extras (version 0.10.0)

dskewlnorm: Skew-Lognormal Distribution

Description

The skew-lognormal distribution of a value x whose natural logarithm follows a Skew-Normal distribution with location meanlog, scale sdlog and shape. It reduces to the Log-Normal distribution when shape = 0.

Usage

dskewlnorm(x, meanlog = 0, sdlog = 1, shape = 0, log = FALSE)
pskewlnorm(q, meanlog = 0, sdlog = 1, shape = 0)
qskewlnorm(p, meanlog = 0, sdlog = 1, shape = 0)
rskewlnorm(n = 1, meanlog = 0, sdlog = 1, shape = 0)

Value

dskewlnorm gives the density, pskewlnorm gives the distribution function, qskewlnorm gives the quantile function, and rskewlnorm generates random deviates. pskewlnorm and qskewlnorm use the lower tail probability.

Arguments

x

A numeric vector of values.

meanlog

A numeric vector of the means on the log scale.

sdlog

A non-negative numeric vector of the standard deviations on the log scale.

shape

A numeric vector of values.

log

A flag specifying whether to return the log-transformed value.

q

A vector of quantiles.

p

A numeric vector of probabilities.

n

A non-negative whole number of the number of random samples to generate.

Examples

if (FALSE) { # rlang::is_installed("sn")
dskewlnorm(x = 1:5, meanlog = 0, sdlog = 1, shape = 0.1)
dskewlnorm(x = 1:5, meanlog = 0, sdlog = 1, shape = -1)
qskewlnorm(p = c(0.1, 0.4), meanlog = 0, sdlog = 1, shape = 0.1)
qskewlnorm(p = c(0.1, 0.4), meanlog = 0, sdlog = 1, shape = -1)
pskewlnorm(q = 1:5, meanlog = 0, sdlog = 1, shape = 0.1)
pskewlnorm(q = 1:5, meanlog = 0, sdlog = 1, shape = -1)
rskewlnorm(n = 3, meanlog = 0, sdlog = 1, shape = 0.1)
rskewlnorm(n = 3, meanlog = 0, sdlog = 1, shape = -1)
}