ddc {dcurver}

Density function for univariate Davidian curves

Description

Returns the density for a vector of x.

Usage

ddc(x, phi)

Arguments

x

vector of quantiles.

phi

Davidian curve parameters. A maximum of 10 parameters is allowed.

Examples

curve(ddc(x, 1.570789), -6, 6) # Approximately normal.

phi <- c(77.32, 78.51, 76.33, 77.16)
curve(ddc(x, phi), -6, 6) # A bimodal density.
integrate(ddc, phi = phi, lower = -Inf, upper = Inf) # Integrates to 1.