function result = issubset(a,b)% Determine whether or not the intersection of two linear constraint objects% exists.%% Syntax:%   "C = issubset(a,b)"%% Description:%   "issubset(a,b)" returns a "1" if  "a" a subset of "b" and%   "0" otherwise.%% Examples:%   Given two linear constraint objects, "a" representing a square in the%   x3 = 0 plane with corners at (x1,x2) pairs (2,1), (2,3), (4,3), and%   (4,1) and "b", another square in the same plane with corners at (2,1),%   (2,2), (3,1), and (3,2), %%%%   "C = issubset(a,b)"%%%%   returns "1".%% See Also:%   linearcon,and, isfeasibleif isa(b,'polyhedron')  b = linearcon(b);endif isa(b,'linearcon')  c = subseteq(a,b);else  c = 0;endresult = c;