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The feature constructor widget deletes all the new variable definitions when you change variables in upstream widgets, it deletes even new variables that do not use the changed variables.
For example, I use an Integrate spectra widget to create variables that I then ratio against each other in the Feature constructor. If I modify or delete one of the integrated variables in teh upstream widget, all variables creatd in the Feature constructor disappear, even those that do not use the modified variable.
I uploaded a worflow that can be used to reproduce the bug. It uses data from the repository accessed with the Dataset widget.
Example workflow:
File (iris) - Select Column (do nothing yet) - Feature Constructor.
Create two new variables, one from sepal length and one from sepal width (say sepal length + 1).
Now remove sepal width from attributes with Select Columns.
The entire Feature Constructor becomes empty.
It should keep sepal length since it is still in the domain.
janezd
added
bug
A bug confirmed by the core team
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bug report
Bug is reported by user, not yet confirmed by the core team
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Oct 22, 2021
The feature constructor widget deletes all the new variable definitions when you change variables in upstream widgets, it deletes even new variables that do not use the changed variables.
For example, I use an Integrate spectra widget to create variables that I then ratio against each other in the Feature constructor. If I modify or delete one of the integrated variables in teh upstream widget, all variables creatd in the Feature constructor disappear, even those that do not use the modified variable.
I uploaded a worflow that can be used to reproduce the bug. It uses data from the repository accessed with the Dataset widget.
I use Orange '3.29.3' in Quasar 1.2 on Windows X
Quasar was installed from the installer.
Bug report feature constructor workflow.zip
Thanks
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