number of selected attributes is wrong in this example

[srvanrell]

it should be 5 instead of 4, am I right?

data = loader.load_file(data_dir + "vote.arff")
data.class_is_last()

from weka.attribute_selection import ASSearch, ASEvaluation, AttributeSelection
search = ASSearch(classname="weka.attributeSelection.BestFirst", options=["-D", "1", "-N", "5"])
evaluator = ASEvaluation(classname="weka.attributeSelection.CfsSubsetEval", options=["-P", "1", "-E", "1"])
attsel = AttributeSelection()
attsel.search(search)
attsel.evaluator(evaluator)
attsel.select_attributes(data)

print("# attributes: " + str(attsel.number_attributes_selected))
print("selected: " + str(attsel.selected_attributes))
print("result string:\n" + attsel.results_string)

[fracpete]

5 including the class attribute, 4 excluding. The array that is returned by Weka contains the class attribute (#16).

[srvanrell]

Sorry, Peter, I noticed it late.
The enumeration used in weka vs the one used in python (zero based) confused me.
output wrapper: [ 2 3 9 10 16]
output in results string: 3,4,10,11