1. The problem statement, all variables and given/known data I have a matrix [11x10] which I want to solve (Ax=b). Matlab comes with an answer, but I would like to know if there is a possibility to give boundary conditions to this problem. like x_i can't be greater than 300 or something. is it possible to restrict the outcome? 2. The attempt at a solution I can't find any possibilities in the help.. and I can't think of anything to restrict the problem. thanks in advance.