function n = number_of_faces(con)% Find the number of faces on the region represented by a linear% constraint object  %% Syntax:%   "n = number_of_faces(con)"%% Description:%   "number_of_faces(con)" returns the number of faces on the region%   represented by "con".  This is equivalent to the number of rows in%   the linear inequality matrix CI used to construct the linear%   constraint object.%% Examples:%   Given 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).%%%%     "n = number_of_faces(con)"%%%%   returns%%%%     "n = 4"%%%% See Also:%   linearcon,poly_facen = length(con.dI);return