Re: Filter dataset by column value Wrapper Python

Excerpt from my email with the code example:

"ATTx with x being 1-based index"

The class attribute in the iris dataset is the 5th.

What index is your attribute?

Cheers, Peter

On October 29, 2021 9:22:01 PM GMT+13:00, [email protected] wrote:
>You were right, it was the attribute location. 
>
>Now, I get an error from this line:
>
>subdata = f.filter(data)
>
>The error is: 
>JavaException: Variable 'ATT5' is undefined! 
>
>this is the part of the code:
>Filter(classname="weka.filters.unsupervised.instance.SubsetByExpression",
>           options=["-E", "ATT5 is '%s'" % val])
>    f.inputformat(data)
>
>I want to filter by the variable "vehicle_id", it goes from 0 to 2453. I've checked the iris.arff and none ATT5 is defined.
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--
Peter Reutemann
Dept. of Computer Science
University of Waikato, NZ
+64 (7) 858-5174 (office)
+64 (7) 577-5304 (home office)
http://www.cms.waikato.ac.nz/~fracpete/
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