pan class="string">'rx'</span>, <span class="string">'markersize'</span>, 14, <span class="string">'linewidth'</span>, 3)
<span class="comment">%plot(wtrue(1),wtrue(2),'bo', 'markersize', 14, 'linewidth', 3)</span>
<span class="comment">%plot([[-1;3],[1;1]],[[1;1],[-1;3]],'g-')</span>
hold <span class="string">off</span>
title <span class="string">'Sum of squares error contours for linear regression'</span>
axis <span class="string">equal</span>
axis <span class="string">square</span>
grid <span class="stri