Contour plot of the alpha-folded model in S^2: Contour plot of the \(\alpha\)-folded model in \(S^2\)
Description
Contour plot of the \(\alpha\)-folded model in \(S^2\).
Usage
folded.contour(mu, su, p, a, n = 100, x = NULL, cont.line = FALSE)
Arguments
mu
The mean vector of the folded model.
su
The covariance matrix of the folded model.
p
The probability inside the simplex of the folded model.
a
The value of a for the \(\alpha\)-transformation.
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
The contour plot of the folded model appears.
Details
The \(\alpha\)-transformation is applied to the compositional data and then for a grid
of points within the 2-dimensional simplex the folded model's density is calculated and
the contours are plotted.
References
Tsagris M. and Stewart C. (2020). A folded model for compositional data analysis.
Australian and New Zealand Journal of Statistics, 62(2): 249-277.
https://arxiv.org/pdf/1802.07330.pdf