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Re: st: problem using "vselect"


From   Matthew Hamilton <[email protected]>
To   Statalist <[email protected]>
Subject   Re: st: problem using "vselect"
Date   Tue, 2 Jul 2013 09:56:28 -0400

There was a bug in -vselect- related to the fix() option, but it was
fixed a while ago in the update. Thanks for your help. Much .ado about
nothing...

Matt

On Fri, Jun 28, 2013 at 5:41 PM,  <[email protected]> wrote:
> Matthew Hamilton <[email protected]> has a problem using the -vselect-
> command.
>
>>Hi, I'm using the vselect package as follows:
>>
>>vselect depvar varlist, fix(indepvar1 indepvar2) best
>>
>>"Varlist" stands for a long list of candidate predictors. This list does not
>>include indepvar1, indepvar2, or depvar. My understanding is that the option
>>fix(indepvar1 indepvar2) forces the algorithm to give the "best" model that
>>contains those two variables for each quantity of predictors. For example:
>>
>>vselect logI2010pc logGCI7_LaborMarketEfficiency
>>logGovcontrolofcorruption logLFPR2010, fix(logGDP2010pc logWA2010pc)
>>best
>>
>>However, I keep getting the error: "The Fixed variables overlap with
>>the predictors/response."
>>
>>Based on my reading of vselect.ado, I am pretty sure it is supposed to
>>give this error when varlist and the fix() vars are not disjoint.
>>What's going on? Could this be a bug in vselect?
>
> We were unable to replicate Matthew's error.  -vselect- was updated in 2011 to
> correct a bug related to the -fix()- option.  Maybe Matthew's version of
> -vselect- is out of date.   Matthew can get the current version of -vselect-
> by typing
>
>   . adoupdate st0213, update
>
> Charles Lindsey
> Senior Statistician and Software Developer
> StataCorp
> [email protected]
> *
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-- 
Matthew Hamilton, MS, MPH
Social Scientist
Futures Group Global
One Thomas Circle NW, Washington, DC 2005
919-624-1502 || [email protected]
*
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