MLE of the Cauchy distribution: MLE of the Cauchy distribution
Description
MLE of the Cauchy distribution.
Usage
cauchy.mle(x, tol = 1e-07)
Value
A list including:
iters
The number of iterations required for the Newton-Raphson to converge.
loglik
The value of the maximised log-likelihood.
param
The vector of the parameters.
Arguments
x
A numerical vector with data.
tol
The tolerance level up to which the maximisation stops set to 1e-09 by default.
Author
Michail Tsagris
R implementation and documentation: Michail Tsagris <mtsagris@uoc.gr>.
Details
Instead of maximising the log-likelihood via a numerical optimiser we have used a Newton-Raphson algorithm which
is faster. The Cauchy is the t distribution with 1 degree of freedom.
References
Johnson, Norman L. Kemp, Adrianne W. Kotz, Samuel (2005). Univariate Discrete Distributions (third edition).
Hoboken, NJ: Wiley-Interscience.