Oapospois {VGAM}R Documentation

One-Altered Logarithmic Distribution

Description

Density, distribution function, quantile function and random generation for the one-altered positive-Poisson distribution with parameter pobs1.

Usage

doapospois(x, lambda, pobs1 = 0, log = FALSE)
poapospois(q, lambda, pobs1 = 0)
qoapospois(p, lambda, pobs1 = 0)
roapospois(n, lambda, pobs1 = 0)

Arguments

x, q, n, p

Same Unif.

lambda, log

Same as Otpospois).

pobs1

Probability of (an observed) one, called pobs1. The default value of pobs1 = 0 corresponds to the response having a 1-truncated positive-Poisson distribution.

Details

The probability function of Y is 1 with probability pobs1, else a 1-truncated positive-Poisson(lambda) distribution.

Value

doapospois gives the density and poapospois gives the distribution function, qoapospois gives the quantile function, and roapospois generates random deviates.

Note

The argument pobs1 is recycled to the required length, and must have values which lie in the interval [0,1].

Author(s)

T. W. Yee

See Also

oapospoisson, Oipospois, Otpospois.

Examples

lambda <- 3; pobs1 <- 0.30; x <- (-1):7
doapospois(x, lambda = lambda, pobs1 = pobs1)
table(roapospois(100, lambda = lambda, pobs1 = pobs1))

## Not run:  x <- 0:10
barplot(rbind(doapospois(x, lambda = lambda, pobs1 = pobs1),
                dpospois(x, lambda = lambda)),
        beside = TRUE, col = c("blue", "orange"), cex.main = 0.7, las = 1,
        ylab = "Probability", names.arg = as.character(x),
        main = paste("OAPP(lambda = ", lambda, ", pobs1 = ", pobs1,
                   ") [blue] vs",  " PosPoisson(lambda = ", lambda,
                   ") [orange] densities", sep = "")) 
## End(Not run)
[Package VGAM version 1.0-3 Index]