reliaR (version 0.2)

qq.logis.rayleigh: Quantile versus quantile (QQ) plot for the Logistic-Rayleigh(LR) distribution

Description

The function qq.logis.rayleigh() 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.logis.rayleigh(x, alpha.est, lambda.est, main = " ", line.qt = FALSE, ...)

Value

The function qq.logis.rayleigh() carries out a QQ plot for the Exponetial Extension.

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.

References

Lan, Y. and Leemis, L. M. (2008). The Logistic-Exponential Survival Distribution, Naval Research Logistics, 55, 252-264.

See Also

pp.logis.rayleigh for PP plot and ks.logis.rayleigh function;

Examples

## Load data sets
data(stress)
## Maximum Likelihood(ML) Estimates of alpha & lambda for the data(stress)
## Estimates of alpha & lambda using 'maxLik' package
## alpha.est = 1.4779388, lambda.est = 0.2141343

qq.logis.rayleigh(stress, 1.4779388, 0.2141343, main = " ", line.qt = FALSE)