dridgeline: Density along the ridgeline

In fpc: Flexible Procedures for Clustering

Density along the ridgeline

Description

Computes the density of a two-component Gaussian mixture along the ridgeline (Ray and Lindsay, 2005), along which all its density extrema are located.

Usage

dridgeline(alpha=seq(0,1,0.001), prop,
                          mu1, mu2, Sigma1, Sigma2, showplot=FALSE, ...)

Arguments

alpha	sequence of values between 0 and 1 for which the density is computed.
prop	mixture proportion of first component.
mu1	mean vector of component 1.
mu2	mean vector of component 2.
Sigma1	covariance matrix of component 1.
Sigma2	covariance matrix of component 2.
showplot	logical. If TRUE, the density is plotted against alpha.
...	further arguments to be passed on to plot.

Value

Vector of density values for values of alpha.

Author(s)

Christian Hennig [e-mail] https://www.unibo.it/sitoweb/christian.hennig/en/

References

Ray, S. and Lindsay, B. G. (2005) The Topography of Multivariate Normal Mixtures, Annals of Statistics, 33, 2042-2065.

Examples

  q <- dridgeline(seq(0,1,0.1),0.5,c(1,1),c(2,5),diag(2),diag(2))

fpc documentation built on Sept. 24, 2024, 9:07 a.m.