convert collection data type to array of string

Please I want to convert collection data type to array of string

I want to use Naiive bayes algorithm such that the training data is a result of association (consequences and item)

consequences is string (which is not a problem)

the problem is in itemset column whose data type is collection of string [a,b,c,....]

i want to convert this column to be string 

I want the training data to be consequences column and itemset column (array of string)



you are probably looking for the Split Collection Column node. Once you have split a collection column over multiple columns you can further aggregate them in one single string using for example the String Manipulation node. See the join(...) or joinSep(...) functions.

Feel free to post your workflow here in case you need more assistance with it.