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:
modelThe name of the model.
densityThe density associated with the estimates.
logLikThe loglikelihood at the maximum.
supportThe support of the density.
nThe number of observations.
callThe 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