Remove special charactaristics

[mlauber71]

@minan you can use RegEx to declare which characters are allowed and the rest will be removed.

Tree Ensemble Learner does not recognize newlines in column names (include/exclude filter does)

@tims you could use a regex function and a “Insert Column Header” node to clear your variable names. The logic is you remove everything that is not explicitly permitted. In this case a blank is OK. You might edit that to your needs. regexReplace($Column Name$,"[^a-zA-Z0-9 ]","") [image]

Help needed: Source column header has line break within.

Hi @knimedt Welcome to the KNIME forum. You can achieve this by using a Column Rename (Regex) node. Simple use [\n\r\t] and it will clean-up all your columns (keep Replace empty). [image] Before: [image] After: [image]