ziweibull: Zero-inflated Weibull distribution

In RTMBdist: Distributions Compatible with Automatic Differentiation by 'RTMB'

Zero-inflated Weibull distribution

Description

Density, distribution function, and random generation for the zero-inflated Weibull distribution.

Usage

dziweibull(x, shape, scale, zeroprob = 0, log = FALSE)

pziweibull(q, shape, scale, zeroprob = 0, lower.tail = TRUE, log.p = FALSE)

rziweibull(n, shape, scale, zeroprob = 0)

Arguments

x, q	vector of quantiles
shape	positive shape parameter
scale	positive scale parameter
zeroprob	zero-inflation probability between 0 and 1.
log, log.p	logical; if TRUE, probabilities/ densities p are returned as \log(p).
lower.tail	logical; if TRUE, probabilities are P[X \le x], otherwise, P[X > x].
n	number of random values to return

Details

This implementation allows for automatic differentiation with RTMB.

Value

dziweibull gives the density, pziweibull gives the distribution function, and rziweibull generates random deviates.

Examples

x <- rziweibull(1, 1, 1, 0.5)
d <- dziweibull(x, 1, 1, 0.5)
p <- pziweibull(x, 1, 1, 0.5)

RTMBdist documentation built on April 1, 2026, 5:07 p.m.