">% in points;  marker size</span>

<span class="comment">% Input data</span>
fixed = [ 1   1  -1 -1    1   -1  -0.2  0.1; <span class="comment">% coordinates of fixed points</span>
          1  -1  -1  1 -0.5 -0.2    -1    1]';
M = size(fixed,1);  <span class="comment">% number of fixed points</span>
N = 6;              <span class="comment">% number of free points</span>

<span class="comment">% first N columns of A correspond to free points,</span>
<span class="comment">% last M columns correspond to fix