Directional (version 7.0)

Contour plot of a mixture of von Mises-Fisher distributions model: Contour plot of a mixture of von Mises-Fisher distributions model for spherical data only.

Description

Contour lines are produced of mixture model for spherical data only.

Usage

mixvmf.contour(u, mod)

Value

A plot including: The points and the contour lines.

Arguments

u

A two column matrix. The first column is the longitude and the second is the latitude.

mod

This is mix.vmf object, actually it is a list. Run a mixture model and save it as mod for example, mod = mix.vmf(x, 3).

Author

Michail Tsagris and Christos Adam.

R implementation and documentation: Michail Tsagris and Christos Adam .

Details

The contour plot is displayed with latitude and longitude in the axes. No Lambert projection is used here. This works for spherical data only which are given as longitude and latitude.

References

Kurt Hornik and Bettina Grun (2014). movMF: An R Package for Fitting Mixtures of von Mises-Fisher Distributions http://cran.r-project.org/web/packages/movMF/vignettes/movMF.pdf

See Also

vmf.kerncontour, vmf.contour, mixvmf.mle

Examples

k <- runif(2, 4, 20)
prob <- c(0.4, 0.6)
mu <- matrix( rnorm(6), ncol = 3 )
mu <- mu / sqrt( rowSums(mu^2) )
x <- rmixvmf(200, prob, mu, k)$x
mod <- mixvmf.mle(x, 2)
y <- euclid.inv(x)
mixvmf.contour(y, mod)