SETCOST

Reset classification cost matrix of mapping

    W = SETCOST(W,COST,LABLIST)

The classification cost matrix of the dataset W is reset to COST.  W has to be a trained classifier. COST should have size [C,C+1],  if C is the number of classes assigned by W.  COST(I,J) are the costs of classifying an object of class I as class J. Column C+1 generates an alternative reject class and  may be omitted, yielding a size of [C,C].  An empty cost matrix, COST = [] (default) is interpreted as  COST = ONES(C) - EYE(C) (identical costs of misclassification).

In LABLIST the corresponding class labels may be supplied.  LABLIST may have only class names of the existing labels assigned  by W, stored in W.LABELS.