My solution.
if isempty(Aeq)
valueAeq = [];
else
valueAeq = ones(size(Aeq,1), 1);
end
if isempty(A)
valueA = [];
else
valueA = ones(size(A,1), 1);
string1 = [ ' ',num2str(A(1,1)),'x1)'];
end
lambda = struct('lower', ones(size(C,2),1), 'upper', ones(size(C,2),1), 'eqlin', valueAeq, 'ineqlin', valueA);
[xopt,zmin,exitflag,output2,lambda] = linprog(C,A,B,Aeq,Beq,LB1,[],[],options);
If someone knows how to do it better, I will be happy to see a solution.