Contour plot of the Flexible Dirichlet distribution in S^2: Contour plot of the Flexible Dirichlet distribution in \(S^2\)
Description
Contour plot of the Flexible Dirichlet distribution in \(S^2\).
Usage
fd.contour(alpha, prob, tau, n = 100, x = NULL, cont.line = FALSE)
Arguments
alpha
A vector of the non-negative \(\alpha\) parameters.
prob
A vector of the clusters' probabilities. It must sum to one.
tau
The non-negative scalar \(tau\) parameter.
n
The number of grid points to consider over which the density is calculated.
x
This is either NULL (no data) or contains a 3 column matrix with compositional data.
cont.line
Do you want the contour lines to appear? If yes, set this TRUE.
Value
A ternary diagram with the points and the Flexible Dirichlet contour lines.
Details
The user can plot only the contour lines of a Dirichlet with a given vector of parameters,
or can also add the relevant data should they wish to.
References
Ongaro A. and Migliorati S. (2013). A generalization of the Dirichlet distribution.
Journal of Multivariate Analysis, 114, 412--426.
Migliorati S., Ongaro A. and Monti G. S. (2017). A structured Dirichlet mixture model
for compositional data: inferential and applicative issues. Statistics and Computing, 27, 963--983.