diff options
Diffstat (limited to 'ml/dlib/tools/python/test/test_svm_c_trainer.py')
-rw-r--r-- | ml/dlib/tools/python/test/test_svm_c_trainer.py | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/ml/dlib/tools/python/test/test_svm_c_trainer.py b/ml/dlib/tools/python/test/test_svm_c_trainer.py new file mode 100644 index 000000000..ba9392e08 --- /dev/null +++ b/ml/dlib/tools/python/test/test_svm_c_trainer.py @@ -0,0 +1,65 @@ +from __future__ import division + +import pytest +from random import Random +from dlib import (vectors, vector, sparse_vectors, sparse_vector, pair, array, + cross_validate_trainer, + svm_c_trainer_radial_basis, + svm_c_trainer_sparse_radial_basis, + svm_c_trainer_histogram_intersection, + svm_c_trainer_sparse_histogram_intersection, + svm_c_trainer_linear, + svm_c_trainer_sparse_linear, + rvm_trainer_radial_basis, + rvm_trainer_sparse_radial_basis, + rvm_trainer_histogram_intersection, + rvm_trainer_sparse_histogram_intersection, + rvm_trainer_linear, + rvm_trainer_sparse_linear) + + +@pytest.fixture +def training_data(): + r = Random(0) + predictors = vectors() + sparse_predictors = sparse_vectors() + response = array() + for i in range(30): + for c in [-1, 1]: + response.append(c) + values = [r.random() + c * 0.5 for _ in range(3)] + predictors.append(vector(values)) + sp = sparse_vector() + for i, v in enumerate(values): + sp.append(pair(i, v)) + sparse_predictors.append(sp) + return predictors, sparse_predictors, response + + +@pytest.mark.parametrize('trainer, class1_accuracy, class2_accuracy', [ + (svm_c_trainer_radial_basis, 1.0, 1.0), + (svm_c_trainer_sparse_radial_basis, 1.0, 1.0), + (svm_c_trainer_histogram_intersection, 1.0, 1.0), + (svm_c_trainer_sparse_histogram_intersection, 1.0, 1.0), + (svm_c_trainer_linear, 1.0, 23 / 30), + (svm_c_trainer_sparse_linear, 1.0, 23 / 30), + (rvm_trainer_radial_basis, 1.0, 1.0), + (rvm_trainer_sparse_radial_basis, 1.0, 1.0), + (rvm_trainer_histogram_intersection, 1.0, 1.0), + (rvm_trainer_sparse_histogram_intersection, 1.0, 1.0), + (rvm_trainer_linear, 1.0, 0.6), + (rvm_trainer_sparse_linear, 1.0, 0.6) +]) +def test_trainers(training_data, trainer, class1_accuracy, class2_accuracy): + predictors, sparse_predictors, response = training_data + if 'sparse' in trainer.__name__: + predictors = sparse_predictors + cv = cross_validate_trainer(trainer(), predictors, response, folds=10) + assert cv.class1_accuracy == pytest.approx(class1_accuracy) + assert cv.class2_accuracy == pytest.approx(class2_accuracy) + + decision_function = trainer().train(predictors, response) + assert decision_function(predictors[2]) < 0 + assert decision_function(predictors[3]) > 0 + if 'linear' in trainer.__name__: + assert len(decision_function.weights) == 3 |