WeibullR (version 1.1.10)

MLEw3p: Quick Fit, Maximum Likelihood Estimation for weibull distribution in 3-parameters

Description

Determination of Weibull fitting parameters with third, translation parameter optimization. Result provided with goodness of fit measures with optional graphical display.

Usage

MLEw3p(x, s=NULL, bounds=FALSE, show=FALSE)

Arguments

x

A vector of failure data.

s

An optional vector of suspension data.

bounds

A logical argument defining whether confidence interval bounds should be calculated by pivotal analysis.

show

A logical argument defining whether a simple graphical output is desired.

Value

When the bounds argument is set to FALSE this function returns a vector with named elements for Eta, Beta, and LL (log-likelihood). Bounds are not determined for 3p models, hence any bounds argument is simply ignored.

Details

This function is intended to provide a simple casual method of standard weibull analysis based on default methods, without options.

References

William Q. Meeker and Luis A. Escobar, (1998) "Statistical Methods for Reliability Data", Wiley-Interscience, New York

Robert B. Abernethy, (2008) "The New Weibull Handbook, Fifth Edition"

John I. McCool, (2012) "Using the Weibull Distribution: Reliability, Modeling and Inference"

Examples

# NOT RUN {
failures<-c(90,96,30,49,82)
suspensions<-c(100,45,10)
fit<-MLEw3p(failures, suspensions)
# }