[Gretl-devel] Re: small error and a suggestion
On Wed, 29 Sep 2021, Ignacio Diaz-Emparanza wrote:
I have just started teaching a basic econometric class.
I found an error in gretl GUI: when you have a qualitative variable, you
obtain the dummies for this variable and try to define a new variable, for
example multiplying one of the dummies by another variable (quantitative or
dummy from other qualitative). You will go now to the menu "Add->Define new
variable", you write a new name and a '=' but now if you click on the name
of
the dummy for building the operation, the name written into the dialog is the
name of the original (qualitative), not the name of the dummy.
OK, I see what you mean. That's now fixed in git, and the fix will be
in the 2021d release, due out soon.
The suggestion is about the scatterplot. Normally, when I start a new
class
on Econometrics, I like to show the scatterplot of two variables for
illustrating the linear relationship. But it is a litte bit uncomfortable
that the gretl scatterplot by default shows the OLS estimated line. I suggest
to put this line as an option, may be in the same dialog in which you have to
select the variable for X axis.
In git there's now a checkbox in that dialog, labeled "Suppress fitted
line". If you check that box, no fitted line will be shown. I put the
choice in that form (as opposed to "Show fitted line") because the
current default is to show a linear fit only if the slope is
significant at the 10 percent level. The GUI "Suppress..." check-box
corresponds to the scriptable option --fit=none.
Allin