chebyball computes the largest possible ball inscribed in a polytope.
[xc,r] = chebyball(Constraint,options)
The typical use is as follows
sdpvar x y Box = -1 <= [x y] <= 1; [xc,r] = chebyball(Box); plot(Box); hold on plot((x-xc(1)^2 + (y-xc(2))^2 <= r^2,,'y')
The command solves a linear program, hence a linear programming solver must be available. If you want to control the selection of LP solver, you use the second options argument.