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Re: st: Can -bootstrap- handle vectors


From   Matthew White <mwhite@poverty-action.org>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Can -bootstrap- handle vectors
Date   Sat, 13 Aug 2011 16:28:07 +0300

Good point... But you'll have to be careful when using -st_local()-.
st_local("test", 1) fails, so you'll have to execute st_local("test",
"1"). But once you have local test in Stata, you can use it as a
numeric fine. In my example before, you could execute something like
st_local("rows", strofreal(rows(X)). Probably better than messing with
scalars...

On Sat, Aug 13, 2011 at 4:13 PM, Nick Cox <njcoxstata@gmail.com> wrote:
> A side issue: The distinction between numeric and string does not bite here
> for returning macros to Stata.
>
> A local macro is a place for holding character strings, which can be numeric
> characters. Thus  -st_local()- will work fine regardless of content.
>
> Nick
>
> On 13 Aug 2011, at 10:12, Matthew White <mwhite@poverty-action.org> wrote:
>
>> I don't know of a way to use Mata to put numeric values in a local.
>> st_local only works with string values, I think. But you could return
>> each element of a Mata vector to separate Stata scalars. Say X is a
>> Mata column vector:
>> mata: st_numscalar("r(rows)", rows(X))
>> forvalues row = 1/`r(rows)' {
>>   mata: st_numscalar("r(v`row')", X[`row',
>>>
>>>
>>>
>>>
>>>
>>>
>>>
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-- 
Matthew White
Evaluation Coordinator
Urban Micro-Insurance Project
Innovations for Poverty Action

+254 (0)701 025 276
mwhite@poverty-action.org

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