 Usage:  d = portmant(b,resva,tb,te,t,di,ord,adj,h,df,typ,ts,outp)  
 
 Input:

  b                      matrix 
                         
  resva                  matrix, variance of rediduals 
                         
  tb                     integer, (time) begin 
                         
  te                     integer, (time) end 
                         
  t                      integer, number of observation time points 
                         
  di                     integer, dimension of time series 
                         
  ord                    integer, order of series 
                         
  adj                    scalar, 1=if adjusted, 0=if not 
                         
  h                      integer, forecast horizon 
                         
  df                     integer, degrees of freedom 
                         
  typ                    integer, describing the model type 
                         
  ts                     matrix 
                         
  outp                   matrix 
                         
 Output:

  d                      matrix 
                         
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(C) MD*TECH Method and Data Technologies, 17.8.2000
