As data frame method.
Usage
as.data.frame(x, row.names = NULL, optional = FALSE, ...)
# S4 method for theta,character,logical
as.data.frame(x, row.names = NULL, optional = FALSE, ...)
# S4 method for omega,character,logical
as.data.frame(x, row.names = NULL, optional = FALSE, ...)
# S4 method for sigma,character,logical
as.data.frame(x, row.names = NULL, optional = FALSE, ...)