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Re: st: referencing eresult matrices


From   Ben Jann <ben.jann@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: referencing eresult matrices
Date   Sat, 7 Nov 2009 21:14:23 +0100

mata: st_local("b", strofreal(st_matrix("e(b)")[1,1], "%20.0g"))

ben

On Sat, Nov 7, 2009 at 6:51 PM, Martin Weiss <martin.weiss1@gmx.de> wrote:
>
> <>
> Any way to process this value further/drag it back into Stata?
>
>
> HTH
> Martin
>
> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Austin Nichols
> Sent: Samstag, 7. November 2009 18:17
> To: statalist@hsphsun2.harvard.edu
> Subject: Re: st: referencing eresult matrices
>
> One way:
> mata:st_matrix("e(b)")[1,1]
>
> On Fri, Nov 6, 2009 at 8:36 AM, Nick Cox <n.j.cox@durham.ac.uk> wrote:
>> I don't know one. I guess the low-level syntax parser needs a subscript to
> be preceded by a matrix or variable name and tweaking it so this could be
> understood is more bother than it's worth. As you know, you have to worry
> about what such a change might break.
>>
>> Nick
>> n.j.cox@durham.ac.uk
>>
>> Jeph Herrin
>>
>> Thanks, but as the subject line says, I want to
>> reference e(matrix) directly - I just gave one
>> example. I've been using the below method for years,
>> so I hardly think about it anymore, but every once
>> in a while wonder if there's a shorter way.
>>
>> Maarten buis wrote:
>>
>>> --- On Thu, 5/11/09, Jeph Herrin wrote:
>>>> After an estimation, I often want to get a particular
>>>> element of one of the result matrices, and know I can do
>>>> it as follows:
>>>>
>>>>   reg y x
>>>>   matrix b = e(b)
>>>>   di el("b",1,1)
>>>>
>>>> But there must be a way to eliminate the middleman b? This
>>>>
>>>>   reg y x
>>>>   di el("e(b)",1,1)
>>>>
>>>> doesn't work, but I'm sure there's a way to reference e(b)
>>>> so that I don't need to store it in another matrix first.
>>>> In fact, I'm sure I knew it once, even.
>>>
>>> Say the variable whose coefficient you want is called x,
>>> than you can refer to it as _b[x] (and its standard error as
>>> _se[x]).
>>>

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