I wonder whether it is possible to use "!" regular expressions in the Row Filter Node.
I have a table and I want to remove all rows that contain "Unspecified" in the column "reference".
For that I used Row Filter > Configure > select column to test = reference
then match criteria > use pattern matching > pattern = !Unspec.*
and checked "regular expressions".
It works without the "!" getting all the Unspecified entries, but I want the reverse.
everything leads to an empty table.
Is "!" not functional in the RegEx implementation of KNIME?