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.
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".
Note
The graph displayed uses a log scale for x. The log-log scale for y is
emulated via the construction of suitable graduations. So be careful when
adding graphical material (points, etc) to this graph with functions of
the "add to plot" family (points, lines, ...).
Author(s)
Yves Deville
See Also
The expplot function for an "exponential
distribution" plot (dedicated to the shape = 1 case), and
the fweibull function for ML estimation of the
parameters.
R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)
R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.
R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.
Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.
> library(Renext)
Loading required package: evd
> png(filename="/home/ddbj/snapshot/RGM3/R_CC/result/Renext/weibplot.Rd_%03d_medium.png", width=480, height=480)
> ### Name: weibplot
> ### Title: Classical Weibull distribution plot
> ### Aliases: weibplot
>
> ### ** Examples
>
> 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)
>
>
>
>
>
> dev.off()
null device
1
>