 Usage:  {res,out} = linregres (x, y, yh)  
 
 Input:

  x                      n x p regressors 
                         
  y                      n x 1 
                         
  yh                     n x 1 
                         
 Output:

  xfs                    n x 4 
                         
  out                    n x 2 
                         
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(C) MD*TECH Method and Data Technologies, 17.8.2000
