 Usage:  y = armalik(x)  
 
 Input:

  x                      n-vector, the process 
                         
 Output:

  y                      list containing 1. the estimated parameters, 2. 
                         the corresponding asymptotic standard deviations, 
                         3. the asymptotic covariance, and 4. the 
                         estimate of the white noise variance 
                         
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(C) MD*TECH Method and Data Technologies, 17.8.2000
