Density, distribution function, quantile function and random generation for the Truncated Flipped Gamma distribution,
a Gamma distribution reflected across the Y-axis, and truncted at endpoints a, b. Support provided by the truncdist package
with all parameters available for a standard Gamma distribution. One additional parameter, offset is provided to
generate Truncated Flipped Gamma distributions with non-zero right endpoints, ending at the offset value.
Usage
dtgamma_flip(x, shape, rate = 1, offset = 0, a = 0, b = Inf, ...)
ptgamma_flip(
q,
shape,
rate = 1,
offset = 0,
a = 0,
b = Inf,
lower.tail = TRUE,
...
)
rtgamma_flip(n, shape, rate = 1, offset = 0, a = 0, b = Inf, ...)
qtgamma_flip(
p,
shape,
rate = 1,
offset = 0,
a = 0,
b = Inf,
lower.tail = TRUE,
...
)Arguments
- x
numeric vector of quantiles
- shape
shape parameter of gamma distribution
- rate
rate parameter of gamma distribution, default 1
- offset
offset of the right end of the distribution
- a
distribution start
- b
distribution end
- ...
additional parameters to be passed to truncdist::dtrunc, truncdist::ptrunc, truncdist::rtrunc and truncdist::qtrunc
- q
numeric vector of quantiles
- lower.tail
logical; if TRUE (default), probabilities are PX <= x, otherwise, PX > x
- n
number of observations
- p
vector of probabilities