 class="string">'linewidth'</span>,1)
    plot(l*sin(M(2)+err),-l*cos(M(2)+err),<span class="string">'b'</span>,<span class="string">'linewidth'</span>,2)
    plot(l*sin(M(2)),-l*cos(M(2)),<span class="string">'b.'</span>,<span class="string">'markersize'</span>,20)
  <span class="keyword">end</span>
<span class="keyword">catch</span>
<span class="keyword">end</span>

<span class="comment">% Draw useful information</span>
<span class="comment">% target location</span>
plot(0,l,<span class="string">'k+'</spa