function con = linearcon(CE,dE,CI,dI)% Linear constraint object class constructor %% Syntax:%   "con = linearcon(CE,dE,CI,dI)"%%   "con = linearcon(C)"%%   "con = linearcon"%% Description:%   "linearcon(CE,dE,CI,dI)" returns a linear constraint object satisfying%   the linear equations CEx = dE and CIx <= dI.  If "C" is a linear%   constraint object, then "linearcon(C)" returns another linear%   constraint object using the constraints from "C".  A call to "linearcon"%   with no arguments returns an empty linear constraint object.%% Examples:%   The command sequence %%%%     "CE = [0 0 1]; dE = 0;"%%     "CI = [1 0 0;-1 0 0;0 1 0;0 -1 0]; dI = [4;-2;3;-1];"%%     "con = linearcon(CE,dE,CI,dI);"%%%%   constructs the linear constraint object "con" representing a square in%   the plane x3 = 0 with corners at (x1,x2) pairs (2,1), (2,3), (4,3), and%   (4,1).%% See Also:%   linearcon_dataif (nargin == 1) & isa(CE,'linearcon')  con = CE;elseif (nargin == 4)    if size(dE,1) > 1        aug = [CE, dE];        [R, jb] = rref(aug);        CE = CE(jb, :);        dE = dE(jb, :);    end      con.CE = CE;  con.dE = dE;  con.CI = CI;  con.dI = dI;  con = class(con,'linearcon');else  con.CE = [];  con.dE = [];  con.CI = [];  con.dI = [];  con = class(con,'linearcon');end