Fwd: Lag specification with "to" keyword fails for passed list parameters in functions
by Riccardo (Jack) Lucchetti
Artur seems to have some problems with this list, so I'm copy-pasting
his message. In the meantime, I'll try to see what's wrong with the
mailing list server.
-------- Forwarded Message --------
Subject: Lag specification with "to" keyword fails for passed list
parameters in functions
Date: Fri, 22 May 2026 10:26:10 +0200
From: Artur T. <artur.tarassow(a)gmail.com>
Reply-To: artur.tarassow(a)gmail.com
To: Gretl development <gretl-devel(a)gretlml.univpm.it>
Hi all,
I've encountered what appears to be a bug (or unsupported feature) when
using
lag specifications with the "to" keyword inside functions when referring
to a
passed list parameter.
The following code produces an error: "The symbol 'to' is undefined"
<hansl>
set verbose off
open denmark.gdt --quiet
function void foo(list D)
list L = LRM D.LRM(-1)
L += D.LRM(-2 to -4) # Error: "The symbol 'to' is undefined"
end function
foo(dataset)
</>
The "to" keyword fails specifically when used with lag specifications on
passed
list parameters inside functions.
Is this a known limitation, an unimplemented feature, or an actual bug?
Is it a
parsing problem specific to how gretl handles lag syntax within function
contexts.
Thanks
Artur
--
-------------------------------------------------------
Riccardo (Jack) Lucchetti
Dipartimento di Scienze Economiche e Sociali (DiSES)
Università Politecnica delle Marche
(formerly known as Università di Ancona)
r.lucchetti(a)univpm.it
http://www2.econ.univpm.it/servizi/hpp/lucchetti
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