an class="comment">% (a figure is generated)</span>
<span class="comment">%</span>
<span class="comment">% Consider the least-squares problem:</span>
<span class="comment">%       minimize ||(A0 + u1*A1 + u2*A2)x - b||_2</span>
<span class="comment">% where u = [u1 u2]' is an uncertain parameter and ||u||_2 &lt;= 1</span>
<span class="comment">% Three approximate solutions are found:</span>
<span class="comment">%   1- nominal optimal (i.e. letting u=0)</span>
<span class="comment">%   2- Tikhonov Regulariz