maxLik: nIter – R documentation

Become an expert in R — Interactive courses, Cheat Sheets, certificates and more!

nIter

Return number of iterations for iterative models

Description

Returns the number of iterations for iterative models. The default method assumes presence of a component iterations in x.

Usage

nIter(x, ...)
## Default S3 method:
nIter(x, ...)

Arguments

`x`	a statistical model, or a result of maximisation, created by `maxLik`, `maxNR` or another optimizer.
`...`	further arguments for methods

Details

This is a generic function. The default method returns the component x$iterations.

Value

numeric, number of iterations. Note that ‘iteration’ may mean different things for different optimizers.

Author(s)

Ott Toomet

Examples

## Estimate the exponential distribution parameter:
t <- rexp(100, 2)
loglik <- function(theta) sum(log(theta) - theta*t)
## Estimate with numeric gradient and numeric Hessian
a <- maxNR(loglik, start=1)
nIter(a)

maxLik

Maximum Likelihood Estimation and Related Tools

v1.4-8

GPL (>= 2)

Authors

Ott Toomet <otoomet@gmail.com>, Arne Henningsen <arne.henningsen@gmail.com>, with contributions from Spencer Graves and Yves Croissant

Initial release

2021-03-22