Re: st: Re: RePEc:boc:bocode:s457480a / spgmmxt

[Nick Cox <njcoxstata@gmail.com>]

The -divide()- function referred to from -rpnfcn- (SSC) is

real matrix divide(real matrix x, real matrix y)
{
  return(x :/ y)
}

This doesn't appear to be needed at all for the purposes of -spgmmxt-,
and elementwise division could just be implemented by :/  (which is
built-in to Mata, as Mata users will know).

Nick


On Fri, Dec 7, 2012 at 6:09 PM, Christopher Baum <kit.baum@bc.edu> wrote:
> <>
> On Dec 6, 2012, at 9:23 PM, MHA Ridhwan wrote:
>
>> Hello,
>> It is really appreaciated to see Spatial econ. in Stata recently.
>> Anyway I have been trying to run SPGMMXT, but it has failed and the message I got as below:
>>
>> ==============================================================================
>> * Spatial Panel Autoregressive Generalized Method of Moments (SPGMM)
>> ==============================================================================
>> ………………………………………………………………..
>>                  <istmt>:  3499  divide() not found
>> r(3499);
>> I am wondering what should I do to fix this problem.
>> Fyi I have already defined:  spweightxt as well.
>>
>> Thanks.
>>
>> Regards,
>> Ridhwan
>>
>>
> It appears that the spgmmxt module makes use of a Mata library included in the RPNFCN package, which is not listed as a dependency in the SPGMMXT package. As the author of SPGMMXT has produced dozens of similarly-named routines, I am unsure which might need this library and which might not. Hopefully he can provide a clarification. The examples in SPGMMXT worked on my machine, as for whatever reason I already have this library installed:
>
> : mata desc using lrpn
> (library contains 19 members)
>
>
>       # bytes   type                        name and extent
> -------------------------------------------------------------------------------
>           608   auto real matrix            MCatnode()
>           200   auto real matrix            MCatwt()
>           128   auto real matrix            Sexp()
>           184   auto real matrix            Swei()
>            88   auto real matrix            add()
>           440   auto real scalar            anyeqpt()
>            88   auto real matrix            divide()
>            80   auto real matrix            enter()
>           152   auto real matrix            fexp()
>           336   auto real matrix            fwei()
>           104   auto real colvector         intres()
>            88   auto real matrix            product()
>           120   auto pointer vector         rotst()
>         1,664   auto real matrix            rpnfcn()
>            88   auto real matrix            subtract()
>           104   auto pointer vector         swapst()
>           488   auto real matrix            tlMCatnode()
>           496   auto real matrix            tlMCatwt()
>            56   auto real matrix            tostack()
> -------------------------------------------------------------------------------
>

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