weibplot: Classical Weibull distribution plot

Description

Plots a vector using Weibull distribution scales

Usage

weibplot(x,
            plot.pos = "exp",
            shape = NULL, scale = NULL,
            labels = NULL,
            mono = TRUE,
            ...)

Arguments

x: The vector to be plotted.
plot.pos: plotting position for points: either "exp" for expected ranks or "med" for a median rank approximation (see Details below).
shape: Shape parameter for one or several Weibull lines to be plotted.
scale: Scale parameter for one or several Weibull lines to be plotted.
labels: Text to display in legend when Weibull lines are specified.
mono: Monochrome graph.
...: Arguments to be passed to plot.

Author

Yves Deville

Details

This plot shows \(\log\{-\log[1-F(x)]\}\) against \(\log(x)\) where \(F(x)\) at point \(i\) is taken as \(i/(n+1)\) if plot.pos is "exp", or as the "median rank" approximation \((i-0.3)/(n+0.4)\) if plot.pos is "med".

Examples

Run this code

x <- rweibull(200, shape = 1.2, scale = 1)
weibplot(x, main = "Classical Weibull plot")
## Weibull lines
weibplot(x, shape = c(0.9, 1.3), scale = 1)
weibplot(x, shape = c(0.9, 1.3), scale = 1,
         labels = c("before", "after"))
weibplot(x, shape = c(0.9, 1.3), scale = 1,
         labels = c("before", "after"),
         mono = TRUE)