How to create Empty Nominal values?

[mlauber71]

If you want to artificially create missing values you could see if this trick could help.

Create or replace column with NULL values

Hi! These are examples from the Rule engine node: // enter ordered set of rules, e.g.: // $double column name$ > 5.0 => "large" // $string column name$ LIKE "*blue*" => "small and blue" // TRUE => "default outcome" But you do not need any rule. Simply connect it and check Append Column if you want new column. Give it name and new column with missing values will be created Br, Ivan

Discussion also here:

Replace specific row values of a column with NULL values

Sometimes Rule Engine, Variables and Null values can be tricky. I have added an example where you could define your own replacement rules. Age gets replaced by NULL and gender by “NA”. Please note: there is no generic NULL in the Rule engine but ipazin came up with an clever solution (Create or replace column with NULL values) - create a column with just missing and use that you would always need a TRUE rule that covers everything else. If you do not have one you will create missing values yo…