gendist (version 2.0)

dfolded: Probabilty density function of folded model.

Description

Computes pdf of the folded model.

Usage

dfolded(x, spec, arg, log = FALSE)

Arguments

x

scale or vector of values to compute the pdf.

spec

a character string specifying the parent distribution (for example, "norm" if the parent disstribution correspond to the normal).

arg

list of arguments/parameters of the parent distribution.

log

logical; if TRUE, log(pdf) are returned.

Value

An object of the same length as x, giving the pdf values computed at x.

Details

The pdf of folded model has a general form of: $$ f(x) = g(x) + g(-x) \quad x>0 $$ where \(G(x)\) is the cdf of parent distribution.

References

Abu Bakar, S. A., Nadarajah, S., Adzhar, Z. A. A. K., & Mohamed, I. (2016). gendist: An R package for generated probability distribution models. PloS one, 11(6). Brazauskas, V., & Kleefeld, A. (2011). Folded and log-folded-t distributions as models for insurance loss data. Scandinavian Actuarial Journal, 2011(1), 59-74.

Examples

# NOT RUN {
x=runif(10, min=0, max=1)
y=dfolded(x, spec="norm", arg=list(mean=1,sd=2) )

# }