[Gretl-devel] Re: Fwd: Lag specification with "to" keyword fails for passed list parameters in functions
-------- 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>
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"
I would guess it's a parser issue.
Doing it in two steps seems to work even inside a function:
function void foo(list D)
list L = LRM D.LRM(-1)
series s = D.LRM
list temp = s(-2 to -4)
L += temp
# L += D.LRM(-2 to -4) # Error: "The symbol 'to' is undefined"
end function
However, perhaps you lose the series name which could be an unwanted
side effect.
cheers
sven
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