 Usage:  myres = SPKRsurfls (np, xmat)  

 

 Input:



  np                     scalar - degree of the polynomial surface, an integer 

                         in the range 0..6 

                         

  xmat                   n x 3 - matrix of locations (x_i, y_i) [columns 1 & 2] and 

                         observations z_i [column 3] 

                         

 Output:



  res                    list - consisting of components 

                         x, y, z, np, f, r, beta, wz, minx, maxx, type -- 

                         

  x                      n x 1 - same as xmat[,1] 

                         

  y                      n x 1 - same as xmat[,2] 

                         

  z                      n x 1 - same as xmat[,3] 

                         

  np                     scalar - same as input value np 

                         

  f                      matrix - internal use only 

                         

  r                      matrix - internal use only 

                         

  beta                   matrix - (np + 1)(np + 2) / 2 coefficients 

                         

  wz                     matrix - internal use only 

                         

  minx                   1 x 3 - minimum of columns of xmat 

                         

  maxx                   1 x 3 - maximum of columns of xmat 

                         

  type                   string - "trls" 

                         

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(C) MD*TECH Method and Data Technologies, 21.9.2000

