weiplot function

Create Weibull Plot.

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.

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.

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))

See Also

weilines() adds lines to a Weibull plot