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]
Re: st: problem 0 likelihood ml
From
[email protected] (Jeff Pitblado, StataCorp LP)
To
[email protected]
Subject
Re: st: problem 0 likelihood ml
Date
Fri, 16 Nov 2012 11:36:27 -0600
Olivier Francois <[email protected]> is using -ml check- while specifying
more than one technique:
> The probit now works, but I still have the problem if I list more than one technique.
>
> The code has become the following:
>
> //creating the data
> clear
> set more off
> set seed 12345
> set obs 1000
> matrix C = I(4)
> drawnorm z v e x, corr(C)
> replace z = sqrt(2)*z
> scalar a0 = 2
> scalar a1 = -1
> gen D = (a0 + a1*z > v)
> gen Y = 0.5 - 0.5*x + e
>
> //Probit model
> capture program drop myprobit
> program myprobit
> version 11.2
> args lnf xgam
>
> quietly {
> replace `lnf' = ln(normal(-`xgam')) if $ML_y1 == 0
> replace `lnf' = ln(normal(`xgam')) if $ML_y1 == 1
> }
> end
>
> ml model lf myprobit (xgam: D = z), vce(robust) technique(nr bhhh)
> ml check
>
> /*It works fine with just one technique (any), but come back with the following error if I combine more than one technique:
> opt__eval_cycle(): 3301 subscript invalid
> opt__eval(): - function returned error
> _optimize_evaluate(): - function returned error
> _mopt__evaluate(): - function returned error
> mopt__check_test1(): - function returned error
> _moptimize_check(): - function returned error
> Mopt_check(): - function returned error
> <istmt>: - function returned error
> */
-ml check- should only be used with -technique(nr)- and should have given
Olivier an error message to that effect.
We will look into fixing -ml check- to report an error if anything other than
-technique(nr)- is specified to -ml model-.
--Jeff
[email protected]
*
* 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/