12:01 p.m.
On Thu, 10 Jan 2019, Sven Schreiber wrote:
Am 10.01.2019 um 17:20 schrieb Riccardo (Jack) Lucchetti:
> On Wed, 9 Jan 2019, Artur T. wrote:
>>> Am 09.01.19 um 21:39 schrieb Alecos Papadopoulos:
>>>> I have version 2018d Windows 64-bit.
>>>>
>>>> I try to generate random numbers using the "Random variable..."
command
>>>> in the Add menu and I get
>>>>
>>>> <<'U1' -- no numeric conversion performed!>>
>>
>> I can confirm this using current git (2019a) on ubuntu linux.
>
> This should be now fixed in git.
Good, I tend to think it's a pretty severe bug, for example for teaching
purposes...
[I'm moving this to gretl-devel because it's fairly technical, but IMO
wotrh reading for people who like to see what's going on in the C sources]
In fact, it was pretty subtle: the C construct that was causing trouble
was
na(x[j++])
and you would think: "OK, this evaluates if x[j] is missing, and then
moves on"; not quite. In fact, na(x) has become (after the big NADBL
reoganisation) a macro in which TWO calls are performed, so j would go
straight from 0 to 2. I performed a search for similar construct in the
whole source tree and fortunately there seem to be no more instances.
-------------------------------------------------------
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
-------------------------------------------------------
12:13 p.m.
New subject: [Gretl-users] Problem with Add Random Variable menu command
Am 10.01.2019 um 18:01 schrieb Riccardo (Jack) Lucchetti:
On Thu, 10 Jan 2019, Sven Schreiber wrote:
> Am 10.01.2019 um 17:20 schrieb Riccardo (Jack) Lucchetti:
>> This should be now fixed in git.
>
> Good, I tend to think it's a pretty severe bug, for example for
> teaching purposes...
[I'm moving this to gretl-devel
Actually you kept users on cc, but this now should only go to devel I hope.
In fact, it was pretty subtle: the C construct that was causing
trouble was
na(x[j++])
and you would think: "OK, this evaluates if x[j] is missing, and then
moves on"; not quite. In fact, na(x) has become (after the big NADBL
reoganisation)
I already suspected that it had to do with the NA recoding because it
seemed to be the only internal structural break which could have such
side effects.
Anyway, what I meant is that perhaps an extra quick release might be in
order, similarly to what was done with 1.10.1 (2015b) about the ADF test
breakage.
cheers,
sven
1:06 p.m.
New subject: [Gretl-users] Problem with Add Random Variable menu command
On Thu, 10 Jan 2019, Sven Schreiber wrote:
Anyway, what I meant is that perhaps an extra quick release might be
in
order, similarly to what was done with 1.10.1 (2015b) about the ADF test
breakage.
Hm, I don't know. I guess it depends on how widely used the GUI interface
is for generating random series. I wouldn't consider this a big issue, but
I'm open to changing my mind.
-------------------------------------------------------
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
-------------------------------------------------------
1:44 p.m.
New subject: [Gretl-users] Problem with Add Random Variable menu command
On Thu, 10 Jan 2019, Riccardo (Jack) Lucchetti wrote:
On Thu, 10 Jan 2019, Sven Schreiber wrote:
> Am 10.01.2019 um 17:20 schrieb Riccardo (Jack) Lucchetti:
>> On Wed, 9 Jan 2019, Artur T. wrote:
>
>>>> Am 09.01.19 um 21:39 schrieb Alecos Papadopoulos:
>>>>> I have version 2018d Windows 64-bit.
>>>>>
>>>>> I try to generate random numbers using the "Random
variable..." command
>>>>> in the Add menu and I get
>>>>>
>>>>> <<'U1' -- no numeric conversion performed!>>
>
>>>
>>> I can confirm this using current git (2019a) on ubuntu linux.
>>
>> This should be now fixed in git.
>
> Good, I tend to think it's a pretty severe bug, for example for teaching
> purposes...
[I'm moving this to gretl-devel because it's fairly technical, but IMO wotrh
reading for people who like to see what's going on in the C sources]
In fact, it was pretty subtle: the C construct that was causing trouble was
na(x[j++])
and you would think: "OK, this evaluates if x[j] is missing, and
then moves on"; not quite. In fact, na(x) has become (after the big
NADBL reoganisation) a macro in which TWO calls are performed, so j
would go straight from 0 to 2. I performed a search for similar
construct in the whole source tree and fortunately there seem to be
no more instances.
Well figured out! Macros can be quite tricky.
Re. Sven's suggestion of a quick release with the fix: I'm not averse
to doing that. I've been working on our SVM support and the sooner we
release the sooner that support will be enabled in third-party builds
of gretl for Linux. (Up till now SVM has been optional, and dependent
on installed libsvm; now I've put a modified version of the libsvm
code into git so it's self-contained.)
Allin
1:46 p.m.
New subject: [Gretl-users] Problem with Add Random Variable menu command
I've been working on our SVM support and the sooner we
release the sooner that support will be enabled in third-party
builds
of gretl for Linux. (Up till now SVM has been optional, and dependent on
installed libsvm; now I've put a modified version of the libsvm code
into git so it's self-contained.)
This is great news, Allin!
Artur
2102
days inactive
2102
days old
4 comments
4 participants
participants (4)
-
Allin Cottrell -
Artur T. -
Riccardo (Jack) Lucchetti -
Sven Schreiber