[Gretl-users] how to run multiple regressions at one time

[Sven Schreiber]

Am 29.01.2009 22:30, Allin Cottrell schrieb:


> It's a scalar (usually an integer, and for sure an integer in a
> "foreach" loop); really could not be anything else. The variable
> 'i' is always accessible within a loop, in scalar contexts, as in
> 
>  print i
>  X[i] = foo
> 
> and so on.

Sure, that's the intuitive part.

> 
> In a "foreach" loop the '$i' construction works by lookup:  it
> indexes into the relevant array of strings or variable names and
> returns entry i at iteration i.
> 
> In other sorts of loops, '$i' just gives the string representation
> of the current index value, as if you had done
> 
>   sprintf foo "%d", i
> 

See I guess it's exactly this double, context-dependent, meaning that I
find confusing. I associate $i with string representation, and then I'm
all baffled why that (in a foreach loop context) won't give me a string
with a series name, but some totally different thing.

Couldn't the two meanings be syntactically separated? Just a different
character perhaps?

thanks,
sven