What are Reference Column Filter / Low Variance Filter for?

Hello everyone,
i have a Question about the nodes Reference Column Filter and Low Variance Filter. In what cases are they useful? What are the tippical areas of appliance.

It would be nice , if someone could answer me.



The Low Variance Filter can be used to do some kind of feature pre-selection. Columns with low variance are likely unsuitable for later prediction. They can even be a problem for e.g. polynomial regression because they introduce interdependencies between columns and/or rows and prevent a unique solution to the regression.

thx for the answer.

then this has no advantage for association rules ? is that correct ???