class="comment">%</span>
<span class="comment">% Consider the least-squares problem:</span>
<span class="comment">%       minimize ||(A + tB)x - b||_2</span>
<span class="comment">% where t is an uncertain parameter in [-1,1]</span>
<span class="comment">% Three approximate solutions are found:</span>
<span class="comment">%   1- nominal optimal (i.e. letting t=0)</span>
<span class="comment">%   2- stochastic robust approximation:</span>
<span class="comment">%           minimize E||(A+tB)x - b||_2</span>
