Remove correlated attributes with ..... null attributes

lionelderkrikorlionelderkrikor Moderator, RapidMiner Certified Analyst, MemberPosts:1,195Unicorn
edited December 2018 inHelp

Dear all,

It is a very special case, however ..... :

By working on a dataset with many null attributes (all values of these attributes are null), I discover

thatRemove Correlated Attributesoperator don't take them into account : They are not removed.

I assume that it is because the definition of the correlation coefficient.

What should be the behaviour of this operator in this case ?

Regards,

Lionel

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Best Answer

  • Telcontar120Telcontar120 Moderator, RapidMiner Certified Analyst, RapidMiner Certified Expert, MemberPosts:1,635Unicorn
    Solution Accepted
    I think "Remove Useless Attributes" should be able to discard the attributes with all or mostly missing values for you.
    You could also use Replace Missing Values with a constant number before the Remove Correlated Attributes approach.
    Brian T.
    Lindon Ventures
    Data Science Consulting from Certified RapidMiner Experts
    sgenzer lionelderkrikor

Answers

  • lionelderkrikorlionelderkrikor Moderator, RapidMiner Certified Analyst, MemberPosts:1,195Unicorn

    Hi@Telcontar120,

    Indeed,Remove Useless Attributeswas the solution adapted to my dataset ! (I didn't know this operator).

    Thanks you, Brian,

    Regards,

    Lionel

    sgenzer
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