Sample finite-dimensional vectors to use as latent position vectors in random dot product graphs
Arguments
- n
Integer scalar, the sample size.
- alpha
Numeric vector, the vector of α parameter for the Dirichlet distribution.
Value
A dim
(length of the alpha
vector for
sample_dirichlet()
) times n
matrix, whose columns are the sample
vectors.
Details
sample_dirichlet()
generates samples from the Dirichlet distribution
with given α parameter. The sample is drawn from
length(alpha)-1
-simplex.
See also
Other latent position vector samplers:
sample_sphere_surface()
,
sample_sphere_volume()
Examples
lpvs.dir <- sample_dirichlet(n = 20, alpha = rep(1, 10))
RDP.graph.2 <- sample_dot_product(lpvs.dir)
colSums(lpvs.dir)
#> [1] 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1