Cokriging of variable Z1, accounting for secondary variables Z2,..., ZNv, requires the covariances (,) Ci, j(,).
LMC cokriging requires the knowledge of the covariances between any two locations , .
|covariance_matrix||is an object that represents a matrix. Expression mat(i,j) must be valid and return element (i,j) of the matrix (i and j are greater than or equal to 1), and the matrix must have a copy constructor. The elements of the covariance matrix must be models of Covariance|