Bookmark and Share

Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

st: Capture failing on xtmixed


From   "Adrian Sayers" <[email protected]>
To   <[email protected]>
Subject   st: Capture failing on xtmixed
Date   Mon, 28 Jan 2013 13:54:54 -0000

Hi,

Apologies for posting this again.

I have come across some odd behaviour.

I am attempting to capture xtmixed in a simulation study. However it doesn't
seem to be working properly

So i have :
capture noisily xtmixed     obs_ht  age_1 age_2 || id: age_1 age_2 ,
cov(unstruct)

it has trouble converging. And eventually gives the following error:
	
	Hessian is not negative semidefinite
	conformability error

and then stata exits (Aborts) the program.

I am not sure why it is just not being skipped, and the error code stored in
_rc as it should be. 

I have a feeling it is to do with some of the mata code.

Any ideas or suggestions for a work around or a proper fix would be greatly
appreciated.

I am running stata 12.1

Thanks

Adrian



*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/faqs/resources/statalist-faq/
*   http://www.ats.ucla.edu/stat/stata/


© Copyright 1996–2018 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   Site index