MLdegree -- ML-degree of a graphical model

Synopsis

Usage:

MLdegree(R)
Inputs:
- R, a ring, defined as a gaussianRing of Graph, or Digraph, or Bigraph, or MixedGraph
Outputs:
- an integer, the ML-degree of the model

Description

This function computes the ML-degree of a graphical model. It takes as input a gaussianRing of a Graph, or a Digraph, or a Bigraph, or a MixedGraph. It computes the degree of the score equation ideal given by scoreEquations with a random sample data matrix.

We compute the ML-degree of the 4-cycle:

i1 : G=graph{{1,2},{2,3},{3,4},{4,1}}

o1 = Graph{1 => {2, 4}}
           2 => {1, 3}
           3 => {2, 4}
           4 => {1, 3}

o1 : Graph

i2 : MLdegree(gaussianRing G)

o2 = 5

Ways to use MLdegree :

MLdegree(Ring)

For the programmer

The object MLdegree is a method function.