Zageom {VGAM} | R Documentation |
Zero-Altered Geometric Distribution
Description
Density, distribution function, quantile function and random
generation for the zero-altered geometric distribution with
parameter pobs0
.
Usage
dzageom(x, prob, pobs0 = 0, log = FALSE)
pzageom(q, prob, pobs0 = 0)
qzageom(p, prob, pobs0 = 0)
rzageom(n, prob, pobs0 = 0)
Arguments
x , q |
vector of quantiles. |
p |
vector of probabilities. |
n |
number of observations.
If |
prob , log |
Parameters from the ordinary geometric distribution
(see |
pobs0 |
Probability of (an observed) zero, called |
Details
The probability function of Y
is 0 with probability
pobs0
, else a positive geometric(prob) distribution.
Value
dzageom
gives the density and
pzageom
gives the distribution function,
qzageom
gives the quantile function, and
rzageom
generates random deviates.
Note
The argument pobs0
is recycled to the required length,
and must have values which lie in the interval [0,1]
.
Author(s)
T. W. Yee
See Also
zageometric
,
zigeometric
,
rposgeom
.
Examples
prob <- 0.35; pobs0 <- 0.05; x <- (-1):7
dzageom(x, prob = prob, pobs0 = pobs0)
table(rzageom(100, prob = prob, pobs0 = pobs0))
## Not run: x <- 0:10
barplot(rbind(dzageom(x, prob = prob, pobs0 = pobs0),
dgeom(x, prob = prob)), las = 1,
beside = TRUE, col = c("blue", "orange"), cex.main = 0.7,
ylab = "Probability", names.arg = as.character(x),
main = paste("ZAG(prob = ", prob, ", pobs0 = ", pobs0,
") [blue] vs", " Geometric(prob = ", prob,
") [orange] densities", sep = ""))
## End(Not run)