st: re: adding variables from Mata

[Kit Baum <baum@bc.edu>]

Amadou said

> My problem is that I need to return some colvector
> matrices in stata as variables to be used later. I
> don't know how to do that:
>
>         for (i=1; i<=cols(Z1); i++) {
>            printf("i=%g\n",i)
>            Z1i = Z1[1...,i]
>            nomx = ("Z1i")
>            stata("cap drop Z1i")
> // I tried "cap drop Z1`i'", not working
>            st_addvar("double",nomx)
>            st_store(.,nomx,Z1i)
>         }
>
> My matrice Z1 has 3 columns. I want to create Z11
> Z12 Z13 as new variables in my datasets. But in
> Stata I only get Z1i as a variable.


IMHO easiest way to do this is to create the variables in Stata as  
missing, create a view matrix in Mata of those variables, and just  
fill it in.  Viewsource hprescott.ado for an example.

Kit


Kit Baum, Boston College Economics
http://ideas.repec.org/e/pba1.html
An Introduction to Modern Econometrics Using Stata:
http://www.stata-press.com/books/imeus.html


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