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: xmelogit error message
From
KOTa <[email protected]>
To
[email protected]
Subject
Re: st: xmelogit error message
Date
Mon, 22 Oct 2012 16:56:31 +0200
Hi Nick,
probably i didnt explain myself clearly.
"simplify it first and then complicate it gradually to see what is problematic."
this is exactly what i do, the moment i add to the model any
categorical variable with more than 2 levels - error message appears.
all other variables are ok
On Mon, Oct 22, 2012 at 1:54 PM, Nick Cox <[email protected]> wrote:
> -xtmelogit- is finding difficulty fitting your model. The most obvious
> thing to do is to simplify it first and then complicate it gradually
> to see what is problematic.
>
> Nick
>
> On Mon, Oct 22, 2012 at 12:29 PM, KOTa <[email protected]> wrote:
>
>> i am using xmelogit to estimate the model where some IV are categorical.
>>
>> when i am trying to use IV which are categorical predictors with more
>> then 2 levels (i.e. not just 0/1 - those are added without problems)
>>
>> e.g. i.status , where status values are A to F (encoded as numbers)
>>
>> i receive a following message:
>>
>> "numerical derivatives are approximate
>> flat or discontinuous region encountered"
>>
>> what does it mean?
>> i dont use those variables correctly?
> *
> * 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/
*
* 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/