Uses Newton-Raphson to estimate the parameters of the Birnbaum--Saunders distribution.
The parameter mu
is set to 0
, hence only alpha
and beta
are estmated.
mlfatigue(x, na.rm = FALSE, ...)
mlfatigue
returns an object of class
univariateML
.
This is a named numeric vector with maximum likelihood estimates for
alpha
and beta
, with mu=0
, and the following attributes:
model
The name of the model.
density
The density associated with the estimates.
logLik
The loglikelihood at the maximum.
support
The support of the density.
n
The number of observations.
call
The call as captured my match.call
a (non-empty) numeric vector of data values.
logical. Should missing values be removed?
reltol
is the relative accuracy requested, defaults
to .Machine$double.eps^0.25
. iterlim
is a positive integer
specifying the maximum number of iterations to be performed before the
program is terminated (defaults to 100
).
For the density function of the Birnbaum--Saunders distribution see BirnbaumSaunders.
From, S. G., & Li, L. (2006). Estimation of the parameters of the Birnbaum<U+2013>Saunders distribution. Communications in Statistics: Theory and Methods, 35(12), 2157<U+2013>2169. https://doi.org/10.1080/03610920600853563