 Usage:  {xfs,bfs,pvl} = linregfs (x, y {, alpha})  
 
 Input:

  x                      n x p regressor variables 
                         
  y                      n x 1 dependent variable 
                         
  alpha                  scalar level of testing 
                         
 Output:

  xfs                    n x q 
                         
  bfs                    q x 1 the estimated regression coefficients 
                         
  pvl                    q x 3 the returned p-values 
                         
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(C) MD*TECH Method and Data Technologies, 17.8.2000
