function code = opf_form(alg)%OPF_FORM    Which OPF formulation is used by alg.%   code = opf_form(alg) returns a formulation code given an algorithm code.%   The codes are:%       1 - standard, polynomial costs handled in the objective function%       2 - CCV, piece-wise linear costs handled via constrainted cost vars%       5 - generalized, includes both of above and more%   MATPOWER%   $Id: opf_form.m,v 1.4 2004/08/23 20:56:49 ray Exp $%   by Ray Zimmerman, PSERC Cornell%   Copyright (c) 1996-2004 by Power System Engineering Research Center (PSERC)%   See http://www.pserc.cornell.edu/matpower/ for more info.code = fix(alg / 100);return;