It worked for me. Thank you!
A simple way to do this is using an R-Snippet with the code
knime.out<-knime.in(complete.cases(knime.in),]
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A way to do this without regex is to use the Column Auto Type Cast node:
Column Auto Type Cast — NodePit
and set the “missing value pattern” to “empty”:
This should then give you missing values in your empty cells that can be filtered or manipulated otherwise:
BW