Re: [Gretl-users] about arrays as argument of yahoo_get
Hi Guido,
The problem is where your "nulldata" command is. In the first version, it wipes
out the array declaration. You should either put that command first or use the --preserve
option for it (ie, "nulldata 10 --preserve") which will keep previously declared
variables (I think arrays are preserved, but I could be wrong about that).
HTH,
PS
Sent from my iPad
On Aug 18, 2016, at 6:55 PM, guido giaume <guido(a)giaume.it>
wrote:
Dear all
I spent some time before i realized the position of a declaration of
array as argument of a function seems to be very critical.
I mean that this following script is NOT working "as is", but if i
change the position of the declaration it works.
-----------------------------------------------------
#ARRAY DECLARATION far from yahoo_get
strings P = defarray("A2A.MI", "ANIM.MI")
# OPEN SET 10 DAYS
nulldata 10
# TIME SERIES
setobs 5 2016-07-01 --time-series
# CALL yahoo_get
include yahoo_get.gfn
######## QUESTION ITEM
######## strings P = defarray("A2A.MI", "ANIM.MI")
#DOWNLOAD LOOP
loop i=1..nelem(P)
A=yahoo_full(P[i])
endloop
------------------------------------------------------------
you easily can verify the script isn't working
BUT
if I put the array declaration near the yahoo_get the script works.
-----------------------------------------------------
######## cut off
the previous declaration
######## strings P = defarray("A2A.MI",
"ANIM.MI")
# OPEN SET 10 DAYS
nulldata 10
# TIME SERIES
setobs 5 2016-07-01 --time-series
# CALL yahoo_get
include yahoo_get.gfn
#ARRAY DECLARATION near yahoo_get
strings P = defarray("A2A.MI", "ANIM.MI")
loop i=1..nelem(P)
A=yahoo_full(P[i])
endloop
------------------------------------------------------------
now it works.
So maybe it's a trivial subjetc but i will appreciate some help to understand why it
happens.
Cheers
Guido
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