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Re: st: Locals and Mata Script execution
From
Nick Cox <[email protected]>
To
[email protected]
Subject
Re: st: Locals and Mata Script execution
Date
Mon, 3 Sep 2012 17:29:45 +0100
Don't try to do this. It's probably not impossible, but it is a small
nightmare. Have a look at
SJ-11-2 pr0052 . . . . Stata tip 100: Mata and the case of the missing macros
. . . . . . . . . . . . . . . . . . . . . . . . W. Gould and N. J. Cox
Q2/11 SJ 11(2):323--324 (no commands)
tip showing how to do the equivalent of Stata's macro
substitution in Mata
Nick
On Mon, Sep 3, 2012 at 5:07 PM, Bruno Boynard <[email protected]> wrote:
> I'm having trouble using Stata locals to run MATA scripts. I tried to
> use the same code in different versions of Stata.
>
> The issue is that I want to create a series of numbered matrix like
> M1, M2, ... Mn. For that, I'm creating a counter in a loop and using
> this counter for numbering the matrix. Finally I'm using a Stata local
> in order to execute a MATA script.
>
> Below is the final code (I've tried rewriting the code in different
> ways but always with problems):
>
> mata
>
> s_total=10000
> cR=55*s_total
> lX=trunc(s_total/8000)+1
> lZ=trunc(cR/8000)+1
> i
> for(i=1;i<=lX;i++) {
> c=i
> st_matrix("c",c)
> stata("local x=c[1,1]")
> stata("local M J(8000,5,0)")
> stata("local Z M`x'=`M'")
> `Z'
> }
>
> end
>
> The main objective here is that I'd like to transfer a big Matrix (lX
> lines in this point of the code and lZ in another) generated in Mata
> to Stata database. To do that, I will split this Matrix in many others
> and than export using a st_matrix in each one. I'm not using a st_view
> because I'm generating matrix in MATA using different data bases and
> the result is completely different from the original databases.
>
> Thanks in advance,
>
> Bruno
> *
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*
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