[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

RE: st: RE: Using Mata within a foreach loop = r(1)

From   "Nick Cox" <[email protected]>
To   <[email protected]>
Subject   RE: st: RE: Using Mata within a foreach loop = r(1)
Date   Fri, 7 Dec 2007 15:39:08 -0000

That's a good question. 

I am working backwards from the fault. 

If your -end- were being treated as you intended, as a Mata 
statement, it would seem quite legal as such and there would be 
no error message, and no problem. 

Manifestly this is not happening. So what is happening? Your 
-end- is being misinterpreted, so far as you are concerned, 
and treated as a Stata statement. That's my diagnosis, and 
evidently Maarten's too. 

In general I am wary of calling anything a bug until I clearly 
understand it to be such, and that view still applies for me 
here until I hear otherwise. 

The territory we are in may arise from the fact, as I understand 
it, that -for*- loops in a sense define a kind of "program". 
Within such contexts, -end- may be ambiguous. 

Stata's rules evidently yield a Stata interpretation for -end- 
in your code, and that's your problem. 

(At one point, Mata ended with -mend-, but that didn't follow 
through to release, and that decision is not reversible.) 

There is some guesswork here. We need a StataCorp resolution. 

Pablo Mitnik

Nick Cox wrote:
> The answer to your 2 is Yes, with some exceptions for good reasons, as

> when you call Stata from Mata, but that is not the issue as I 
> understand it.
> The issue is that at that point in your code you are back in Stata and

> so (in context) -end- is illegal.

Why am I back in Stata at this point?

*   For searches and help try:

© Copyright 1996–2024 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index