Generates a valid Gamma matrix with a given dimension
Arguments
- d
- Size of the matrix 
- ...
- Further arguments passed to - generate_random_spd_matrix()
See also
Other example generation functions:
generate_random_chordal_graph(),
generate_random_graphical_Gamma(),
generate_random_integer_Gamma(),
generate_random_model(),
generate_random_spd_matrix()