2021-02-18: Ver. 0.11.0
  * Some errors have been fixed.

2021-09-20: Ver. 0.10.0
  * Package is adapted to ARMA processes.

2021-09-08: Ver. 0.9.4
  * Description and manuals are updated.

2021-08-23: Ver. 0.9.3
  * Description and manuals are updated.

2019-02-16: Ver. 0.9.0
  * create PH1XBAR by revising PH1AND2XBAR