Qgh_deriv: g-and-h Q derivative

In gk: g-and-k and g-and-h Distribution Functions

g-and-h Q derivative

Description

Derivative of the g-and-h Q function.

Usage

Qgh_deriv(
  z,
  A,
  B,
  g,
  h,
  c = 0.8,
  getR = FALSE,
  type = c("generalised", "tukey")
)

Arguments

z	A vector of normal quantiles.
A	Vector of A (location) parameters.
B	Vector of B (scale) parameters. Must be positive.
g	Vector of g parameters.
h	Vector of h parameters. Must be positive.
c	Vector of c parameters. Often fixed at 0.8 which is the default.
getR	When TRUE returns a faster partial calculation that has the same sign as the derivative (Used in checking parameter validity.)
type	Can be "generalised" (default) or "tukey".

Value

The derivative of the g-and-h Q function at p.

gk documentation built on Aug. 10, 2023, 5:06 p.m.