 Usage:  y = gauder (x, h, p)  
 
 Input:

  x                      n x 1 vector 
                         
  h                      scalar, bandwidth 
                         
  p                      scalar, order of derivative 
                         
 Output:

  y                      n x 1 matrix, Gaussian density derivatives 
                         
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(C) MD*TECH Method and Data Technologies, 17.8.2000
