% starting at the top and going down, data is from files:

% SP 15 IR /SP 16 IR /SP 17 IR /NP 15 IR /NP 16 IR /NP 17 IR 

% ave Spd Bias/ave Vec Diff/# pts used

       NaN        NaN          0
      0.50       2.06          1
      0.72       6.87          2
      0.23       0.98          4
      0.89       3.42         32
      2.39       4.90         22