Computes the derivative of the correlation matrix w.r.t. beta
combined_matList_partial_der(
matList,
link_matList,
tilde_G_inv_partial_beta,
interaction_effects = list()
)the derivative of the correlation matrix w.r.t. beta
a list of all matrices
not in use (could be removed)
derivative of G w.r.t. beta
list of vector pairs indicating interactions