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[MRG] Change dataset for test_classifier_chain_vs_independent_models #9255

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Merged
merged 2 commits into from
Jul 4, 2017
Merged

[MRG] Change dataset for test_classifier_chain_vs_independent_models #9255

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29406f3
change dataset of ClassifierChain test
qinhanmin2014 Jun 30, 2017
ab983fc
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qinhanmin2014 Jul 1, 2017
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20 changes: 8 additions & 12 deletions sklearn/tests/test_multioutput.py
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Original file line number Diff line number Diff line change
Expand Up @@ -356,7 +356,8 @@ def generate_multilabel_dataset_with_correlations():
X, y = make_classification(n_samples=1000,
n_features=100,
n_classes=16,
n_informative=10)
n_informative=10,
random_state=0)

Y_multi = np.array([[int(yyy) for yyy in format(yy, '#06b')[2:]]
for yy in y])
Expand Down Expand Up @@ -470,22 +471,17 @@ def test_classifier_chain_vs_independent_models():
# Verify that an ensemble of classifier chains (each of length
# N) can achieve a higher Jaccard similarity score than N independent
# models
yeast = fetch_mldata('yeast')
X = yeast['data']
Y = yeast['target'].transpose().toarray()
X_train = X[:2000, :]
X_test = X[2000:, :]
Y_train = Y[:2000, :]
Y_test = Y[2000:, :]
X, Y = generate_multilabel_dataset_with_correlations()
X_train = X[:600, :]
X_test = X[600:, :]
Y_train = Y[:600, :]
Y_test = Y[600:, :]

ovr = OneVsRestClassifier(LogisticRegression())
ovr.fit(X_train, Y_train)
Y_pred_ovr = ovr.predict(X_test)

chain = ClassifierChain(LogisticRegression(),
order=np.array([0, 2, 4, 6, 8, 10,
12, 1, 3, 5, 7, 9,
11, 13]))
chain = ClassifierChain(LogisticRegression())
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Why the change in orderings?

chain.fit(X_train, Y_train)
Y_pred_chain = chain.predict(X_test)

Expand Down