statsmodels/statsmodels — Issue #121: tsa arima_process arma2ar returns full length
Author: josef-pkt
Created: 2011-12-18 15:21:46+00:00
State: open
Labels: comp-tsa, type-bug

```
>>> from scikits.statsmodels.tsa.arima_process import arma2ar
>>> ar = arma2ar([1.], [1, 0.9], nobs=5)
>>> ar.shape
(100,)
```

shape should be (5,)