KT_constraints adds constraints to account for the variations of the mean of the krigged variable Z. The mean is assumed to be of the form:
The kriging system at location u is then given by:
Kriging with trend is rarely used with secondary variables. Hence KT_constraints assumes no secondary variable is to be accounted for. KT_constraints computes the kriging system size, resizes the kriging matrix and the second member, computes the terms of the system that are associated with the constraints on the kriging weights and finally returns the system size.
|forward_iterator||is a model of Forward Iterator.|
double f(location u)
where location is a model of Location.