weiplot {kdist}

Create Weibull Plot.

Description

A special type of plot where Weibull distributed data plots as a straight line. This was also originally called Rayleigh paper. Both Rayleigh and exponential distributions also plot as straight lines.

Usage

weiplot(data, n = 70, type = "p", xlim = NULL, ylim = c(0.01, 10),
  main = "Weibull Plot", sub = NULL, ylab = "log(1/1-F(x))",
  ylab2 = "F(x)", xlab = "x", percent = "False")

Arguments

data

data values from which a cumulative density function will be estimated using ecdf(data)

n

number of points required in plot (default n = 70).

type

plot type

xlim

the minimum and maximum to be used for the x-axis

ylim

the minimum and maximum to be used for the y-axis

main

the title of the plot

sub

the sub-title of the plot

ylab

the title of the left y-axis

ylab2

the title of the right y-axis

xlab

the title of the x-axis

percent

logical; display right hand axis as percentages

Details

A Weibull plot uses log paper and has log(1/(1-F(x)) versus x, where the data values x have an empirical cdf of F(x). The plot margins may need to be adjusted so that the right hand axis is visible.

See Also

weilines() adds lines to a Weibull plot

Examples

graphics::par(mar = c(5, 5, 5, 5))
r <- rexp(100000)
weiplot(r, xlim = c(1e-3, 10))
x <- 10^seq(-3, 2, length = 100)
weilines(x, pexp(x))