WeibullR (version 1.2.1)

plot.wblr: S3 wblr Object Plotting on pretty canvax

Description

This function adds the .wblr method to plot.default from the graphics package.

Currently, the function plots the (life-)time observations, fits (if any) and confidence bounds for B-lives (if any) of an wblr object or a list of wblr objects on Weibull or Lognormal probability paper.

For each fit in the (list of) wblr object(s), legends are added to the plot, displaying the fit parameters and (if available) goodness-of-fit indicators and confidence information.

Usage

# S3 method for wblr
plot(x, ...)

Value

Currently, the function returns no value.

Arguments

x

Object of class "wblr" or a list of wblr objects.

...

Options for plotting the wblr object; see section "Details".

Details

The ... argument can be any graphical parameter that can be supplied to plot.default, and any option that can be set by the function options.wblr. The options set in this way are applied to all graphical elements of the plot, overriding any previously supplied options.

One can pass a list of wblr objects to plot.wblr; in that case it is mandatory to use the full method name: plot.wblr(...) and not plot(...).

The calculated Weibull or Lognormal distribution fits are plotted on Weibull probability paper by default, but by passing the argument canvas = "lognormal" to the function, Lognormal paper is used.

When a list of wblr objects is passed, the plot window is generated with the options of the first wblr object in the list.

Graphical controls typically used with plot or plot.wblr:

canvas

The plotting canvas to be used. This does not necessarily have to match the fit distribution. Only "weibull" (default) or "lognormal" are recognized.

mar

Margins defaults to c(5.1,4.1,5.1,2.1),.

main

Title, defaults to "Probability Plot".

main.contour

Contour plot title defaults to "Contour Plot".

sub

Subtitle defaults to NULL.

sub.contour

Contour subtitle defaults to NULL.

xlim

Plot x limits override to be presented as a vector c(lo,hi), default NULL.

ylim

Plot y limits override to be presented as a vector c(lo,hi), default NULL.

xlab

X axis label defaults to "Time To Failure".

ylab

Y axis label defaults to "Unreliability [%]".

coordinate.text.size

default 0.7.

signif

Used to control display of numbers in Legend, default 4.

col.grid

Color for chart gridlines defaults "grey".

is.plot.grid

default TRUE.

is.plot.fit

default TRUE.

is.plot.pp

default TRUE.

is.plot.ppcoordinates

default FALSE.

is.plot.legend

default TRUE.

legend.position

default "bottomright". See legend Details.

legend.inset

default c(0,0). legend inset values are fractions of graph width and height.

legend.text.size

default 0.7.

label

defaults to "".

in.legend

default TRUE.

in.legend.blives

default TRUE.

in.legend.gof

default TRUE.

is.plot.cb

default TRUE.

persistent

default TRUE.

References

Jurgen Symynck, Filip De Bal, Weibull analysis using R, in a nutshell (New Technologies and Products in Machine Manufacturing Technology, Stefan cel Mare University of Suceava, 2010).

Jurgen Symynck, Filip De Bal, Monte Carlo pivotal confidence bounds for Weibull analysis, with implementations in R (New Technologies and Products in Machine Manufacturing Technology, Stefan cel Mare University of Suceava, 2011).

Examples

options.wblr(blives=0.1) # make the legend boxes a bit shorter...
da2 <- wblr.conf(wblr.fit(wblr(runif(5,10,100),col="red")))
da3 <- wblr.conf(wblr.fit(wblr(rweibull(5,2,1000),col="green4",pch=3)))
da4 <- wblr.conf(wblr.fit(wblr(rlnorm(5,log(500),log(2)),col="blue3",pch=8),
    dist="lognormal"))

if (FALSE) {
plot.wblr(list(da2,da3,da4),xlim=c(1,1e6),
    main="Uniformly distributed observations")
}