Remove correlated attributes with ..... null attributes

lionelderkrikor

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

that Remove Correlated Attributes operator 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

Telcontar120

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.