greybox (version 1.0.3)

hm: Half moment of a distribution and its derivatives.

Description

hm function estimates half moment from some predefined constant C. ham estimates half absolute moment. Finally, asymmetry function returns asymmetry coefficient, while extremity returns the coefficient of excess, both based on hm.

Usage

hm(x, C = mean(x), ...)
ham(x, C = mean(x), ...)
asymmetry(x, C = mean(x), ...)
extremity(x, C = mean(x), ...)

Arguments

x

A variable based on which HM is estimated.

C

Centring parameter.

...

Other parameters passed to mean function.

Value

A complex variable is returned for hm function and real values are returned for asymmetry and ham.

Details

NA values of x are excluded on the first step of calculation.

Examples

# NOT RUN {
x <- rnorm(100,0,1)
hm(x)
ham(x)
asymmetry(x)

# }