Use clean method instead, for instance:

>> o = x13(y);
>> o.transform('function','log');
>> o.regression('variables','()');
..
>> o.run();
>> o.clean()

(cherry picked from commit 3b7413de5dee93413581f7e87cfe08d3eb16d2d8)

If exogenous variables (x) are not used.

TODO Handle the incompatibility of ARIMA and AUTOMDL commands in the same spc file.

It seems that the matlab documentation about datetime is
incorrect. This routine is unknown in R2015a (and R2015b acording to
Nikola Bokan). If matlab version is smaller than R2016a, we call
datestr instead.

Even if the option seems to be deprecated (not mentionned in the
Reference manual as of March 2016).

Only useful if x13 fails (otherwise the files are deleted).

Houtan Bastani authored Apr 07, 2017 and Stéphane Adjemian committed Apr 20, 2017

(cherry picked from commit cd4bfdcf)

Houtan Bastani authored Apr 06, 2017 and Stéphane Adjemian committed Apr 20, 2017

(cherry picked from commit 6b17c3de353d7202d4b47b7cc437063f4d542ad3)

(cherry picked from commit 41d10eb1)

Houtan Bastani authored Apr 06, 2017 and Stéphane Adjemian committed Apr 20, 2017

(cherry picked from commit 8decc584)

(cherry picked from commit bbcc68f3a70f37c1b2ce2384932d1b68f3c459f1)

(cherry picked from commit 244b4517bad98fadc80ce1aaf0dcdfd5b530c4fc)

Use X13 Census for estimation.

GENERAL RULE: Methods with trailing underscore do in place modifications of the
object, while methods without trailing underscore do a copy (and leave
the original object unchanged).

Also fixed some headers and unit tests + cosmetic changes.