sample_dirichlet {igraph} R Documentation

Sample from a Dirichlet distribution

Description

Sample finite-dimensional vectors to use as latent position vectors in random dot product graphs

Usage

sample_dirichlet(n, alpha)


Arguments

 n Integer scalar, the sample size. alpha Numeric vector, the vector of \alpha parameter for the Dirichlet distribution.

Details

sample_dirichlet generates samples from the Dirichlet distribution with given \alpha parameter. The sample is drawn from length(alpha)-1-simplex.

Value

A dim (length of the alpha vector for sample_dirichlet) times n matrix, whose columns are the sample vectors.

Other latent position vector samplers: sample_sphere_surface(), sample_sphere_volume()
lpvs.dir    <- sample_dirichlet(n=20, alpha=rep(1, 10))