VGAM (version 0.9-1)

Rayleigh: The Rayleigh Distribution

Description

Density, distribution function, quantile function and random generation for the Rayleigh distribution with parameter a.

Usage

drayleigh(x, scale = 1, log = FALSE)
prayleigh(q, scale = 1)
qrayleigh(p, scale = 1)
rrayleigh(n, scale = 1)

Arguments

x, q

vector of quantiles.

p

vector of probabilities.

n

number of observations. Fed into runif.

scale

the scale parameter $b$.

log

Logical. If log = TRUE then the logarithm of the density is returned.

Value

• drayleigh gives the density, prayleigh gives the distribution function, qrayleigh gives the quantile function, and rrayleigh generates random deviates.

Details

See rayleigh, the VGAM family function for estimating the scale parameter $b$ by maximum likelihood estimation, for the formula of the probability density function and range restrictions on the parameter $b$.

References

Evans, M., Hastings, N. and Peacock, B. (2000) Statistical Distributions, New York: Wiley-Interscience, Third edition.

See Also

rayleigh, maxwell.

Examples

Scale <- 2; x <- seq(-1, 8, by = 0.1)
plot(x, drayleigh(x, scale = Scale), type = "l", ylim = c(0,1),
     las = 1, ylab = "",
     main = "Rayleigh density divided into 10 equal areas; orange = cdf")
abline(h = 0, col = "blue", lty = 2)
qq <- qrayleigh(seq(0.1, 0.9, by = 0.1), scale = Scale)
lines(qq, drayleigh(qq, scale = Scale), col = "purple", lty = 3, type = "h")
lines(x, prayleigh(x, scale = Scale), col = "orange")