vcov.logbin {logbin} | R Documentation |
Calculate Variance-Covariance Matrix for a Fitted logbin Model Object
Description
Returns the variance-covariance matrix of the main parameters of a fitted logbin
model object.
Usage
## S3 method for class 'logbin'
vcov(object, ...)
Arguments
object |
an object of class |
... |
additional arguments for method functions. |
Details
An equivalent method to vcov
, to use with logbin
models.
Value
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.
Note
If object$boundary == TRUE
, the standard errors of the coefficients
are not valid, and a matrix of NaN
s is returned.
Author(s)
Mark W. Donoghoe markdonoghoe@gmail.com
See Also
Examples
## For an example see example(logbin)
[Package logbin version 2.0.5 Index]