| summary.zeroinfl {pscl} | R Documentation |
summary method for class "zeroinfl"
## S3 method for class 'zeroinfl':
summary(object, ...)
## S3 method for class 'summary.zeroinfl':
print(x,
digits = max(3, getOption("digits") - 3),
...)
object |
an object of class "zeroinfl", usually a result of a
call to zeroinfl |
x |
an object of class "summary.zeroinfl", usually a
result of a call to summary.zeroinfl |
digits |
the number of significant digits to use when printing |
... |
further arguments passed to or from other methods |
print.summary.zeroinfl tries to be smart about formatting the
display of the MLEs, standard errors, etc, essentially using the same
code as appears in link{print.summary.lm}
The function summary.zeroinfl computes and returns a list of
summary statistics from the zero-inflated regression model, including
coefficents |
a matrix, with columns for the MLEs, their standard errors, z-statistic, and corresponding (two-sided) p-value. |
vc |
The estimated variance-covariance matrix of the MLEs |
beta |
The MLEs from the count component of the model |
gamma |
The MLEs from the zero-inflated component of the model |
theta |
If a zero-inflated negative binomial model is fit, the MLE of the over-dispersion parameter |
llh |
The value of the log-likelihood function at the MLEs |
Simon Jackman <jackman@stanford.edu>
Methods are supplied for the generic functions link{coef} and
link{logLik}, for objects of class "zeroinfl".
data(bioChemists)
zip <- zeroinfl(count=art ~ .,
x = ~ fem + mar + kid5 + phd + ment,
z = ~ fem + mar + kid5 + phd + ment,
data=bioChemists,trace=TRUE)
summary(zip)
coef(zip)
logLik(zip)