def main():
scalers = ['no', 'std', 'minmax']
root = 'Unsupervised_Anamaly_Detection_csv'
start = 0
counts = 90
CPUS = 3
CPUS_Models = 4
sklearn_models = [
'AvgKNN', 'LargestKNN', 'MedKNN', 'PCA', 'COF', 'LODA', 'LOF', 'HBOS',
'MCD', 'AvgBagging', 'MaxBagging', 'IForest', 'CBLOF', 'COPOD', 'SOD',
'LSCPwithLODA', 'AveLMDD', 'VarLMDD', 'IqrLMDD', 'SoGaal', 'MoGaal',
'VAE', 'AutoEncoder'
]
models = {
'BRM': BRM(bootstrap_sample_percent=70),
'GM': GaussianMixture(),
'IF': IsolationForest(),
'OCSVM': OneClassSVM(),
'EE': EllipticEnvelope(),
'AvgKNN': KNN(method='mean'),
'LargestKNN': KNN(method='largest'),
'MedKNN': KNN(method='median'),
'PCA': PCA(),
'COF': COF(),
'LODA': LODA(),
'LOF': LOF(),
'HBOS': HBOS(),
'MCD': MCD(),
'AvgBagging': FeatureBagging(combination='average'),
'MaxBagging': FeatureBagging(combination='max'),
'CBLOF': CBLOF(n_clusters=10, n_jobs=4),
'FactorAnalysis': FactorAnalysis(),
'KernelDensity': KernelDensity(),
'COPOD': COPOD(),
'SOD': SOD(),
'LSCPwithLODA': LSCP([LODA(), LODA()]),
'AveLMDD': LMDD(dis_measure='aad'),
'VarLMDD': LMDD(dis_measure='var'),
'IqrLMDD': LMDD(dis_measure='iqr'),
'SoGaal': SO_GAAL(),
'MoGaal': MO_GAAL(),
'VAE': VAE(encoder_neurons=[8, 4, 2]),
'AutoEncoder': AutoEncoder(hidden_neurons=[6, 3, 3, 6]),
'OCKRA': m_OCKRA(),
}
name = "30_Models"
Parallel(n_jobs=CPUS) \
(delayed(runByScaler)
(root, scaler, models, start, counts,
other_models=sklearn_models,
CPUS=CPUS_Models,
save_name=name)
for scaler in scalers)
def setUp(self):
self.n_train = 200
self.n_test = 100
self.contamination = 0.1
self.roc_floor = 0.8
self.X_train, self.y_train, self.X_test, self.y_test = generate_data(
n_train=self.n_train, n_test=self.n_test,
contamination=self.contamination, random_state=42)
self.clf = LODA(contamination=self.contamination)
self.clf.fit(self.X_train)
def model_init(self, model):
"""Model initialisation of a single model.
"""
if self.model == 'pca':
self.models[model] = PCA(contamination=self.contamination)
elif self.model == 'loda':
self.models[model] = LODA(contamination=self.contamination)
elif self.model == 'iforest':
self.models[model] = IForest(n_estimators=50,
bootstrap=True,
behaviour='new',
contamination=self.contamination)
elif self.model == 'cblof':
self.models[model] = CBLOF(n_clusters=3,
contamination=self.contamination)
elif self.model == 'feature_bagging':
self.models[model] = FeatureBagging(
base_estimator=PCA(contamination=self.contamination),
contamination=self.contamination)
elif self.model == 'copod':
self.models[model] = COPOD(contamination=self.contamination)
elif self.model == 'hbos':
self.models[model] = HBOS(contamination=self.contamination)
else:
self.models[model] = HBOS(contamination=self.contamination)
self.custom_model_scalers[model] = MinMaxScaler()
def models_init(self):
"""Models initialisation.
"""
self.model = self.configuration.get('model', 'pca')
if self.model == 'pca':
self.models = {
model: PCA(contamination=self.contamination)
for model in self.models_in_scope
}
elif self.model == 'loda':
self.models = {
model: LODA(contamination=self.contamination)
for model in self.models_in_scope
}
elif self.model == 'iforest':
self.models = {
model: IForest(n_estimators=50,
bootstrap=True,
behaviour='new',
contamination=self.contamination)
for model in self.models_in_scope
}
elif self.model == 'cblof':
self.models = {
model: CBLOF(n_clusters=3, contamination=self.contamination)
for model in self.models_in_scope
}
elif self.model == 'feature_bagging':
self.models = {
model: FeatureBagging(
base_estimator=PCA(contamination=self.contamination),
contamination=self.contamination)
for model in self.models_in_scope
}
elif self.model == 'copod':
self.models = {
model: COPOD(contamination=self.contamination)
for model in self.models_in_scope
}
elif self.model == 'hbos':
self.models = {
model: HBOS(contamination=self.contamination)
for model in self.models_in_scope
}
else:
self.models = {
model: HBOS(contamination=self.contamination)
for model in self.models_in_scope
}
self.custom_model_scalers = {
model: MinMaxScaler()
for model in self.models_in_scope
}
def __init__(self, *,
hyperparams: Hyperparams, #
random_seed: int = 0,
docker_containers: Dict[str, DockerContainer] = None) -> None:
super().__init__(hyperparams=hyperparams, random_seed=random_seed, docker_containers=docker_containers)
self._clf = LODA(contamination=hyperparams['contamination'],
n_bins=hyperparams['n_bins'],
n_random_cuts=hyperparams['n_random_cuts'],
)
return
def train(doc_list, dataset_name, clf_name):
model_roc = []
model_prc = []
if clf_name == "PCA":
clf = PCA()
elif clf_name == "MCD":
clf = MCD()
elif clf_name == "LOF":
clf = LOF()
elif clf_name == "KNN":
clf = KNN()
elif clf_name == "LODA":
clf = LODA()
for i in range(10):
data = pd.read_csv(doc_list[i], header=0, index_col=0)
train_x = data.drop(drop + ground_truth, axis=1).values
train_y = np.array([
transfor[x]
for x in list(_flatten(data[ground_truth].values.tolist()))
])
clf.fit(train_x)
predict = clf.decision_scores_
roc = roc_auc_score(train_y, predict)
prc = precision_n_scores(train_y, predict)
if ((i + 1) % 200 == 0):
print("第" + str(i + 1) + "个文件结果:")
evaluate_print(clf_name, train_y, predict)
model_roc.append(roc)
model_prc.append(prc)
model_roc_avg = np.mean(model_roc)
model_prc_avg = np.mean(model_prc)
print("模型" + clf_name + "在数据集" + dataset_name + "的平均roc_auc为" +
str(round(model_roc_avg, 4)) + ",平均prc为" +
str(round(model_prc_avg, 4)) + "。")
return model_roc_avg, model_prc_avg
def initialise_pyod_classifiers(self, outlier_fraction):
#Testing every query to every class and then predicting only if it belongs to the same class
classifiers = {}
#Proximity based
classifiers['K Nearest Neighbors (KNN)'] = []
classifiers['Average K Nearest Neighbors (AvgKNN)'] = []
classifiers['Median K Nearest Neighbors (MedKNN)'] = []
classifiers['Local Outlier Factor (LOF)'] = []
classifiers['Connectivity-Based Outlier Factor (COF)'] = []
#classifiers['Clustering-Based Local Outlier Factor (CBLOF)'] = []
classifiers['LOCI'] = []
#classifiers['Histogram-based Outlier Score (HBOS)'] = []
classifiers['Subspace Outlier Detection (SOD)'] = []
#Linear models
classifiers['Principal Component Analysis (PCA)'] = []
#classifiers['Minimum Covariance Determinant (MCD)'] = [] #To slow
classifiers['One-Class Support Vector Machines (OCSVM)'] = []
classifiers['Deviation-based Outlier Detection (LMDD)'] = []
#Probabilistic
classifiers['Angle-Based Outlier Detection (ABOD)'] = []
classifiers['Stochastic Outlier Selection (SOS)'] = []
#Outlier Ensembles
classifiers['Isolation Forest (IForest)'] = []
classifiers['Feature Bagging'] = []
classifiers['Lightweight On-line Detector of Anomalies (LODA)'] = []
for i in range(self.k_way):
for i in range(self.k_way):
classifiers['K Nearest Neighbors (KNN)'].append(
KNN(method='largest',
n_neighbors=int(self.n_shot / 3) + 1,
contamination=outlier_fraction))
classifiers['Average K Nearest Neighbors (AvgKNN)'].append(
KNN(method='mean',
n_neighbors=int(self.n_shot / 3) + 1,
contamination=outlier_fraction))
classifiers['Median K Nearest Neighbors (MedKNN)'].append(
KNN(method='median',
n_neighbors=int(self.n_shot / 3) + 1,
contamination=outlier_fraction))
classifiers['Local Outlier Factor (LOF)'].append(
LOF(n_neighbors=int(self.n_shot / 3) + 1,
contamination=outlier_fraction))
classifiers['Connectivity-Based Outlier Factor (COF)'].append(
COF(n_neighbors=int(self.n_shot / 3) + 1,
contamination=outlier_fraction))
classifiers['LOCI'].append(
LOCI(contamination=outlier_fraction))
classifiers['Subspace Outlier Detection (SOD)'].append(
SOD(n_neighbors=int(self.n_shot / 3) + 2,
contamination=outlier_fraction,
ref_set=max(2, int((int(self.n_shot / 3) + 2) / 3))))
classifiers['Principal Component Analysis (PCA)'].append(
PCA(contamination=outlier_fraction))
classifiers[
'One-Class Support Vector Machines (OCSVM)'].append(
OCSVM(contamination=outlier_fraction))
classifiers['Deviation-based Outlier Detection (LMDD)'].append(
LMDD(contamination=outlier_fraction))
classifiers['Angle-Based Outlier Detection (ABOD)'].append(
ABOD(contamination=outlier_fraction))
classifiers['Stochastic Outlier Selection (SOS)'].append(
SOS(contamination=outlier_fraction))
classifiers['Isolation Forest (IForest)'].append(
IForest(contamination=outlier_fraction))
classifiers['Feature Bagging'].append(
FeatureBagging(contamination=outlier_fraction))
classifiers[
'Lightweight On-line Detector of Anomalies (LODA)'].append(
LODA(contamination=outlier_fraction))
self.num_different_models = len(classifiers)
return classifiers
'Angle-based Outlier Detector (ABOD)':
ABOD(contamination=outliers_fraction),
'Cluster-based Local Outlier Factor':
CBLOF(n_clusters=10,
contamination=outliers_fraction,
check_estimator=False,
random_state=random_state),
'Histogram-base Outlier Detection (HBOS)':
HBOS(contamination=outliers_fraction),
'Isolation Forest':
IForest(contamination=outliers_fraction,
random_state=random_state),
'K Nearest Neighbors (KNN)':
KNN(contamination=outliers_fraction),
'Lightweight on-line detector of anomalies (LODA)':
LODA(contamination=outliers_fraction),
'Local Outlier Factor (LOF)':
LOF(contamination=outliers_fraction),
'One-class SVM (OCSVM)':
OCSVM(contamination=outliers_fraction),
'Principal Component Analysis (PCA)':
PCA(contamination=outliers_fraction, random_state=random_state),
'COD':
COD(contamination=outliers_fraction)
}
classifiers_indices = {
'Angle-based Outlier Detector (ABOD)': 0,
'Cluster-based Local Outlier Factor': 1,
'Histogram-base Outlier Detection (HBOS)': 2,
'Isolation Forest': 3,
'K Nearest Neighbors (KNN)': 4,
n_features=3,
contamination=contamination,
random_state=42)
# load pretrained models
prepare_trained_model()
# recommended models
selected_models = select_model(X_train, n_selection=100)
print("Showing the top recommended models...")
for i, model in enumerate(selected_models):
print(i, model)
print()
model_1 = LODA(n_bins=5, n_random_cuts=100)
print(
"1st model Average Precision",
average_precision_score(y_train,
model_1.fit(X_train).decision_scores_))
model_10 = LODA(n_bins=5, n_random_cuts=20)
print(
"10th model Average Precision",
average_precision_score(y_train,
model_10.fit(X_train).decision_scores_))
model_50 = OCSVM(kernel='sigmoid', nu=0.6)
print(
"50th model Average Precision",
average_precision_score(y_train,
def execute(self):
evaluation_results = []
print("Loading training data...")
data = pd.DataFrame()
for i, chunk in enumerate(
pd.read_csv(self.input_file,
header=None,
chunksize=self.chunk_size)):
print("Reading chunk: %d" % (i + 1))
#print(chunk)
data = data.append(chunk)
input_dimensionality = len(data.columns) - 1
print("Input Dimensionality: %d" % (input_dimensionality))
positive_data = data[data[len(data.columns) -
1] == 1].iloc[:, :len(data.columns) - 1]
negative_data = data[data[len(data.columns) -
1] == -1].iloc[:, :len(data.columns) - 1]
training_data = positive_data.sample(frac=0.70)
positive_validation_data = positive_data.drop(training_data.index)
if self.neg_cont and self.neg_cont > 0:
print("Negative Contamination: %0.4f" % (self.neg_cont))
num_negative = math.floor(
self.neg_cont *
(len(negative_data) + len(positive_validation_data)))
negative_data = data.sample(frac=1, random_state=200)[
data[len(data.columns) -
1] == -1].iloc[:num_negative, :len(data.columns) - 1]
negative_validation_data = negative_data.copy()
temp_positive = positive_validation_data.copy()
temp_positive[input_dimensionality] = 1
temp_negative = negative_data.copy()
temp_negative[input_dimensionality] = -1
validation_data_with_labels = pd.concat([temp_positive, temp_negative],
ignore_index=True)
validation_data = validation_data_with_labels.iloc[:, :len(data.columns
) - 1]
validation_labels = validation_data_with_labels.iloc[:, -1:].values
# Convert to tensor
positive_data = torch.tensor(positive_data.values).float().to(
self.device)
negative_data = torch.tensor(negative_data.values).float().to(
self.device)
training_data = torch.tensor(training_data.values).float()
validation_data = torch.tensor(validation_data.values).float()
print("Validation Data:")
print(validation_data)
## AE-D TRAINING ##
print("Initializing autoencoder...")
net = Autoencoder(layers=self.layers,
device=self.device,
add_syn=self.add_syn)
net.to(self.device)
print(net)
print("Training Stochastic Autoencoder...")
net.fit(training_data,
epochs=self.epochs,
lr=self.lr,
batch_size=self.batch_size)
predictions = net.predict(validation_data)
tp, tn, fp, fn, tpr, tnr, ppv, npv, ts, pt, acc, f1, mcc = performance_metrics(
validation_labels, predictions)
r = ["AE-D", tp, tn, fp, fn, tpr, tnr, ppv, npv, ts, pt, acc, f1, mcc]
evaluation_results.append(r)
print("AE-D Results:")
print(
tabulate([r], [
"ALGO", "TP", "TN", "FP", "FN", "TPR", "TNR", "PPV", "NPV",
"TS", "PT", "ACC", "F1", "MCC"
],
tablefmt="grid"))
# Convert back to CPU before other methods
validation_data = validation_data.cpu()
# Train only linear classifiers
if self.eval_cat == "linear":
print("Initiating training for linear detectors...")
## MCD ##
print("Training MCD...")
result = train_and_evaluate_classifier("MCD", MCD(),
validation_data,
validation_labels)
evaluation_results.append(result)
## ROBUST COVARIANCE ##
print("Training Robust Covariance...")
result = train_and_evaluate_classifier("ROB-COV",
EllipticEnvelope(),
validation_data,
validation_labels)
evaluation_results.append(result)
## ONE CLASS SVM TRAINING ##
print("Training OneClassSVM...")
result = train_and_evaluate_classifier(
"OC-SVM", svm.OneClassSVM(gamma="auto"), validation_data,
validation_labels)
evaluation_results.append(result)
elif self.eval_cat == "prob":
## ABOD ##
#print("Training ABOD...")
#result = train_and_evaluate_classifier("ABOD", ABOD(), validation_data, validation_labels)
#evaluation_results.append(result)
## SOS ##
#print("Training SOS...")
#result = train_and_evaluate_classifier("SOS", SOS(), validation_data, validation_labels)
#evaluation_results.append(result)
## COPOD ##
print("Training COPOD...")
result = train_and_evaluate_classifier("COPOD", COPOD(),
validation_data,
validation_labels)
evaluation_results.append(result)
elif self.eval_cat == "ensemble":
## ISOLATION FOREST TRAINING ##
print("Training Isolation Forest...")
result = train_and_evaluate_classifier(
"ISO-F", IsolationForest(random_state=0), validation_data,
validation_labels)
evaluation_results.append(result)
## LODA ##
print("Training LODA...")
result = train_and_evaluate_classifier("LODA", LODA(),
validation_data,
validation_labels)
evaluation_results.append(result)
## LSCP ##
# print("Training LSCP...")
# result = train_and_evaluate_classifier("LSCP", LSCP([LOF(), LOF()]), validation_data, validation_labels)
# evaluation_results.append(result)
elif self.eval_cat == "proximity":
## LOCAL OUTLIER FACTOR ##
print("Training Local Outlier Factor...")
result = train_and_evaluate_classifier(
"LOC-OF", LocalOutlierFactor(novelty=True), validation_data,
validation_labels)
evaluation_results.append(result)
## CBLOF ##
print("Training CBLOF...")
result = train_and_evaluate_classifier("CBLOF", CBLOF(),
validation_data,
validation_labels)
evaluation_results.append(result)
## HBOS ##
print("Training HBOS...")
result = train_and_evaluate_classifier("HBOS", HBOS(),
validation_data,
validation_labels)
evaluation_results.append(result)
elif self.eval_cat == "nn":
## VAE ##
print("Training VAE...")
result = train_and_evaluate_classifier(
"VAE",
VAE(encoder_neurons=self.layers,
decoder_neurons=self.layers.reverse()), validation_data,
validation_labels)
evaluation_results.append(result)
## SO_GAAL ##
print("Training SO_GAAL...")
result = train_and_evaluate_classifier(
"SO_GAAL", SO_GAAL(lr_d=self.lr, stop_epochs=self.epochs),
validation_data, validation_labels)
evaluation_results.append(result)
## MO_GAAL ##
print("Training MO_GAAL...")
result = train_and_evaluate_classifier(
"MO_GAAL", MO_GAAL(lr_d=self.lr, stop_epochs=self.epochs),
validation_data, validation_labels)
evaluation_results.append(result)
## EVALUATE RESULTS ##
if self.eval_cat != "none":
print("Aggregated Results:")
print(
tabulate(evaluation_results, [
"ALGO", "TP", "TN", "FP", "FN", "TPR", "TNR", "PPV", "NPV",
"TS", "PT", "ACC", "F1", "MCC"
],
tablefmt="grid"))
## DATASET METRICS ##
len_training_data_points = len(training_data)
len_positive_validations = len(positive_validation_data)
len_negative_validations = len(negative_validation_data)
len_validations = len_positive_validations + len_negative_validations
metrics_results = [
["Training Data Points", len_training_data_points],
["# Normal Points", len_positive_validations],
["# Anomalies", len_negative_validations],
[
"Contamination Percentage",
math.floor((len_negative_validations / len_validations) * 100)
]
]
## EVALUATE RESULTS ##
print(tabulate(metrics_results, ["Metric", "Value"], tablefmt="grid"))
if self.printout:
print("Saving results to %s" % (self.printout))
df = pd.DataFrame(evaluation_results)
df.to_csv(self.printout, header=None, index=False)
def generate_meta_features(X):
"""Get the meta-features of a datasets X
Parameters
----------
X : numpy array of shape (n_samples, n_features)
Input array
Returns
-------
meta_features : numpy array of shape (1, 200)
Meta-feature in dimension of 200
"""
# outliers_fraction = np.count_nonzero(y) / len(y)
# outliers_percentage = round(outliers_fraction * 100, ndigits=4)
X = check_array(X)
meta_vec = []
meta_vec_names = []
# on the sample level
n_samples, n_features = X.shape[0], X.shape[1]
meta_vec.append(n_samples)
meta_vec.append(n_features)
meta_vec_names.append('n_samples')
meta_vec_names.append('n_features')
sample_mean = np.mean(X)
sample_median = np.median(X)
sample_var = np.var(X)
sample_min = np.min(X)
sample_max = np.max(X)
sample_std = np.std(X)
q1, q25, q75, q99 = np.percentile(X, [0.01, 0.25, 0.75, 0.99])
iqr = q75 - q25
normalized_mean = sample_mean / sample_max
normalized_median = sample_median / sample_max
sample_range = sample_max - sample_min
sample_gini = gini(X)
med_abs_dev = np.median(np.absolute(X - sample_median))
avg_abs_dev = np.mean(np.absolute(X - sample_mean))
quant_coeff_disp = (q75 - q25) / (q75 + q25)
coeff_var = sample_var / sample_mean
outliers_15iqr = np.logical_or(X < (q25 - 1.5 * iqr), X >
(q75 + 1.5 * iqr))
outliers_3iqr = np.logical_or(X < (q25 - 3 * iqr), X > (q75 + 3 * iqr))
outliers_1_99 = np.logical_or(X < q1, X > q99)
outliers_3std = np.logical_or(X < (sample_mean - 3 * sample_std), X >
(sample_mean + 3 * sample_std))
percent_outliers_15iqr = np.sum(outliers_15iqr) / len(X)
percent_outliers_3iqr = np.sum(outliers_3iqr) / len(X)
percent_outliers_1_99 = np.sum(outliers_1_99) / len(X)
percent_outliers_3std = np.sum(outliers_3std) / len(X)
has_outliers_15iqr = np.any(outliers_15iqr).astype(int)
has_outliers_3iqr = np.any(outliers_3iqr).astype(int)
has_outliers_1_99 = np.any(outliers_1_99).astype(int)
has_outliers_3std = np.any(outliers_3std).astype(int)
meta_vec.extend([
sample_mean,
sample_median,
sample_var,
sample_min,
sample_max,
sample_std,
q1,
q25,
q75,
q99,
iqr,
normalized_mean,
normalized_median,
sample_range,
sample_gini,
med_abs_dev,
avg_abs_dev,
quant_coeff_disp,
coeff_var,
# moment_5, moment_6, moment_7, moment_8, moment_9, moment_10,
percent_outliers_15iqr,
percent_outliers_3iqr,
percent_outliers_1_99,
percent_outliers_3std,
has_outliers_15iqr,
has_outliers_3iqr,
has_outliers_1_99,
has_outliers_3std
])
meta_vec_names.extend([
'sample_mean',
'sample_median',
'sample_var',
'sample_min',
'sample_max',
'sample_std',
'q1',
'q25',
'q75',
'q99',
'iqr',
'normalized_mean',
'normalized_median',
'sample_range',
'sample_gini',
'med_abs_dev',
'avg_abs_dev',
'quant_coeff_disp',
'coeff_var',
# moment_5, moment_6, moment_7, moment_8, moment_9, moment_10,
'percent_outliers_15iqr',
'percent_outliers_3iqr',
'percent_outliers_1_99',
'percent_outliers_3std',
'has_outliers_15iqr',
'has_outliers_3iqr',
'has_outliers_1_99',
'has_outliers_3std'
])
###########################################################################
normality_k2, normality_p = normaltest(X)
is_normal_5 = (normality_p < 0.05).astype(int)
is_normal_1 = (normality_p < 0.01).astype(int)
meta_vec.extend(list_process(normality_p))
meta_vec.extend(list_process(is_normal_5))
meta_vec.extend(list_process(is_normal_1))
meta_vec_names.extend(list_process_name('normality_p'))
meta_vec_names.extend(list_process_name('is_normal_5'))
meta_vec_names.extend(list_process_name('is_normal_1'))
moment_5 = moment(X, moment=5)
moment_6 = moment(X, moment=6)
moment_7 = moment(X, moment=7)
moment_8 = moment(X, moment=8)
moment_9 = moment(X, moment=9)
moment_10 = moment(X, moment=10)
meta_vec.extend(list_process(moment_5))
meta_vec.extend(list_process(moment_6))
meta_vec.extend(list_process(moment_7))
meta_vec.extend(list_process(moment_8))
meta_vec.extend(list_process(moment_9))
meta_vec.extend(list_process(moment_10))
meta_vec_names.extend(list_process_name('moment_5'))
meta_vec_names.extend(list_process_name('moment_6'))
meta_vec_names.extend(list_process_name('moment_7'))
meta_vec_names.extend(list_process_name('moment_8'))
meta_vec_names.extend(list_process_name('moment_9'))
meta_vec_names.extend(list_process_name('moment_10'))
# note: this is for each dimension == the number of dimensions
skewness_list = skew(X).reshape(-1, 1)
skew_values = list_process(skewness_list)
meta_vec.extend(skew_values)
meta_vec_names.extend(list_process_name('skewness'))
# note: this is for each dimension == the number of dimensions
kurtosis_list = kurtosis(X)
kurtosis_values = list_process(kurtosis_list)
meta_vec.extend(kurtosis_values)
meta_vec_names.extend(list_process_name('kurtosis'))
correlation = np.nan_to_num(pd.DataFrame(X).corr(), nan=0)
correlation_list = flatten_diagonally(correlation)[0:int(
(n_features * n_features - n_features) / 2)]
correlation_values = list_process(correlation_list)
meta_vec.extend(correlation_values)
meta_vec_names.extend(list_process_name('correlation'))
covariance = np.cov(X.T)
covariance_list = flatten_diagonally(covariance)[0:int(
(n_features * n_features - n_features) / 2)]
covariance_values = list_process(covariance_list)
meta_vec.extend(covariance_values)
meta_vec_names.extend(list_process_name('covariance'))
# sparsity
rep_counts = []
for i in range(n_features):
rep_counts.append(len(np.unique(X[:, i])))
sparsity_list = np.asarray(rep_counts) / (n_samples)
sparsity = list_process(sparsity_list)
meta_vec.extend(sparsity)
meta_vec_names.extend(list_process_name('sparsity'))
# ANOVA p value
p_values_list = []
all_perm = list(itertools.combinations(list(range(n_features)), 2))
for j in all_perm:
p_values_list.append(f_oneway(X[:, j[0]], X[:, j[1]])[1])
anova_p_value = list_process(np.asarray(p_values_list))
# anova_p_value = np.mean(p_values_list)
# anova_p_value_exceed_thresh = np.mean((np.asarray(p_values_list)<0.05).astype(int))
meta_vec.extend(anova_p_value)
meta_vec_names.extend(list_process_name('anova_p_value'))
# pca
pca_transformer = sklearn_PCA(n_components=3)
X_transform = pca_transformer.fit_transform(X)
# first pc
pca_fpc = list_process(X_transform[0, :],
r_min=False,
r_max=False,
r_mean=False,
r_std=True,
r_skew=True,
r_kurtosis=True)
meta_vec.extend(pca_fpc)
meta_vec_names.extend(
['first_pca_std', 'first_pca_skewness', 'first_pca_kurtosis'])
# entropy
entropy_list = []
for i in range(n_features):
counts = pd.Series(X[:, i]).value_counts()
entropy_list.append(entropy(counts) / n_samples)
entropy_values = list_process(entropy_list)
meta_vec.extend(entropy_values)
meta_vec_names.extend(list_process_name('entropy'))
##############################Landmarkers######################################
# HBOS
clf = HBOS(n_bins=10)
clf.fit(X)
HBOS_hists = clf.hist_
HBOS_mean = np.mean(HBOS_hists, axis=0)
HBOS_max = np.max(HBOS_hists, axis=0)
HBOS_min = np.min(HBOS_hists, axis=0)
meta_vec.extend(list_process(HBOS_mean))
meta_vec.extend(list_process(HBOS_max))
meta_vec.extend(list_process(HBOS_min))
meta_vec_names.extend(list_process_name('HBOS_mean'))
meta_vec_names.extend(list_process_name('HBOS_max'))
meta_vec_names.extend(list_process_name('HBOS_min'))
# IForest
n_estimators = 100
clf = IForest(n_estimators=n_estimators)
clf.fit(X)
n_leaves = []
n_depth = []
fi_mean = []
fi_max = []
# doing this for each sub-trees
for i in range(n_estimators):
n_leaves.append(clf.estimators_[i].get_n_leaves())
n_depth.append(clf.estimators_[i].get_depth())
fi_mean.append(clf.estimators_[i].feature_importances_.mean())
fi_max.append(clf.estimators_[i].feature_importances_.max())
# print(clf.estimators_[i].tree_)
meta_vec.extend(list_process(n_leaves))
meta_vec.extend(list_process(n_depth))
meta_vec.extend(list_process(fi_mean))
meta_vec.extend(list_process(fi_max))
meta_vec_names.extend(list_process_name('IForest_n_leaves'))
meta_vec_names.extend(list_process_name('IForest_n_depth'))
meta_vec_names.extend(list_process_name('IForest_fi_mean'))
meta_vec_names.extend(list_process_name('IForest_fi_max'))
# PCA
clf = PCA(n_components=3)
clf.fit(X)
meta_vec.extend(clf.explained_variance_ratio_)
meta_vec.extend(clf.singular_values_)
meta_vec_names.extend(
['pca_expl_ratio_1', 'pca_expl_ratio_2', 'pca_expl_ratio_3'])
meta_vec_names.extend(['pca_sv_1', 'pca_sv_2', 'pca_sv_3'])
# LODA
n_bins = 10
n_random_cuts = 100
n_hists_mean = []
n_hists_max = []
n_cuts_mean = []
n_cuts_max = []
clf = LODA(n_bins=n_bins, n_random_cuts=n_random_cuts)
clf.fit(X)
for i in range(n_bins):
n_hists_mean.append(clf.histograms_[:, i].mean())
n_hists_max.append(clf.histograms_[:, i].max())
for i in range(n_random_cuts):
n_cuts_mean.append(clf.histograms_[i, :].mean())
n_cuts_max.append(clf.histograms_[i, :].max())
meta_vec.extend(list_process(n_hists_mean))
meta_vec.extend(list_process(n_hists_max))
meta_vec.extend(list_process(n_cuts_mean))
meta_vec.extend(list_process(n_cuts_max))
meta_vec_names.extend(list_process_name('LODA_n_hists_mean'))
meta_vec_names.extend(list_process_name('LODA_n_hists_max'))
meta_vec_names.extend(list_process_name('LODA_n_cuts_mean'))
meta_vec_names.extend(list_process_name('LODA_n_cuts_max'))
return meta_vec, meta_vec_names
'LSCPwithLODA', 'AveLMDD', 'VarLMDD', 'IqrLMDD', 'SoGaal', 'MoGaal', 'VAE',
'AutoEncoder'
]
models = {
'BRM': BRM(),
'GM': GaussianMixture(),
'IF': IsolationForest(),
'OCSVM': OneClassSVM(),
'EE': EllipticEnvelope(),
'AvgKNN': KNN(method='mean'),
'LargestKNN': KNN(method='largest'),
'MedKNN': KNN(method='median'),
'PCA': PCA(),
'COF': COF(),
'LODA': LODA(),
'LOF': LOF(),
'HBOS': HBOS(),
'MCD': MCD(),
'AvgBagging': FeatureBagging(combination='average'),
'MaxBagging': FeatureBagging(combination='max'),
'IForest': IForest(),
'CBLOF': CBLOF(n_clusters=10, n_jobs=4),
'FactorAnalysis': FactorAnalysis(),
'KernelDensity': KernelDensity(),
'COPOD': COPOD(),
'SOD': SOD(),
'LSCPwithLODA': LSCP([LODA(), LODA()]),
'AveLMDD': LMDD(dis_measure='aad'),
'VarLMDD': LMDD(dis_measure='var'),
'IqrLMDD': LMDD(dis_measure='iqr'),
def main():
# PART 1:
# Getting the predictions for each classifier
# SK means: The classifier is from sklearn or works like sklearn
# PY means: The classifier is from pyod or works like pyod
models = {
'SK_EE': EllipticEnvelope(),
'SK_GM': GaussianMixture(),
'SK_IF': IsolationForest(),
'SK_OCSVM': OneClassSVM(),
'SK_FA': FactorAnalysis(),
'SK_KD': KernelDensity(),
'PY_PCA': PCA(),
'PY_COF': COF(),
'PY_LODA': LODA(),
'PY_LOF': LOF(),
'PY_HBOS': HBOS(),
'PY_MCD': MCD(),
'PY_AvgKNN': KNN(method='mean'),
'PY_LargestKNN': KNN(method='largest'),
'PY_MedKNN': KNN(method='median'),
'PY_AvgBagging': FeatureBagging(combination='average'),
'PY_MaxBagging': FeatureBagging(combination='max'),
'PY_CBLOF': CBLOF(n_clusters=10, n_jobs=4),
'PY_COPOD': COPOD(),
'PY_SOD': SOD(),
'PY_LSCPwithLODA': LSCP([LODA(), LODA()]),
'PY_AveLMDD': LMDD(dis_measure='aad'),
'PY_VarLMDD': LMDD(dis_measure='var'),
'PY_IqrLMDD': LMDD(dis_measure='iqr'),
'PY_VAE': VAE(encoder_neurons=[8, 4, 2]),
'PY_AutoEncoder': AutoEncoder(hidden_neurons=[6, 3, 3, 6]),
'SK_BRM': BRM(bootstrap_sample_percent=70),
'SK_OCKRA': m_OCKRA(),
'PY_SoGaal': SO_GAAL(),
'PY_MoGaal': MO_GAAL()
}
ranker = ADRanker(data="datasets", models=models)
ranker.get_predictions()
# PART 2:
# After predictions, we can evaluate our classifiers using different scores
# You can add manually a new metric by modifying 'metrics.py'
ranker.get_scores(scores={'auc': Metrics.get_roc, 'ave': Metrics.get_ave})
# PART 3:
# Finally, it is time to summarize the results by plotting different graphs
# You can add your own graphs by modifying ' plots.py'
plot = Plots()
plot.make_plot_basic(paths=[
'results/scores/auc/no/results.csv',
'results/scores/auc/minmax/results.csv',
'results/scores/auc/std/results.csv',
'results/scores/ave/no/results.csv',
'results/scores/ave/minmax/results.csv',
'results/scores/ave/std/results.csv'
],
scalers=[
'Without scaler', 'Min max scaler',
'Standard scaler', 'Without scaler',
'Min max scaler', 'Standard scaler'
])
plot.make_cd_plot(
paths=[
'results/scores/auc/minmax/results.csv',
'results/scores/ave/no/results.csv',
'results/scores/auc/no/results.csv',
'results/scores/ave/no/results.csv',
'results/scores/auc/std/results.csv',
'results/scores/ave/std/results.csv'
],
names=[
'CD auc minmax scale', 'CD ave minmax scale', 'CD auc no scale',
'CD ave no scale', 'CD auc std scale', 'CD ave std scale'
],
titles=[
'CD diagram - AUC with min max scaling',
'CD diagram - Average precision with min max scaling',
'CD diagram - AUC without scaling',
'CD diagram - Average precision without scaling',
'CD diagram - AUC with standard scaling',
'CD diagram - Average precision with standard scaling'
])
y_pred = clf.labels_ # binary labels (0: inliers, 1: outliers)
y_scores = clf.decision_scores_ # raw outlier scores
evaluation(y, y_scores, clf_name)
all_scores['LOF'] = y_scores
clf_name = 'PCA'
clf = PCA(contamination=contam)
x_train = standardizer(x_train)
clf.fit(x_train)
y_pred = clf.labels_ # binary labels (0: inliers, 1: outliers)
y_scores = clf.decision_scores_ # raw outlier scores
evaluation(y, y_scores, clf_name)
all_scores['PCA'] = y_scores
clf_name = 'LODA'
clf = LODA(contamination=contam)
x_train = standardizer(x_train)
clf.fit(x_train)
y_pred = clf.labels_ # binary labels (0: inliers, 1: outliers)
y_scores = clf.decision_scores_ # raw outlier scores
evaluation(y, y_scores, clf_name)
all_scores['LODA'] = y_scores
pca = PCA(n_components=2)
kpca = KernelPCA(n_components=2, kernel="poly")
x_train_pca = kpca.fit_transform(x_train)
clf = KNN(n_neighbors=5, contamination=contam)
x_train_pca = standardizer(x_train_pca)
clf.fit(x_train_pca)
y_pred_pca = clf.labels_ # binary labels (0: inliers, 1: outliers)
y_scores = clf.decision_scores_ # raw outlier scores
begin = "2020-02-13"
end = "2020-02-15"
test_date = "2020-02-16"
KNN_clf = KNN(contamination=0.05)
PCA_clf = PCA(contamination=0.05)
VAE_clf = VAE(contamination=0.05, epochs=30, encoder_neurons=[9, 4], decoder_neurons=[4, 9])
LOF_clf = LOF(contamination=0.05)
IForest_clf = IForest(contamination=0.05)
AutoEncoder_clf = AutoEncoder(contamination=0.05, epochs=30, hidden_neurons=[9, 4, 4, 9])
FeatureBagging_clf = FeatureBagging(contamination=0.05, check_estimator=False)
ABOD_clf = ABOD(contamination=0.05)
HBOS_clf = HBOS(contamination=0.05)
CBLOF_clf = CBLOF(contamination=0.05)
LODA_clf = LODA(contamination=0.05)
MCD_clf = MCD(contamination=0.05)
MO_GAAL_clf = MO_GAAL(k=3, stop_epochs=2, contamination=0.05)
SO_GAAL_clf = SO_GAAL(contamination=0.05)
KNN_MAH_clf = None
S_models = ["KNN", "LOF", "PCA", "IForest", "HBOS", "LODA", "MCD", "CBLOF", "FeatureBagging", "ABOD", "KNN_MAH"]
K_models = ["AutoEncoder", "SO_GAAL", "VAE"]
def get_train_data():
"""
获取训练样本
:return: x_train 9特征训练样本
df 原训练数据
"""
acc_date = pd.date_range(begin, end, freq='1D')
else:
# grogger
df['arr86'] = (df['narr86'] >= 1).astype(int)
Y = df['arr86']
X = df[[
'pcnv', 'avgsen', 'tottime', 'ptime86', 'inc86', 'black', 'hispan',
'born60'
]]
print(i, X.shape, Y.shape)
if OD_Flag:
# clf = HBOS(contamination=0.05)
# clf = IForest(contamination=0.05)
clf = LODA(contamination=0.05)
clf.fit(X)
# remove outliers
X = X.loc[np.where(clf.labels_ == 0)]
Y = Y.loc[np.where(clf.labels_ == 0)]
X = sm.add_constant(X)
# general OLS
# https://www.statsmodels.org/stable/generated/statsmodels.regression.linear_model.OLS.html
# model=sm.OLS(Y, X.astype(float))
# robust regression
# https://www.statsmodels.org/stable/generated/statsmodels.robust.robust_linear_model.RLM.html
# model=sm.RLM(Y, X.astype(float))
# standardizing data for processing
X_train_norm, X_test_norm = standardizer(X_train, X_test)
classifiers = {'Angle-based Outlier Detector (ABOD)': ABOD(
contamination=outliers_fraction),
'Cluster-based Local Outlier Factor': CBLOF(
n_clusters=10,
contamination=outliers_fraction,
check_estimator=False,
random_state=random_state),
'Histogram-base Outlier Detection (HBOS)': HBOS(
contamination=outliers_fraction),
'Isolation Forest': IForest(contamination=outliers_fraction,
random_state=random_state),
'K Nearest Neighbors (KNN)': KNN(contamination=outliers_fraction),
'Lightweight on-line detector of anomalies (LODA)': LODA(contamination=outliers_fraction),
'Local Outlier Factor (LOF)': LOF(
contamination=outliers_fraction),
'One-class SVM (OCSVM)': OCSVM(contamination=outliers_fraction),
'Principal Component Analysis (PCA)': PCA(
contamination=outliers_fraction, random_state=random_state),
'COD': COD(contamination=outliers_fraction)
}
classifiers_indices = {
'Angle-based Outlier Detector (ABOD)': 0,
'Cluster-based Local Outlier Factor': 1,
'Histogram-base Outlier Detection (HBOS)': 2,
'Isolation Forest': 3,
'K Nearest Neighbors (KNN)': 4,
'Lightweight on-line detector of anomalies (LODA)': 5,
'Local Outlier Factor (LOF)': 6,
def compare(inputdata, labels, n_clusters, dset_name):
"""
Compute the AUC, Fgap, Frank score on all conventional outlier detectors for the given dataset
Args:
inputdata: input data
labels: ground truth outlier labels
n_clusters: number of clusters, for some cluster-based detectors
dset_name: dataset
Returns: AUC, Fgap, Frank
"""
print(
"Competing with conventional unsupervised outlier detection algorithms..."
)
random_state = np.random.RandomState(1)
if inputdata.shape[1] < 64:
AEneurons = [16, 8, 8, 16]
VAEneurons = [16, 8, 4], [4, 8, 16]
else:
AEneurons = [64, 32, 32, 64]
VAEneurons = [128, 64, 32], [32, 64, 128]
classifiers = {
'PCA':
PCA(random_state=random_state),
'AutoEncoder':
AutoEncoder(batch_size=100,
hidden_neurons=AEneurons,
random_state=random_state),
'VAE':
VAE(batch_size=100,
encoder_neurons=VAEneurons[0],
decoder_neurons=VAEneurons[1],
random_state=random_state),
'COPOD':
COPOD(),
'Iforest':
IForest(random_state=random_state),
'AutoEncoder':
AutoEncoder(batch_size=100, random_state=random_state),
'VAE':
VAE(batch_size=100, random_state=random_state),
'LODA':
LODA(),
'OCSVM':
OCSVM(),
'ABOD':
ABOD(n_neighbors=20),
'Fb':
FeatureBagging(random_state=random_state),
'CBLOF':
CBLOF(n_clusters=n_clusters,
check_estimator=False,
random_state=random_state),
'LOF':
LOF(),
'COF':
COF()
}
for clf_name, clf in classifiers.items():
print(f"Using {clf_name} method")
starttime = time.time()
clf.fit(inputdata)
time_taken = time.time() - starttime
test_scores = clf.decision_scores_
# -----fix some broken scores----- #
for i in range(len(test_scores)):
cur = test_scores[i]
if np.isnan(cur) or not np.isfinite(cur):
test_scores[i] = 0
np.save(f'{dset_name}/{clf_name}_raw.npy', test_scores)
auc = roc_auc_score(labels, test_scores)
print('AUC:', auc)
fetch(normalize(test_scores), f'../datasets/{dset_name.upper()}_Y.npy',
f'{dset_name}/attribute.npy')
print('time_taken:', time_taken)
def pyod_init(model, n_features=None):
# initial model set up
if model == 'abod':
from pyod.models.abod import ABOD
clf = ABOD()
elif model == 'auto_encoder' and n_features:
#import os
#os.environ['TF_CPP_MIN_LOG_LEVEL'] = '3'
from pyod.models.auto_encoder import AutoEncoder
clf = AutoEncoder(hidden_neurons=[
n_features, n_features * 5, n_features * 5, n_features
],
epochs=5,
batch_size=64,
preprocessing=False)
elif model == 'cblof':
from pyod.models.cblof import CBLOF
clf = CBLOF(n_clusters=4)
elif model == 'hbos':
from pyod.models.hbos import HBOS
clf = HBOS()
elif model == 'iforest':
from pyod.models.iforest import IForest
clf = IForest()
elif model == 'knn':
from pyod.models.knn import KNN
clf = KNN()
elif model == 'lmdd':
from pyod.models.lmdd import LMDD
clf = LMDD()
elif model == 'loci':
from pyod.models.loci import LOCI
clf = LOCI()
elif model == 'loda':
from pyod.models.loda import LODA
clf = LODA()
elif model == 'lof':
from pyod.models.lof import LOF
clf = LOF()
elif model == 'mcd':
from pyod.models.mcd import MCD
clf = MCD()
elif model == 'ocsvm':
from pyod.models.ocsvm import OCSVM
clf = OCSVM()
elif model == 'pca':
from pyod.models.pca import PCA
clf = PCA()
elif model == 'sod':
from pyod.models.sod import SOD
clf = SOD()
elif model == 'vae':
from pyod.models.vae import VAE
clf = VAE()
elif model == 'xgbod':
from pyod.models.xgbod import XGBOD
clf = XGBOD()
else:
#raise ValueError(f"unknown model {model}")
clf = PyODDefaultModel()
return clf
iterate_threshold = True
if __name__ == "__main__":
logging.basicConfig(
level=logging.INFO,
format="%(asctime)s P%(process)d %(levelname)s %(message)s",
)
# load dataset
data_dict = load_dataset(
dataset,
subdataset,
"all",
)
x_train = data_dict["train"]
x_test = data_dict["test"]
x_test_labels = data_dict["test_labels"]
# data preprocessing for MSCRED
od = LODA(n_bins=n_bins, n_random_cuts=n_random_cuts)
od.fit(x_train)
# get outlier scores
anomaly_score = od.decision_function(x_test)
anomaly_label = x_test_labels
# Make evaluation
evaluate_all(anomaly_score, anomaly_label)
def fit(self, X, shrink_cols = True, data_scaler = preprocessing.MaxAbsScaler(),
quick_methods = True, slow_methods = False, nn_methods = False,
contamination = 0.05, use_score_rank = False, random_state = None, verbose = 0):
if len(X.shape) > 2:
X = X.reshape(X.shape[0], X.shape[1]*X.shape[2])
elif len(X.shape) > 3:
raise ValueError("Expected number of dimensions: 2 or 3")
if shrink_cols:
X = X[:,~np.all(X == 0, axis=0)]
log.info('zero columns shrinked')
if data_scaler:
X = data_scaler.fit_transform(X)
log.info(f'used {data_scaler} data scaler')
#log.info(X[0:1,:])
n_rows = X.shape[0]
n_features = X.shape[1]
log.info (f'n_rows = {n_rows}, n_features = {n_features}')
quick_scores = np.zeros([n_rows, 0])
slow_scores = np.zeros([n_rows, 0])
nn_scores = np.zeros([n_rows, 0])
if quick_methods:
# Define anomaly detection tools to be compared
quick_classifiers = {
'PCA_randomized':
PCA(contamination=contamination, random_state=random_state,
standardization = False, svd_solver = 'randomized'),
'PCA_full':
PCA(contamination=contamination, random_state=random_state,
standardization = False, svd_solver = 'full'),
'COPOD':
COPOD(contamination=contamination),
f'HBOS':
HBOS(contamination=contamination),
f'HBOS_{200}':
HBOS(contamination=contamination, n_bins = 200),
f'HBOS_{300}':
HBOS(contamination=contamination, n_bins = 300),
'LODA':
LODA(contamination=contamination),
'LODA_200':
LODA(contamination=contamination, n_random_cuts = 200),
'LODA_300':
LODA(contamination=contamination, n_random_cuts = 300),
'IForest_100':
IForest(contamination=contamination, random_state=random_state,
n_estimators = 100, bootstrap = False, n_jobs = -1),
'IForest_200':
IForest(contamination=contamination, random_state=random_state,
n_estimators = 200, bootstrap = False, n_jobs = -1),
'IForest_bootstrap':
IForest(contamination = contamination, random_state=random_state,
n_estimators = 150, bootstrap = True, n_jobs = -1),
#'MCD':
# MCD(contamination=contamination, random_state=random_state, assume_centered = False),
#'MCD_centered':
# MCD(contamination=contamination, random_state=random_state, assume_centered = True),
f'CBLOF_16':
CBLOF(contamination=contamination, random_state=random_state, n_clusters = 16),
f'CBLOF_24':
CBLOF(contamination=contamination, random_state=random_state, n_clusters = 24),
f'CBLOF_32':
CBLOF(contamination=contamination, random_state=random_state, n_clusters = 32)
}
quick_scores = np.zeros([n_rows, len(quick_classifiers)])
for i, (clf_name, clf) in enumerate(quick_classifiers.items()):
log.info(f'{i+1} - fitting {clf_name}')
try:
clf.fit(X)
quick_scores[:, i] = clf.decision_scores_
except:
log.info(traceback.print_exc())
else:
log.info(f'Base detector {i+1}/{len(quick_classifiers)} is fitted for prediction')
quick_scores = np.nan_to_num(quick_scores)
if slow_methods:
# initialize a set of detectors for LSCP
detector_list = [LOF(n_neighbors=10), LOF(n_neighbors=15), LOF(n_neighbors=20)]
slow_classifiers = {
#'Angle-based Outlier Detector (ABOD)': #too slow and nan results
# ABOD(contamination=contamination),
#'One-class SVM (OCSVM)':
# OCSVM(contamination=contamination, cache_size = 2000, shrinking = False, tol = 1e-2),
#'LSCP': #slow and no parallel
# LSCP(detector_list, contamination=contamination, random_state=random_state, local_region_size = 30),
#'Feature Bagging': #ensemble #no real par
# FeatureBagging(LOF(n_neighbors=20), contamination=contamination,
# random_state=random_state, n_jobs = -1),
#'SOS' : # too memory inefficient
# SOS(contamination=contamination),
#'COF': # memory inefficient
# COF(contamination=contamination),
#'SOD':
# SOD(contamination = contamination),
#'KNN':
# KNN(contamination=contamination, n_jobs = -1),
#'KNN_50':
# KNN(contamination=contamination, leaf_size = 50, n_jobs = -1),
#'KNN_70':
# KNN(contamination=contamination, leaf_size = 70, n_jobs = -1),
'LOF_4':
LOF(n_neighbors=4, contamination=contamination, n_jobs = -1),
'LOF_5':
LOF(n_neighbors=5, contamination=contamination, n_jobs = -1),
'LOF_6':
LOF(n_neighbors=6, contamination=contamination, n_jobs = -1),
'LOF_7':
LOF(n_neighbors=7, contamination=contamination, n_jobs = -1),
'LOF_8':
LOF(n_neighbors=8, contamination=contamination, n_jobs = -1),
'LOF_9':
LOF(n_neighbors=9, contamination=contamination, n_jobs = -1),
'LOF_10':
LOF(n_neighbors=10, contamination=contamination, n_jobs = -1),
'LOF_12':
LOF(n_neighbors=12, contamination=contamination, n_jobs = -1),
'LOF_14':
LOF(n_neighbors=14, contamination=contamination, n_jobs = -1),
'LOF_16':
LOF(n_neighbors=16, contamination=contamination, n_jobs = -1),
'LOF_18':
LOF(n_neighbors=18, contamination=contamination, n_jobs = -1),
'LOF_20':
LOF(n_neighbors=20, contamination=contamination, n_jobs = -1),
'LOF_22':
LOF(n_neighbors=22, contamination=contamination, n_jobs = -1)
}
slow_scores = np.zeros([n_rows, len(slow_classifiers)])
for i, (clf_name, clf) in enumerate(slow_classifiers.items()):
log.info(f'{i+1} - fitting {clf_name}')
try:
clf.fit(X)
slow_scores[:, i] = clf.decision_scores_
except:
log.info(traceback.print_exc())
else:
log.info(f'Base detector {i+1}/{len(slow_classifiers)} is fitted for prediction')
slow_scores = np.nan_to_num(slow_scores)
if nn_methods:
nn_classifiers = {}
n_list = [1024, 512, 256, 128, 64, 32, 16, 8, 4, 2]
n_idx = next(x[0] for x in enumerate(n_list) if x[1] < n_features)
for i in range(3,6):
n_enc = n_list[n_idx:n_idx+i-1]
n_dec = n_enc[::-1]
n_enc_dec = n_enc + n_dec
nn_classifiers[f'FULL_AE_{len(n_enc + n_dec)}'] = {'clf': self.full_autoencoder,
'hidden_layers' : n_enc_dec
}
nn_classifiers[f'VAE_{len(n_enc_dec)}'] = {'clf': VAE(contamination = contamination, random_state = random_state,
encoder_neurons = n_enc, decoder_neurons = n_dec,
preprocessing = False, epochs = 32, verbosity = verbose),
'hidden_layers' : n_enc + n_dec
}
nn_scores = np.zeros([n_rows, len(nn_classifiers)])
for i, (clf_name, clf) in enumerate(nn_classifiers.items()):
log.info(f'''{i+1} - fitting {clf_name} with layers {clf['hidden_layers']}''')
try:
if clf['clf'] == self.full_autoencoder:
nn_scores[:, i] = clf['clf'](X, neurons_list = clf['hidden_layers'], verbose = verbose)
else:
clf['clf'].fit(X)
nn_scores[:, i] = clf['clf'].decision_scores_
except:
log.info(traceback.print_exc())
else:
log.info(f'Base detector {i+1}/{len(nn_classifiers)} is fitted for prediction')
nn_scores = np.nan_to_num(nn_scores)
all_scores = np.concatenate((quick_scores, slow_scores, nn_scores), axis=1)
all_scores = all_scores[:,~np.all(all_scores == 0, axis=0)]
log.info(f'total scores = {all_scores.shape[1]}')
all_scores_norm = np.copy(all_scores)
if use_score_rank:
all_scores_norm = np.apply_along_axis(rank_fun, 0, all_scores_norm)
log.info(f'score rank applied')
all_scores_norm = preprocessing.MinMaxScaler().fit_transform(all_scores_norm)
if all_scores_norm.shape[1] >= 12:
score_by_aom = aom(all_scores_norm, method = 'dynamic', n_buckets = round(all_scores_norm.shape[1]/4))
score_by_moa = moa(all_scores_norm, method = 'dynamic', n_buckets = round(all_scores_norm.shape[1]/4))
score_by_avg = np.mean(all_scores_norm, axis = 1)
score_by_max = np.max(all_scores_norm, axis = 1)
else:
score_by_avg = np.mean(all_scores_norm, axis = 1)
score_by_max = np.max(all_scores_norm, axis = 1)
score_by_aom = score_by_avg
score_by_moa = score_by_max
return score_by_aom, score_by_moa, score_by_max, score_by_avg, all_scores, all_scores_norm
clf.fit(X_train)
sklearn_score_anomalies = clf.decision_function(X_test)
original_paper_score = [-1 * s + 0.5 for s in sklearn_score_anomalies]
auc_svm_ws = evaluate.AUC(original_paper_score, y_test)
# --- LOF --- #
lof = LocalOutlierFactor(novelty=True)
lof.fit(X_train)
sklearn_score_anomalies = lof.decision_function(X_test)
original_paper_score = [-1 * s + 0.5 for s in sklearn_score_anomalies]
auc_lof_ws = evaluate.AUC(original_paper_score, y_test)
# --- LODA --- #
aucs_loda_ws = np.zeros(num_of_experiments)
for r in tqdm(range(num_of_experiments)):
loda = LODA()
loda.fit(X_train)
y_pred_proba_loda = np.zeros(X_test.shape[0])
for i in tqdm(range(X_test.shape[0])):
loda.fit(X_test[i, :].reshape(1, -1))
y_pred_proba_loda[i] = loda.decision_function(X_test[i, :].reshape(
1, -1))
aucs_loda_ws[r] = evaluate.AUC(1 - y_pred_proba_loda, y_test)
auc_loda_ws = np.mean(aucs_loda_ws)
# --- HalfSpaceTrees --- #
aucs_hst_ws = np.zeros(num_of_experiments)
for r in tqdm(range(num_of_experiments)):
hst = HalfSpaceTrees(n_features=X_train_hst.shape[1], n_estimators=100)
hst.fit(X_train_hst, np.zeros(X_train_hst.shape[0]))
y_pred_proba_hst = np.zeros(X_test_hst.shape[0])
class TestLODA(unittest.TestCase):
def setUp(self):
self.n_train = 200
self.n_test = 100
self.contamination = 0.1
self.roc_floor = 0.8
self.X_train, self.y_train, self.X_test, self.y_test = generate_data(
n_train=self.n_train,
n_test=self.n_test,
contamination=self.contamination,
random_state=42)
self.clf = LODA(contamination=self.contamination)
self.clf.fit(self.X_train)
def test_parameters(self):
assert (hasattr(self.clf, 'decision_scores_')
and self.clf.decision_scores_ is not None)
assert (hasattr(self.clf, 'labels_') and self.clf.labels_ is not None)
assert (hasattr(self.clf, 'threshold_')
and self.clf.threshold_ is not None)
assert (hasattr(self.clf, '_mu') and self.clf._mu is not None)
assert (hasattr(self.clf, '_sigma') and self.clf._sigma is not None)
assert (hasattr(self.clf, 'projections_')
and self.clf.projections_ is not None)
def test_train_scores(self):
assert_equal(len(self.clf.decision_scores_), self.X_train.shape[0])
def test_prediction_scores(self):
pred_scores = self.clf.decision_function(self.X_test)
# check score shapes
assert_equal(pred_scores.shape[0], self.X_test.shape[0])
# check performance
assert (roc_auc_score(self.y_test, pred_scores) >= self.roc_floor)
def test_prediction_labels(self):
pred_labels = self.clf.predict(self.X_test)
assert_equal(pred_labels.shape, self.y_test.shape)
def test_prediction_proba(self):
pred_proba = self.clf.predict_proba(self.X_test)
assert (pred_proba.min() >= 0)
assert (pred_proba.max() <= 1)
def test_prediction_proba_linear(self):
pred_proba = self.clf.predict_proba(self.X_test, method='linear')
assert (pred_proba.min() >= 0)
assert (pred_proba.max() <= 1)
def test_prediction_proba_unify(self):
pred_proba = self.clf.predict_proba(self.X_test, method='unify')
assert (pred_proba.min() >= 0)
assert (pred_proba.max() <= 1)
def test_prediction_proba_parameter(self):
with assert_raises(ValueError):
self.clf.predict_proba(self.X_test, method='something')
def test_fit_predict(self):
pred_labels = self.clf.fit_predict(self.X_train)
assert_equal(pred_labels.shape, self.y_train.shape)
def test_fit_predict_score(self):
self.clf.fit_predict_score(self.X_test, self.y_test)
self.clf.fit_predict_score(self.X_test,
self.y_test,
scoring='roc_auc_score')
self.clf.fit_predict_score(self.X_test,
self.y_test,
scoring='prc_n_score')
with assert_raises(NotImplementedError):
self.clf.fit_predict_score(self.X_test,
self.y_test,
scoring='something')
def test_model_clone(self):
clone_clf = clone(self.clf)
def tearDown(self):
pass
def get_detectors():
# randomness_flags = []
BASE_ESTIMATORS = [
LODA(n_bins=5, n_random_cuts=10),
LODA(n_bins=5, n_random_cuts=20),
LODA(n_bins=5, n_random_cuts=30),
LODA(n_bins=5, n_random_cuts=40),
LODA(n_bins=5, n_random_cuts=50),
LODA(n_bins=5, n_random_cuts=75),
LODA(n_bins=5, n_random_cuts=100),
LODA(n_bins=5, n_random_cuts=150),
LODA(n_bins=5, n_random_cuts=200),
LODA(n_bins=10, n_random_cuts=10),
LODA(n_bins=10, n_random_cuts=20),
LODA(n_bins=10, n_random_cuts=30),
LODA(n_bins=10, n_random_cuts=40),
LODA(n_bins=10, n_random_cuts=50),
LODA(n_bins=10, n_random_cuts=75),
LODA(n_bins=10, n_random_cuts=100),
LODA(n_bins=10, n_random_cuts=150),
LODA(n_bins=10, n_random_cuts=200),
LODA(n_bins=15, n_random_cuts=10),
LODA(n_bins=15, n_random_cuts=20),
LODA(n_bins=15, n_random_cuts=30),
LODA(n_bins=15, n_random_cuts=40),
LODA(n_bins=15, n_random_cuts=50),
LODA(n_bins=15, n_random_cuts=75),
LODA(n_bins=15, n_random_cuts=100),
LODA(n_bins=15, n_random_cuts=150),
LODA(n_bins=15, n_random_cuts=200),
LODA(n_bins=20, n_random_cuts=10),
LODA(n_bins=20, n_random_cuts=20),
LODA(n_bins=20, n_random_cuts=30),
LODA(n_bins=20, n_random_cuts=40),
LODA(n_bins=20, n_random_cuts=50),
LODA(n_bins=20, n_random_cuts=75),
LODA(n_bins=20, n_random_cuts=100),
LODA(n_bins=20, n_random_cuts=150),
LODA(n_bins=20, n_random_cuts=200),
LODA(n_bins=25, n_random_cuts=10),
LODA(n_bins=25, n_random_cuts=20),
LODA(n_bins=25, n_random_cuts=30),
LODA(n_bins=25, n_random_cuts=40),
LODA(n_bins=25, n_random_cuts=50),
LODA(n_bins=25, n_random_cuts=75),
LODA(n_bins=25, n_random_cuts=100),
LODA(n_bins=25, n_random_cuts=150),
LODA(n_bins=25, n_random_cuts=200),
LODA(n_bins=30, n_random_cuts=10),
LODA(n_bins=30, n_random_cuts=20),
LODA(n_bins=30, n_random_cuts=30),
LODA(n_bins=30, n_random_cuts=40),
LODA(n_bins=30, n_random_cuts=50),
LODA(n_bins=30, n_random_cuts=75),
LODA(n_bins=30, n_random_cuts=100),
LODA(n_bins=30, n_random_cuts=150),
LODA(n_bins=30, n_random_cuts=200),
ABOD(n_neighbors=3),
ABOD(n_neighbors=5),
ABOD(n_neighbors=10),
ABOD(n_neighbors=15),
ABOD(n_neighbors=20),
ABOD(n_neighbors=25),
ABOD(n_neighbors=50),
ABOD(n_neighbors=60),
ABOD(n_neighbors=75),
ABOD(n_neighbors=80),
ABOD(n_neighbors=90),
ABOD(n_neighbors=100),
IForest(n_estimators=10, max_features=0.1),
IForest(n_estimators=10, max_features=0.2),
IForest(n_estimators=10, max_features=0.3),
IForest(n_estimators=10, max_features=0.4),
IForest(n_estimators=10, max_features=0.5),
IForest(n_estimators=10, max_features=0.6),
IForest(n_estimators=10, max_features=0.7),
IForest(n_estimators=10, max_features=0.8),
IForest(n_estimators=10, max_features=0.9),
IForest(n_estimators=20, max_features=0.1),
IForest(n_estimators=20, max_features=0.2),
IForest(n_estimators=20, max_features=0.3),
IForest(n_estimators=20, max_features=0.4),
IForest(n_estimators=20, max_features=0.5),
IForest(n_estimators=20, max_features=0.6),
IForest(n_estimators=20, max_features=0.7),
IForest(n_estimators=20, max_features=0.8),
IForest(n_estimators=20, max_features=0.9),
IForest(n_estimators=30, max_features=0.1),
IForest(n_estimators=30, max_features=0.2),
IForest(n_estimators=30, max_features=0.3),
IForest(n_estimators=30, max_features=0.4),
IForest(n_estimators=30, max_features=0.5),
IForest(n_estimators=30, max_features=0.6),
IForest(n_estimators=30, max_features=0.7),
IForest(n_estimators=30, max_features=0.8),
IForest(n_estimators=30, max_features=0.9),
IForest(n_estimators=40, max_features=0.1),
IForest(n_estimators=40, max_features=0.2),
IForest(n_estimators=40, max_features=0.3),
IForest(n_estimators=40, max_features=0.4),
IForest(n_estimators=40, max_features=0.5),
IForest(n_estimators=40, max_features=0.6),
IForest(n_estimators=40, max_features=0.7),
IForest(n_estimators=40, max_features=0.8),
IForest(n_estimators=40, max_features=0.9),
IForest(n_estimators=50, max_features=0.1),
IForest(n_estimators=50, max_features=0.2),
IForest(n_estimators=50, max_features=0.3),
IForest(n_estimators=50, max_features=0.4),
IForest(n_estimators=50, max_features=0.5),
IForest(n_estimators=50, max_features=0.6),
IForest(n_estimators=50, max_features=0.7),
IForest(n_estimators=50, max_features=0.8),
IForest(n_estimators=50, max_features=0.9),
IForest(n_estimators=75, max_features=0.1),
IForest(n_estimators=75, max_features=0.2),
IForest(n_estimators=75, max_features=0.3),
IForest(n_estimators=75, max_features=0.4),
IForest(n_estimators=75, max_features=0.5),
IForest(n_estimators=75, max_features=0.6),
IForest(n_estimators=75, max_features=0.7),
IForest(n_estimators=75, max_features=0.8),
IForest(n_estimators=75, max_features=0.9),
IForest(n_estimators=100, max_features=0.1),
IForest(n_estimators=100, max_features=0.2),
IForest(n_estimators=100, max_features=0.3),
IForest(n_estimators=100, max_features=0.4),
IForest(n_estimators=100, max_features=0.5),
IForest(n_estimators=100, max_features=0.6),
IForest(n_estimators=100, max_features=0.7),
IForest(n_estimators=100, max_features=0.8),
IForest(n_estimators=100, max_features=0.9),
IForest(n_estimators=150, max_features=0.1),
IForest(n_estimators=150, max_features=0.2),
IForest(n_estimators=150, max_features=0.3),
IForest(n_estimators=150, max_features=0.4),
IForest(n_estimators=150, max_features=0.5),
IForest(n_estimators=150, max_features=0.6),
IForest(n_estimators=150, max_features=0.7),
IForest(n_estimators=150, max_features=0.8),
IForest(n_estimators=150, max_features=0.9),
IForest(n_estimators=200, max_features=0.1),
IForest(n_estimators=200, max_features=0.2),
IForest(n_estimators=200, max_features=0.3),
IForest(n_estimators=200, max_features=0.4),
IForest(n_estimators=200, max_features=0.5),
IForest(n_estimators=200, max_features=0.6),
IForest(n_estimators=200, max_features=0.7),
IForest(n_estimators=200, max_features=0.8),
IForest(n_estimators=200, max_features=0.9),
KNN(n_neighbors=1, method='largest'),
KNN(n_neighbors=5, method='largest'),
KNN(n_neighbors=10, method='largest'),
KNN(n_neighbors=15, method='largest'),
KNN(n_neighbors=20, method='largest'),
KNN(n_neighbors=25, method='largest'),
KNN(n_neighbors=50, method='largest'),
KNN(n_neighbors=60, method='largest'),
KNN(n_neighbors=70, method='largest'),
KNN(n_neighbors=80, method='largest'),
KNN(n_neighbors=90, method='largest'),
KNN(n_neighbors=100, method='largest'),
KNN(n_neighbors=1, method='mean'),
KNN(n_neighbors=5, method='mean'),
KNN(n_neighbors=10, method='mean'),
KNN(n_neighbors=15, method='mean'),
KNN(n_neighbors=20, method='mean'),
KNN(n_neighbors=25, method='mean'),
KNN(n_neighbors=50, method='mean'),
KNN(n_neighbors=60, method='mean'),
KNN(n_neighbors=70, method='mean'),
KNN(n_neighbors=80, method='mean'),
KNN(n_neighbors=90, method='mean'),
KNN(n_neighbors=100, method='mean'),
KNN(n_neighbors=1, method='median'),
KNN(n_neighbors=5, method='median'),
KNN(n_neighbors=10, method='median'),
KNN(n_neighbors=15, method='median'),
KNN(n_neighbors=20, method='median'),
KNN(n_neighbors=25, method='median'),
KNN(n_neighbors=50, method='median'),
KNN(n_neighbors=60, method='median'),
KNN(n_neighbors=70, method='median'),
KNN(n_neighbors=80, method='median'),
KNN(n_neighbors=90, method='median'),
KNN(n_neighbors=100, method='median'),
LOF(n_neighbors=1, metric='manhattan'),
LOF(n_neighbors=5, metric='manhattan'),
LOF(n_neighbors=10, metric='manhattan'),
LOF(n_neighbors=15, metric='manhattan'),
LOF(n_neighbors=20, metric='manhattan'),
LOF(n_neighbors=25, metric='manhattan'),
LOF(n_neighbors=50, metric='manhattan'),
LOF(n_neighbors=60, metric='manhattan'),
LOF(n_neighbors=70, metric='manhattan'),
LOF(n_neighbors=80, metric='manhattan'),
LOF(n_neighbors=90, metric='manhattan'),
LOF(n_neighbors=100, metric='manhattan'),
LOF(n_neighbors=1, metric='euclidean'),
LOF(n_neighbors=5, metric='euclidean'),
LOF(n_neighbors=10, metric='euclidean'),
LOF(n_neighbors=15, metric='euclidean'),
LOF(n_neighbors=20, metric='euclidean'),
LOF(n_neighbors=25, metric='euclidean'),
LOF(n_neighbors=50, metric='euclidean'),
LOF(n_neighbors=60, metric='euclidean'),
LOF(n_neighbors=70, metric='euclidean'),
LOF(n_neighbors=80, metric='euclidean'),
LOF(n_neighbors=90, metric='euclidean'),
LOF(n_neighbors=100, metric='euclidean'),
LOF(n_neighbors=1, metric='minkowski'),
LOF(n_neighbors=5, metric='minkowski'),
LOF(n_neighbors=10, metric='minkowski'),
LOF(n_neighbors=15, metric='minkowski'),
LOF(n_neighbors=20, metric='minkowski'),
LOF(n_neighbors=25, metric='minkowski'),
LOF(n_neighbors=50, metric='minkowski'),
LOF(n_neighbors=60, metric='minkowski'),
LOF(n_neighbors=70, metric='minkowski'),
LOF(n_neighbors=80, metric='minkowski'),
LOF(n_neighbors=90, metric='minkowski'),
LOF(n_neighbors=100, metric='minkowski'),
HBOS(n_bins=5, alpha=0.1),
HBOS(n_bins=5, alpha=0.2),
HBOS(n_bins=5, alpha=0.3),
HBOS(n_bins=5, alpha=0.4),
HBOS(n_bins=5, alpha=0.5),
HBOS(n_bins=10, alpha=0.1),
HBOS(n_bins=10, alpha=0.2),
HBOS(n_bins=10, alpha=0.3),
HBOS(n_bins=10, alpha=0.4),
HBOS(n_bins=10, alpha=0.5),
HBOS(n_bins=20, alpha=0.1),
HBOS(n_bins=20, alpha=0.2),
HBOS(n_bins=20, alpha=0.3),
HBOS(n_bins=20, alpha=0.4),
HBOS(n_bins=20, alpha=0.5),
HBOS(n_bins=30, alpha=0.1),
HBOS(n_bins=30, alpha=0.2),
HBOS(n_bins=30, alpha=0.3),
HBOS(n_bins=30, alpha=0.4),
HBOS(n_bins=30, alpha=0.5),
HBOS(n_bins=40, alpha=0.1),
HBOS(n_bins=40, alpha=0.2),
HBOS(n_bins=40, alpha=0.3),
HBOS(n_bins=40, alpha=0.4),
HBOS(n_bins=40, alpha=0.5),
HBOS(n_bins=50, alpha=0.1),
HBOS(n_bins=50, alpha=0.2),
HBOS(n_bins=50, alpha=0.3),
HBOS(n_bins=50, alpha=0.4),
HBOS(n_bins=50, alpha=0.5),
HBOS(n_bins=75, alpha=0.1),
HBOS(n_bins=75, alpha=0.2),
HBOS(n_bins=75, alpha=0.3),
HBOS(n_bins=75, alpha=0.4),
HBOS(n_bins=75, alpha=0.5),
HBOS(n_bins=100, alpha=0.1),
HBOS(n_bins=100, alpha=0.2),
HBOS(n_bins=100, alpha=0.3),
HBOS(n_bins=100, alpha=0.4),
HBOS(n_bins=100, alpha=0.5),
OCSVM(nu=0.1, kernel="linear"),
OCSVM(nu=0.2, kernel="linear"),
OCSVM(nu=0.3, kernel="linear"),
OCSVM(nu=0.4, kernel="linear"),
OCSVM(nu=0.5, kernel="linear"),
OCSVM(nu=0.6, kernel="linear"),
OCSVM(nu=0.7, kernel="linear"),
OCSVM(nu=0.8, kernel="linear"),
OCSVM(nu=0.9, kernel="linear"),
OCSVM(nu=0.1, kernel="poly"),
OCSVM(nu=0.2, kernel="poly"),
OCSVM(nu=0.3, kernel="poly"),
OCSVM(nu=0.4, kernel="poly"),
OCSVM(nu=0.5, kernel="poly"),
OCSVM(nu=0.6, kernel="poly"),
OCSVM(nu=0.7, kernel="poly"),
OCSVM(nu=0.8, kernel="poly"),
OCSVM(nu=0.9, kernel="poly"),
OCSVM(nu=0.1, kernel="rbf"),
OCSVM(nu=0.2, kernel="rbf"),
OCSVM(nu=0.3, kernel="rbf"),
OCSVM(nu=0.4, kernel="rbf"),
OCSVM(nu=0.5, kernel="rbf"),
OCSVM(nu=0.6, kernel="rbf"),
OCSVM(nu=0.7, kernel="rbf"),
OCSVM(nu=0.8, kernel="rbf"),
OCSVM(nu=0.9, kernel="rbf"),
OCSVM(nu=0.1, kernel="sigmoid"),
OCSVM(nu=0.2, kernel="sigmoid"),
OCSVM(nu=0.3, kernel="sigmoid"),
OCSVM(nu=0.4, kernel="sigmoid"),
OCSVM(nu=0.5, kernel="sigmoid"),
OCSVM(nu=0.6, kernel="sigmoid"),
OCSVM(nu=0.7, kernel="sigmoid"),
OCSVM(nu=0.8, kernel="sigmoid"),
OCSVM(nu=0.9, kernel="sigmoid"),
COF(n_neighbors=3),
COF(n_neighbors=5),
COF(n_neighbors=10),
COF(n_neighbors=15),
COF(n_neighbors=20),
COF(n_neighbors=25),
COF(n_neighbors=50),
]
# randomness_flags.extend([True] * 54) # LODA
# randomness_flags.extend([False] * 7) # ABOD
# randomness_flags.extend([True] * 81) # IForest
# randomness_flags.extend([False] * 36) # KNN
# randomness_flags.extend([False] * 36) # LOF
# randomness_flags.extend([False] * 40) # HBOS
# randomness_flags.extend([False] * 36) # OCSVM
# randomness_flags.extend([False] * 7) # COF
# return BASE_ESTIMATORS, randomness_flags
return BASE_ESTIMATORS
if __name__ == "__main__":
contamination = 0.1 # percentage of outliers
n_train = 200 # number of training points
n_test = 100 # number of testing points
# Generate sample data
X_train, X_test, y_train, y_test = \
generate_data(n_train=n_train,
n_test=n_test,
n_features=2,
contamination=contamination,
random_state=42)
# train LOCI detector
clf_name = 'LODA'
clf = LODA()
clf.fit(X_train)
# get the prediction labels and outlier scores of the training data
y_train_pred = clf.labels_ # binary labels (0: inliers, 1: outliers)
y_train_scores = clf.decision_scores_ # raw outlier scores
# get the prediction on the test data
y_test_pred = clf.predict(X_test) # outlier labels (0 or 1)
y_test_scores = clf.decision_function(X_test) # outlier scores
# evaluate and print the results
print("\nOn Training Data:")
evaluate_print(clf_name, y_train, y_train_scores)
print("\nOn Test Data:")
evaluate_print(clf_name, y_test, y_test_scores)
if __name__ == '__main__':
# Specify the root directory
rootDir = 'G:/My Drive/Github/ml-group-col/One-Class-models/Anomaly_Datasets_csv/'
# specify the random state
rs = 10
# Save how to run the models
models = [
(IsolationForest(random_state=rs), 'ISOF'),
(EllipticEnvelope(random_state=rs), 'EE'),
(LMDD(dis_measure='aad', random_state=rs), 'AAD_LMDD'),
(COPOD(), 'COPOD'),
(FeatureBagging(combination='average',
random_state=rs), 'AVE_Bagging'), # n_jobs
(LMDD(dis_measure='iqr', random_state=rs), 'IQR_LMDD'),
(KNN(method='largest'), 'Largest_KNN'), # n_jobs
(LODA(), 'LODA'),
(FeatureBagging(combination='max', n_jobs=-1,
random_state=rs), 'MAX_Bagging'),
(MCD(random_state=rs), 'MCD'),
(XGBOD(random_state=rs), 'XGBOD'), # n_jobs
(GaussianMixture(random_state=rs), 'GMM'),
(LocalOutlierFactor(novelty=True), 'LOF'),
(KNN(method='median'), 'Median_KNN'), # n_jobs
(KNN(method='mean'), 'Avg_KNN'), # n_jobs
(CBLOF(n_clusters=10, random_state=rs), 'CBLOF'),
(HBOS(), 'HBOS'),
(SOD(), 'SOD'),
(PCA(random_state=rs), 'PCA'),
(VAE(encoder_neurons=[3, 4, 3],
decoder_neurons=[3, 4, 3],
random_state=rs), 'VAE'),
