reliaR (version 0.01)

qq.exp.ext: Quantile versus quantile (QQ) plot for the Exponential Extension(EE) distribution

Description

The function qq.exp.ext() produces a QQ plot for the ExpExt based on their MLE or any other estimate. Also, a line going through the first and the third quartile can be sketched.

Usage

qq.exp.ext(x, alpha.est, lambda.est, main = " ", line.qt = FALSE, ...)

Arguments

x

vector of observations

alpha.est

estimate of the parameter alpha

lambda.est

estimate of the parameter lambda

main

the title for the plot

line.qt

logical; if TRUE, a line going by the first and third quartile is sketched.

...

additional arguments to be passed to the underlying plot function.

Value

The function qq.exp.ext() carries out a QQ plot for the Exponetial Extension.

References

Nikulin, M. and Haghighi, F.(2006). A Chi-squared test for the generalized power Weibull family for the head-and-neck cancer censored data, Journal of Mathematical Sciences, Vol. 133(3), 1333-1341.

See Also

pp.exp.ext for PP plot and ks.exp.ext function;

Examples

## Load data sets
data(sys2)
## Maximum Likelihood(ML) Estimates of alpha & lambda for the data(sys2)
## Estimates of alpha & lambda using 'maxLik' package
## alpha.est = 1.0126e+01, lambda.est = 1.5848e-04

qq.exp.ext(sys2, 1.0126e+01, 1.5848e-04, main = " ", line.qt = FALSE)