Other matrix helpers:
check_correlation_matrix()
,
check_covariance_matrix()
,
check_transition_probability_matrix()
,
cov_to_chol()
,
diff_cov()
,
insert_matrix_column()
,
matrix_diagonal_indices()
,
sample_correlation_matrix()
,
sample_covariance_matrix()
,
sample_transition_probability_matrix()
,
stationary_distribution()