| summary.ltm {ltm} | R Documentation |
Summary method for ltm objects
Description
Summarizes the fit of an ltm object.
Usage
summary.ltm(object, robust.se = FALSE, ...)
Arguments
object |
an object inheriting from class ltm. |
robust.se |
logical; if TRUE robust estimation of standard errors is used, based on the sandwich estimator. |
... |
additional argument; currently none is used. |
Value
An object of class summ.ltm with components,
coefficients |
the estimated coefficients' table. |
Var.betas |
the covariance matrix for the estimated parameters. |
logLik |
the log-likelihood of object. |
AIC |
the AIC for object. |
BIC |
the BIC for object. |
max.sc |
the maximum absolute value of the score vector at convergence. |
conv |
the convergence identifier returned by optim. |
counts |
the counts argument returned by optim. |
call |
the matched call of object. |
ltn.struct |
a character vector describing the latent structure used in object. |
control |
the values used in the control argument in the fit of object. |
nitems |
the number of items in the data set. |
See Also
ltm
Examples
## One factor model using the WIRS data
m <- ltm(Wirs~z1)
summary(m)
summary(m, TRUE)
[Package
ltm version 0.1-1
Index]