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How to balance data based on attribute value?

Hi,

i have a dataset with an attribute called "demo".

There are 3 possibles values in "demo" atribute:

"Alpha" which counts 4000 rows
"Beta" which counts 3000 rows
"Omega" which counts 2000 rows

How can i generate a new dataset balanced with the same number of rows?

"Alpha" which counts 2000 rows
"Beta" which counts 2000 rows
"Omega" which counts 2000 rows

Thanks

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BalazsBaranyRM

Hi,

look at the tutorial process for the Sample operator (linked in the help text).

It shows that the "balance data" is being used for this. You need to set the role of your demo attribute to "label", activate "balance data" in Sample, set the sampling method to absolute, and then enter the desired number of examples in the Edit List dialog.

Regards,
Balázs

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