Albert Bifet created SAMOA-52:
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Summary: VHT performance problem with nominal attributes
Key: SAMOA-52
URL: https://issues.apache.org/jira/browse/SAMOA-52
Project: SAMOA
Issue Type: Bug
Components: SAMOA-API
Reporter: Albert Bifet
Assignee: Albert Bifet
When running artificial experiments using only nominal attributes with
{code}
generators.RandomTreeGenerator -c 2 -o 50 -u 0
{code}
2 classes, 50 nominal attributes, 0 numerical attributes, accuracy goes down
to 53%. However, in the case
{code}
generators.RandomTreeGenerator -c 2 -o 50 -u 0
{code}
with 50 numerical attributes, 0 nominal attributes, VHT is performing well with
95.42% of accuracy.
To reproduce:
{code}
bin/samoa local target/SAMOA-Local-0.4.0-incubating-SNAPSHOT.jar
"PrequentialEvaluation -d /tmp/dump.csv -i 1000000 -f 100000 -l
(classifiers.trees.VerticalHoeffdingTree -p 4) -s
(generators.RandomTreeGenerator -c 2 -o 50 -u 0)"
{code}
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