 Usage:  fh = denestp(x {,h {,K} {,d} })  
 
 Input:

  x                      n x p matrix, the data. 
                         
  h                      scalar or p x 1 vector, bandwidth. If not given, 
                         the rule of thumb bandwidth computed by denrotp 
                         is used (Scott's rule of thumb). 
                         
  K                      string, kernel function on [-1,1]^p. If not given, 
                         the product Quartic kernel "qua" is used. 
                         
 Output:

  d                      
  fh                     m x (p+1) matrix, the first p columns constitute 
                         a grid and the last column contains the density 
                         estimate on that grid. 
                         
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(C) MD*TECH Method and Data Technologies, 17.8.2000
