 Usage:  wts = wtsder(d,m,d1)  
 
 Input:

  d                      scalar , the dimension of the variable 
                         
  m                      d x 1 vector or scalar , discretization parameter 
                         
  d1                     scalar , the coordinate in which the derivative is 
                         calculated 
                         
 Output:

  wts                    k x 1 matrix , 
                         
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(C) MD*TECH Method and Data Technologies, 17.8.2000
