 Usage:  z = grid (x, h, n)   
 
 Input:

  x                      m x 1 x d1 x ... x dn array 
                         
  h                      m x 1 x d1 x ... x dn array 
                         
  n                      m x 1 x d1 x ... x dn array 
                         
 Output:

  z                      m x (n1*n2*...*nm) x d1 x ... x dn array 
                         
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(C) MD*TECH Method and Data Technologies, 17.8.2000
