ddc: Density function for univariate Davidian curves
In dcurver: Utility Functions for Davidian Curves
ddc R Documentation
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.
dcurver documentation built on Nov. 5, 2025, 5:08 p.m.
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| ddc | R Documentation |
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.
R Package Documentation
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We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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