11:27 a.m.
Hi,
in the changelog of 2017b I read:
"Fix bug: ensure that the $model accessor (bundle) is
available to function packages that attach to a model window"
And indeed I have a function here (to be packaged) that takes a
$model-style bundle as an argument. How do I have to specify the
function signature or argument so that it is actually the $model bundle
that is automatically handed over to the package?
I looked briefly in the package guide, but couldn't find an answer (I
think).
thanks,
sven
8:02 a.m.
On Tue, 30 May 2017, Sven Schreiber wrote:
Hi,
in the changelog of 2017b I read:
"Fix bug: ensure that the $model accessor (bundle) is
available to function packages that attach to a model window"
And indeed I have a function here (to be packaged) that takes a $model-style
bundle as an argument. How do I have to specify the function signature or
argument so that it is actually the $model bundle that is automatically
handed over to the package?
I looked briefly in the package guide, but couldn't find an answer (I think).
Yep, it's not in the package guide yet. But it's straightforward: in
your GUI interface function, just grab hold of $model and pass it to
the function that actually does the business. I have an example that I
was planning to share in the "code sprint" -- here's its "GUI
main":
function bundle GUI_exogtest (int xvar[$mylist] "regressor to test")
matrix ds = exogtest($model, deflist(xvar))
return defbundle("test", ds[1], "df", ds[2], "pvalue",
ds[3])
end function
Besides illustrating use of $model there's a second novelty here: the
int "xvar" argument has a default value of "$mylist". This requires
that the gfn spec designates a "list-maker" function, as in
list-maker = exogtest_listmaker
Then the list-maker function will be invoked automatically to populate
a drop-down selector showing names of series, and the value received
for "xvar" will be the ID number of the series selected by the user.
I might as well attach the whole script for this forthcoming package
so you can get the context. It implements the "diff in Sargan" test
for exogeneity of a particular term in a TSLS model.
Allin
11:23 a.m.
Am 31.05.2017 um 10:02 schrieb Allin Cottrell:
On Tue, 30 May 2017, Sven Schreiber wrote:
> $model-style bundle as an argument. How do I have to specify the
> function signature or argument so that it is actually the $model
> bundle that is automatically handed over to the package?
> I looked briefly in the package guide, but couldn't find an answer (I
> think).
Yep, it's not in the package guide yet. But it's straightforward: in
your GUI interface function, just grab hold of $model and pass it to the
function that actually does the business. I have an example that I was
planning to share in the "code sprint" -- here's its "GUI main":
function bundle GUI_exogtest (int xvar[$mylist] "regressor to test")
matrix ds = exogtest($model, deflist(xvar))
return defbundle("test", ds[1], "df", ds[2], "pvalue",
ds[3])
end function
Great, thanks! So if I understand correctly:
- I can use $model directly (without extra function arguments) within
the public functions of the package that I assume will be invoked via
the GUI.
- Or is the designation of "menu-attachment" for the package then
mandatory? (In the package guide it says it's optional, but this may be
a special case.)
- It is probably recommended to specify such functions as "menu-only" in
the package?
- Just to be sure: $model within a function in a standard context is
only valid if inside the same function something was estimated, not
outside the function, right?
thanks,
sven
4:41 p.m.
I think everything you say is correct, though I'd have to run a check to
verify. The general rule is that $model inside a function can only refer
to a model estimated previously within the same function - with the
exception of the case of a function that attaches to a model window menu,
where it gets access to the model whose window it is.
I hope that's reasonably clear.
On May 31, 2017 2:24 PM, "Sven Schreiber" <svetosch(a)gmx.net> wrote:
Am 31.05.2017 um 10:02 schrieb Allin Cottrell:
> On Tue, 30 May 2017, Sven Schreiber wrote:
>
$model-style bundle as an argument. How do I have to specify the function
>> signature or argument so that it is actually the $model bundle that is
>> automatically handed over to the package?
>> I looked briefly in the package guide, but couldn't find an answer (I
>> think).
>>
>
> Yep, it's not in the package guide yet. But it's straightforward: in your
> GUI interface function, just grab hold of $model and pass it to the
> function that actually does the business. I have an example that I was
> planning to share in the "code sprint" -- here's its "GUI
main":
>
> function bundle GUI_exogtest (int xvar[$mylist] "regressor to test")
> matrix ds = exogtest($model, deflist(xvar))
> return defbundle("test", ds[1], "df", ds[2],
"pvalue", ds[3])
> end function
>
Great, thanks! So if I understand correctly:
- I can use $model directly (without extra function arguments) within the
public functions of the package that I assume will be invoked via the GUI.
- Or is the designation of "menu-attachment" for the package then
mandatory? (In the package guide it says it's optional, but this may be a
special case.)
- It is probably recommended to specify such functions as "menu-only" in
the package?
- Just to be sure: $model within a function in a standard context is only
valid if inside the same function something was estimated, not outside the
function, right?
thanks,
sven
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3 comments
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participants (3)
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Allin Cottrell -
Cottrell, Allin
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Sven Schreiber