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Sample: balance data: what should I put as *class* when sample size per class?
Learner I
Hello everyone!
I have a problem with the balance data in the operator sample. When I have to sample size per class what should I put for class? I have one variable that I have set to 'label' and that is the variable I want to balance the data on.
The error when I try for example class='label' or the name of the class (in my case 'species') and the size='50' is:
Message: Calculation of covariance matrices not possible for data sets with zero rows.
Thanks!
I have a problem with the balance data in the operator sample. When I have to sample size per class what should I put for class? I have one variable that I have set to 'label' and that is the variable I want to balance the data on.
The error when I try for example class='label' or the name of the class (in my case 'species') and the size='50' is:
Message: Calculation of covariance matrices not possible for data sets with zero rows.
Thanks!
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Best Answer
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MartinLiebig
Administrator, Moderator, Employee-RapidMiner, RapidMiner Certified Analyst, RapidMiner Certified Expert, University Professor Posts: 3,533 
RM Data Scientist
Hi,you want to take the class (=value) of the label attribute. E.g. 'Yes' or 'No' of Titanic.Best,Martin- Sr. Director Data Solutions, Altair RapidMiner -
Dortmund, Germany5
