5:25 p.m.
On Fri, 10 Dec 2010, Henrique Andrade wrote:
There's a problem that appears with a considerable frequency here
at
my work: To delete unused variables inside a Gretl session.
Please take a look at the .gretl file attached.
The variables "fora_de_uso", "fora_de_uso2", and
"fora_de_uso3" (ID
numbers: 9, 5, and 18, respectively) cannot be deleted even though
they are not being used.
Why does this happen?
It happens because if you were to delete those variables this
would result in the re-numbering of several variables that appear
as dependent or as regressors in saved models, which would totally
confuse gretl.
Perhaps the error message should be adjusted in this case: saying
that the variable is "in use" is not quite accurate. But the
substantive point is correct: you really can't delete those series
without destroying your session file.
Allin Cottrell
6:41 p.m.
New subject: Trouble in deleting variables
Em 10 de dezembro de 2010 Allin Cottrell <cottrell(a)wfu.edu> escreveu:
On Fri, 10 Dec 2010, Henrique Andrade wrote:
> There's a problem that appears with a considerable frequency here at
> my work: To delete unused variables inside a Gretl session.
>
> Please take a look at the .gretl file attached.
>
> The variables "fora_de_uso", "fora_de_uso2", and
"fora_de_uso3" (ID
> numbers: 9, 5, and 18, respectively) cannot be deleted even though
> they are not being used.
>
> Why does this happen?
It happens because if you were to delete those variables this
would result in the re-numbering of several variables that appear
as dependent or as regressors in saved models, which would totally
confuse gretl.
Perhaps the error message should be adjusted in this case: saying
that the variable is "in use" is not quite accurate. But the
substantive point is correct: you really can't delete those series
without destroying your session file.
Dear Allin,
In my humble opinion this behavior doesn't look good. Suppose
the following script:
*<script>*
*open *australia.gdt
*ldiff *PAU PUS E
"Modelo 1" <- *ols *ld_E *const *ld_PAU ld_PUS
*delete *IAU IUS ius2 iau2 e2 lpus lpau
# Now save the results in a Gretl session
*</script>*
Now suppose you want to share this model with other Gretl
users in a more "clean" way, ie, you want to exclude all the
irrelevant information inside the session (like the variables that
are not in use, saved models, graphs, etc.).
I know we can delete the series before the calculations (*log*,
*ldiff*, etc.), but sometimes only after our "job" has finished we
can see which series are useless.
Best,
Henrique
7:38 p.m.
New subject: Trouble in deleting variables
Am 10.12.2010 19:41, schrieb Henrique Andrade:
Em 10 de dezembro de 2010 Allin Cottrell <cottrell(a)wfu.edu
It happens because if you were to delete those variables this
would result in the re-numbering of several variables that appear
as dependent or as regressors in saved models, which would totally
confuse gretl.
Perhaps the error message should be adjusted in this case: saying
that the variable is "in use" is not quite accurate. But the
substantive point is correct: you really can't delete those series
without destroying your session file.
Dear Allin,
In my humble opinion this behavior doesn't look good. Suppose
hm, I think I'm sharing Henrique's view here. I certainly don't want to
confuse gretl (meaning: I understand that this is stuff that cannot be
changed quickly or easily), but in principle I think the external
numbering of variables shouldn't cause these kind of constraints.
Which leads me to ask: why actually do the variables have to be
renumbered after deleting something? Couldn't the numbers be simply
non-contiguous? Alternatively, maybe (in the longer term) there should
be a mapping from an internal immutable id number to the externally
visible numbering of the variables.
[maybe this discussion should be continued on the devel list]
thanks,
sven
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Allin Cottrell -
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Sven Schreiber