Hi everyone,


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Coefficients:

         ar1      ar2      ma1     ma2    sar1  intercept   drift

      1.5283  -0.7189  -1.9971  0.9999  0.3982     0.0288  -9e-04

s.e.  0.0869   0.0835   0.0627  0.0627  0.1305        NaN     NaN



sigma^2 estimated as 0.04383:  log likelihood = 4.34,  aic = 7.32

Warning message:

NaNs produced in: sqrt(diag(object$var.coef))

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What does this mean?


Thanks a lot!

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