The Geometric Distribution

Usage

dgeom(x, p)
pgeom(q, p)
qgeom(prob, p)
rgeom(n, p)

Value

These functions provide information about the geometric distribution with parameter p. dgeom gives the density, pgeom gives the distribution function, qgeom gives the quantile function, and rgeom generates random deviates.

The geometric distribution has density

p(x) = p {(1-p)}^{x}

for x = 0, 1, 2, \ldots

Examples

pp <- sort(c((1:9)/10, 1 - .2^(2:8)))
print(qg <- qgeom(pp, p = .2))
for(i in 1:2) print(qg <- qgeom(pgeom(qg, p=.2), p =.2))
Ni <- rgeom(20, p = 1/4); table(factor(Ni, 0:max(Ni)))