameter names given by the coef
method.
If object$boundary == TRUE
, the standard errors of the coefficients
are not valid, and a matrix of NaN
s is returned.
Mark W. Donoghoe markdonoghoe@gmail.com
## For an example, see example(addreg)