FD.rightplot {FlexDir}

Right Triangle Plot of a Flexible Dirichlet

Description

Right triangle plot and contour lines of the density function of a fitted Flexible Dirichlet distribution.

Usage

FD.rightplot(x, var = c(1, 2), zoomed = T, showgrid = T, showdata = T,
  nlevels = 10)

Arguments

x

an object of class FDfitted, usually the result of FD.estimation.

var

numeric vector containing the two variables to be plotted on the axis.

zoomed

if TRUE, shows only the area where most of the density is concentrated. If FALSE, shows the whole area of the right triangle.

showgrid

if TRUE, shows the axis and the labels. If FALSE, only the graph is printed.

showdata

if TRUE, prints the data points. If FALSE, shows only the contour lines.

nlevels

approximate number of contour lines to be drawn.

Details

The number of variables in the fitted model must be 3 to draw a plot on the right triangle.

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. (2016) A structured Dirichlet mixture model for compositional data: inferential and applicative issues. Statistics and Computing, doi:10.1007/s11222-016-9665-y.

See Also

FD.estimation, FD.ternaryplot, FD.marginalplot

Examples

data <- FD.generate(n=20,a=c(12,7,15),p=c(0.3,0.4,0.3),t=8)
data
results <- FD.estimation(data, normalize=TRUE,iter.initial.SEM = 5,iter.final.EM = 10)
results
FD.rightplot(results)
FD.rightplot(results, var=c(3,2), zoomed=FALSE, showgrid=TRUE, showdata=FALSE, nlevels=3)