wrong value type when joining

eldenosoeldenoso Member Posts: 65 Contributor I
edited November 2018 in Help


I have a problem when joining two databases together. In the first one RapidMiner identifies the attribute as integer and in the other one as nominal (actually they are both just numerical). Everytime I start the process, the joining operator stops because of "wrong value types of the example sets". 

What can I do to change the value types of both?

Thank you!

Best Answer

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    Thomas_OttThomas_Ott RapidMiner Certified Analyst, RapidMiner Certified Expert, Member Posts: 1,761 Unicorn
    Solution Accepted

    You'll have to convert one of the data types (either the integer or nominal) to the same data type. You can use a Numerical to Nonminal or Nominal to Numerical operator.


    OR you can just put a Guess Types operator after the Read Database operator where the integer comes in as a Nominal value.

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