We provide convenient extensions of the [dpq]gamma
functions, which allow
the distribution to be specified in terms of its mean and standard deviation,
instead of shape and rate/scale.
qgamma(
p,
shape,
rate = 1,
scale = 1/rate,
lower.tail = TRUE,
log.p = FALSE,
mean,
sd
)dgamma(x, shape, rate = 1, scale = 1/rate, log = FALSE, mean, sd)
pgamma(
q,
shape,
rate = 1,
scale = 1/rate,
lower.tail = TRUE,
log.p = FALSE,
mean,
sd
)
vector of probabilities
see stats::GammaDist
mean and standard deviation, overriding shape
and
rate
or scale
if specified
vector of quantiles