Hello,
I have a problem with my data.
The column “values” contains names e.g. aa1, aa2 etc.
Between the names there is always the same placeholder e.g. “dummy”.
I have to replace the placeholder with the name from above, see img:
How is that possible in KNIME?
Greetings
Hi @Tim8200
See this wf replace_placeholder.knwf (17.5 KB) . First it makes your Placeholder (dummy) missing. Then the missing values are replaced by the previois value.
gr. Hans
this was very easy 
thanks…
@Tim8200 you can also do the replacement only for a specific column
@HansS nice solution with the implicit creation of a missing value in the Rule Engine 
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