def classify_digits():
r"""Test that a nontrivial hierarchy leaf classification behaves as expected.
We build the following class hierarchy along with data from the handwritten digits dataset:
<ROOT>
/ \
A B
/ \ | \
1 7 C 9
/ \
3 8
"""
class_hierarchy = {
ROOT: ["A", "B"],
"A": ["1", "7"],
"B": ["C", "9"],
"C": ["3", "8"],
}
base_estimator = make_pipeline(
TruncatedSVD(n_components=24),
svm.SVC(
gamma=0.001,
kernel="rbf",
probability=True
),
)
clf = HierarchicalClassifier(
base_estimator=base_estimator,
class_hierarchy=class_hierarchy,
)
X, y = make_digits_dataset(
targets=[1, 7, 3, 8, 9],
as_str=False,
)
print(type(X), X.shape, X)
# cast the targets to strings so we have consistent typing of labels across hierarchy
y = y.astype(str)
print(type(y[0]), y.shape, y)
X_train, X_test, y_train, y_test = train_test_split(
X,
y,
test_size=0.2,
random_state=RANDOM_STATE,
)
clf.fit(X_train, y_train)
y_pred = clf.predict(X_test)
print("Classification Report:\n", classification_report(y_test, y_pred))
# Demonstrate using our hierarchical metrics module with MLB wrapper
with multi_labeled(y_test, y_pred, clf.graph_) as (y_test_, y_pred_, graph_):
h_fbeta = h_fbeta_score(
y_test_,
y_pred_,
graph_,
)
print("h_fbeta_score: ", h_fbeta)
def custom_h_fbeta(y_true, y_pred, graph=None):
with multi_labeled(y_true, y_pred,
graph) as (y_test_, y_pred_, graph_, classes_):
h_prec, h_rec, h_fbeta = h_fbeta_score(
y_test_,
y_pred_,
graph_,
)
return h_fbeta
def test_h_scores(graph, y_true, y_pred, expected_hr_score, expected_hp_score, expected_hf1_score):
"""Test the hR, hP, hF1 metrics on a few synthetic data test cases."""
with multi_labeled(y_true, y_pred, graph) as (y_true_, y_pred_, graph_):
assert_that(
h_recall_score(y_true=y_true_, y_pred=y_pred_, class_hierarchy=graph_),
is_(close_to(expected_hr_score, delta=0.0001)),
)
assert_that(
h_precision_score(y_true=y_true_, y_pred=y_pred_, class_hierarchy=graph_),
is_(close_to(expected_hp_score, delta=0.0001)),
)
assert_that(
h_fbeta_score(y_true=y_true_, y_pred=y_pred_, class_hierarchy=graph_),
is_(close_to(expected_hf1_score, delta=0.0001)),
)
def main(argv):
infile = argv[0]
outdir = argv[1]
if not os.path.exists(outdir):
os.makedirs(outdir)
# Read data file and retain data only corresponding to 5 sleep states
df = pd.read_csv(infile,
dtype={
'label': object,
'user': object,
'position': object,
'dataset': object
})
orig_cols = df.columns
sleep_states = ['Wake', 'NREM 1', 'NREM 2', 'NREM 3', 'REM']
df = df[df['label'].isin(sleep_states)].reset_index()
df = df[df['dataset'] == 'UPenn'].reset_index()
df = df[orig_cols]
print('... Number of data samples: %d' % len(df))
ctr = Counter(df['label'])
for cls in ctr:
print('%s: %d (%0.2f%%)' % (cls, ctr[cls], ctr[cls] * 100.0 / len(df)))
feat_cols = ['ENMO_mean','ENMO_std','ENMO_min','ENMO_max','ENMO_mad','ENMO_entropy1','ENMO_entropy2', 'ENMO_prevdiff', 'ENMO_nextdiff', \
'angz_mean','angz_std','angz_min','angz_max','angz_mad','angz_entropy1','angz_entropy2', 'angz_prevdiff', 'angz_nextdiff', \
'LIDS_mean','LIDS_std','LIDS_min','LIDS_max','LIDS_mad','LIDS_entropy1','LIDS_entropy2', 'LIDS_prevdiff', 'LIDS_nextdiff']
X = df[feat_cols].values
y = df['label']
groups = df['user']
# Class hierarchy for sleep stages
class_hierarchy = {
ROOT: {"Wake", "Sleep"},
"Sleep": {"NREM", "REM"},
"NREM": {"Light", "NREM 3"},
"Light": {"NREM 1", "NREM 2"}
}
graph = DiGraph(class_hierarchy)
outer_cv_splits = 5
inner_cv_splits = 3
factor = 10.0
results = {
'Wake': {
'precision': [],
'recall': [],
'fbeta': []
},
'Sleep': {
'precision': [],
'recall': [],
'fbeta': []
},
'REM': {
'precision': [],
'recall': [],
'fbeta': []
},
'NREM': {
'precision': [],
'recall': [],
'fbeta': []
},
'NREM 3': {
'precision': [],
'recall': [],
'fbeta': []
},
'Light': {
'precision': [],
'recall': [],
'fbeta': []
},
'NREM 1': {
'precision': [],
'recall': [],
'fbeta': []
},
'NREM 2': {
'precision': [],
'recall': [],
'fbeta': []
},
'Overall': {
'precision': [],
'recall': [],
'fbeta': []
}
}
# Outer CV
group_kfold = GroupKFold(n_splits=outer_cv_splits)
out_fold = 0
hierarchical_pred = []
for train_indices, test_indices in group_kfold.split(X, y, groups):
out_fold += 1
print('Processing fold ' + str(out_fold))
out_fold_X_train = X[train_indices, :]
out_fold_X_test = X[test_indices, :]
out_fold_y_train = y[train_indices]
out_fold_y_test = y[test_indices]
out_fold_users_test = groups[test_indices]
# Create a pipeline with scaler and hierarchical classifier
pipe = Pipeline([
('scaler', StandardScaler()),
(
'clf',
HierarchicalClassifier(
base_estimator=RandomForestClassifier(random_state=0,
n_estimators=100,
n_jobs=-1),
class_hierarchy=class_hierarchy,
prediction_depth='mlnp',
progress_wrapper=tqdm,
#stopping_criteria=0.7
))
])
# Inner CV
strat_kfold = StratifiedKFold(n_splits=inner_cv_splits,
random_state=0,
shuffle=True)
custom_cv_indices = []
for grp_train_idx, grp_test_idx in strat_kfold.split(
out_fold_X_train, out_fold_y_train):
custom_cv_indices.append((grp_train_idx, grp_test_idx))
print('Training')
search_params = {'clf__base_estimator__n_estimators':[50,100,200,300,500], \
'clf__base_estimator__max_depth': [5,10,None]}
cv_clf = RandomizedSearchCV(estimator=pipe, param_distributions=search_params, \
cv=custom_cv_indices, scoring=make_scorer(custom_h_fbeta,graph=graph), n_iter=5, \
n_jobs=-1, verbose=1)
cv_clf.fit(out_fold_X_train, out_fold_y_train)
print('Predicting')
out_fold_y_pred = cv_clf.predict(out_fold_X_test)
best_clf = cv_clf.best_estimator_
# Demonstrate using our hierarchical metrics module with MLB wrapper
with multi_labeled(out_fold_y_test, out_fold_y_pred, best_clf.named_steps['clf'].graph_) \
as (y_test_, y_pred_, graph_, classes_):
fold_h_prec, fold_h_rec, fold_h_fbeta = h_fbeta_score(
y_test_, y_pred_, graph_)
results['Overall']['precision'].append(fold_h_prec)
results['Overall']['recall'].append(fold_h_rec)
results['Overall']['fbeta'].append(fold_h_fbeta)
print("Fold %d: precision: %0.4f, recall: %0.4f, fbeta: %0.4f" %
(out_fold, fold_h_prec, fold_h_rec, fold_h_fbeta))
y_test_ = fill_ancestors(y_test_, graph=graph_)
y_pred_ = fill_ancestors(y_pred_, graph=graph_)
hierarchical_pred.append(
(out_fold_users_test, y_test_, y_pred_, classes_))
fold_wake_prec, fold_wake_rec, fold_wake_fbeta, _ = get_node_metrics(
y_test_, y_pred_, classes_, 'Wake')
fold_sleep_prec, fold_sleep_rec, fold_sleep_fbeta, _ = get_node_metrics(
y_test_, y_pred_, classes_, 'Sleep')
fold_rem_prec, fold_rem_rec, fold_rem_fbeta, _ = get_node_metrics(
y_test_, y_pred_, classes_, 'REM')
fold_nrem_prec, fold_nrem_rec, fold_nrem_fbeta, _ = get_node_metrics(
y_test_, y_pred_, classes_, 'NREM')
fold_nrem3_prec, fold_nrem3_rec, fold_nrem3_fbeta, _ = get_node_metrics(
y_test_, y_pred_, classes_, 'NREM 3')
fold_light_prec, fold_light_rec, fold_light_fbeta, _ = get_node_metrics(
y_test_, y_pred_, classes_, 'Light')
fold_nrem1_prec, fold_nrem1_rec, fold_nrem1_fbeta, _ = get_node_metrics(
y_test_, y_pred_, classes_, 'NREM 1')
fold_nrem2_prec, fold_nrem2_rec, fold_nrem2_fbeta, _ = get_node_metrics(
y_test_, y_pred_, classes_, 'NREM 2')
results['Wake']['precision'].append(fold_wake_prec)
results['Wake']['recall'].append(fold_wake_rec)
results['Wake']['fbeta'].append(fold_wake_fbeta)
results['Sleep']['precision'].append(fold_sleep_prec)
results['Sleep']['recall'].append(fold_sleep_rec)
results['Sleep']['fbeta'].append(fold_sleep_fbeta)
results['REM']['precision'].append(fold_rem_prec)
results['REM']['recall'].append(fold_rem_rec)
results['REM']['fbeta'].append(fold_rem_fbeta)
results['NREM']['precision'].append(fold_nrem_prec)
results['NREM']['recall'].append(fold_nrem_rec)
results['NREM']['fbeta'].append(fold_nrem_fbeta)
results['NREM 3']['precision'].append(fold_nrem3_prec)
results['NREM 3']['recall'].append(fold_nrem3_rec)
results['NREM 3']['fbeta'].append(fold_nrem3_fbeta)
results['Light']['precision'].append(fold_light_prec)
results['Light']['recall'].append(fold_light_rec)
results['Light']['fbeta'].append(fold_light_fbeta)
results['NREM 1']['precision'].append(fold_nrem1_prec)
results['NREM 1']['recall'].append(fold_nrem1_rec)
results['NREM 1']['fbeta'].append(fold_nrem1_fbeta)
results['NREM 2']['precision'].append(fold_nrem2_prec)
results['NREM 2']['recall'].append(fold_nrem2_rec)
results['NREM 2']['fbeta'].append(fold_nrem2_fbeta)
get_classification_report(results)
save_user_report(hierarchical_pred,
os.path.join(outdir, 'hierarchical_results.csv'))
def main(argv):
infile = argv[0]
modeldir = argv[1]
mode = argv[2]
ensemble = int(argv[3]) # 0 - use best model, 1 - use ensemble
outdir = argv[4]
df = pd.read_csv(infile)
method = 'feat_eng'
if mode == 'binary':
states = ['Wake', 'Sleep']
collate_states = ['NREM 1', 'NREM 2', 'NREM 3', 'REM']
df.loc[df['label'].isin(collate_states), 'label'] = 'Sleep'
elif mode == 'nonwear':
states = ['Wear', 'Nonwear']
collate_states = ['Wake', 'NREM 1', 'NREM 2', 'NREM 3', 'REM']
df.loc[df['label'].isin(collate_states), 'label'] = 'Wear'
elif mode == 'multiclass':
states = ['Wake', 'NREM 1', 'NREM 2', 'NREM 3', 'REM']
elif mode == 'hierarchical':
method = 'hierarchical'
states = ['Wake', 'NREM 1', 'NREM 2', 'NREM 3', 'REM', 'Nonwear']
# Class hierarchy for sleep stages
class_hierarchy = {
ROOT: {"Wear", "Nonwear"},
"Wear": {"Wake", "Sleep"},
"Sleep": {"NREM", "REM"},
"NREM": {"Light", "NREM 3"},
"Light": {"NREM 1", "NREM 2"}
}
graph = DiGraph(class_hierarchy)
classes = [node for node in graph.nodes if node != ROOT]
df = df[df['label'].isin(states)].reset_index()
feat_cols = [
'ENMO_mean', 'ENMO_std', 'ENMO_range', 'ENMO_mad', 'ENMO_entropy1',
'ENMO_entropy2', 'ENMO_prev30diff', 'ENMO_next30diff',
'ENMO_prev60diff', 'ENMO_next60diff', 'ENMO_prev120diff',
'ENMO_next120diff', 'angz_mean', 'angz_std', 'angz_range', 'angz_mad',
'angz_entropy1', 'angz_entropy2', 'angz_prev30diff', 'angz_next30diff',
'angz_prev60diff', 'angz_next60diff', 'angz_prev120diff',
'angz_next120diff', 'LIDS_mean', 'LIDS_std', 'LIDS_range', 'LIDS_mad',
'LIDS_entropy1', 'LIDS_entropy2', 'LIDS_prev30diff', 'LIDS_next30diff',
'LIDS_prev60diff', 'LIDS_next60diff', 'LIDS_prev120diff',
'LIDS_next120diff'
]
ts_test = df['timestamp']
x_test = df[feat_cols].values
y_test = df['label']
if mode != 'hierarchical':
y_test = np.array([states.index(i) for i in y_test])
users_test = df['user']
fnames_test = df['filename']
N = x_test.shape[0]
if ensemble:
model_fnames = os.listdir(modeldir)
model_fnames = [fname for fname in model_fnames if mode in fname]
nfolds = len(model_fnames)
for fold, fname in enumerate(model_fnames):
print('Processing fold ' + str(fold + 1))
if mode != 'hierarchical':
scaler, cv_clf = joblib.load(
open(os.path.join(modeldir, fname), 'rb'))
x_test_sc = scaler.transform(x_test)
fold_y_pred = cv_clf.predict_proba(x_test_sc)
if mode == 'multiclass':
fold_y_pred_collated = np.zeros(
(fold_y_pred[0].shape[0], len(fold_y_pred)))
for cls in range(len(fold_y_pred)):
fold_y_pred_collated[:, cls] = fold_y_pred[cls][:, 1]
fold_y_pred = fold_y_pred_collated
else:
cv_clf = pickle.load(open(os.path.join(modeldir, fname), 'rb'))
cv_clf = cv_clf.best_estimator_
fold_y_pred = cv_clf.predict(x_test)
fold_y_pred_prob = cv_clf.predict_proba(x_test)
with multi_labeled(y_test, fold_y_pred, cv_clf.named_steps['clf'].graph_) \
as (y_test_, y_pred_, graph_, classes_):
states = classes_
y_test_ = fill_ancestors(y_test_, graph=graph_)
fold_y_pred_ = np.zeros(fold_y_pred_prob.shape)
for new_idx, label in enumerate(classes_):
old_idx = classes.index(label)
fold_y_pred_[:, new_idx] = fold_y_pred_prob[:, old_idx]
fold_y_pred = fold_y_pred_
# Accumulate prediction probabilities
if fold == 0:
y_pred = np.zeros((N, len(states)))
y_pred += fold_y_pred
# Get average predictions
y_pred = y_pred / float(nfolds)
if mode == 'hierarchical':
y_test = y_test_
else:
if mode != 'hierarchical':
model_fnames = os.listdir(modeldir)
model_fname = [fname for fname in model_fnames if mode in fname][0]
scaler, clf = joblib.load(
open(os.path.join(modeldir, model_fname), 'rb'))
x_test_sc = scaler.transform(x_test)
y_pred = clf.predict_proba(x_test_sc)
# Save test results
y_pred = [(users_test, ts_test, fnames_test, y_test, y_pred)]
cv_save_classification_result(y_pred,
states,
os.path.join(
outdir,
mode + '_test_classification.csv'),
method=method)
def main(argv):
infile = argv[0]
dataset = argv[1]
outdir = argv[2]
resultdir = os.path.join(outdir, 'models')
if not os.path.exists(resultdir):
os.makedirs(resultdir)
# Read data file and retain data only corresponding to 5 sleep states
df = pd.read_csv(infile, dtype={'label':object, 'user':object,\
'position':object, 'dataset':object})
states = ['Wake','NREM 1','NREM 2','NREM 3','REM','Nonwear']
df = df[df['label'].isin(states)].reset_index()
print('... Number of data samples: %d' % len(df))
ctr = Counter(df['label'])
for cls in ctr:
print('%s: %d (%0.2f%%)' % (cls,ctr[cls],ctr[cls]*100.0/len(df)))
feat_cols = ['ENMO_mean','ENMO_std','ENMO_range','ENMO_mad',
'ENMO_entropy1','ENMO_entropy2', 'ENMO_prev30diff', 'ENMO_next30diff',
'ENMO_prev60diff', 'ENMO_next60diff', 'ENMO_prev120diff', 'ENMO_next120diff',
'angz_mean','angz_std','angz_range','angz_mad',
'angz_entropy1','angz_entropy2', 'angz_prev30diff', 'angz_next30diff',
'angz_prev60diff', 'angz_next60diff', 'angz_prev120diff', 'angz_next120diff',
'LIDS_mean','LIDS_std','LIDS_range','LIDS_mad',
'LIDS_entropy1','LIDS_entropy2', 'LIDS_prev30diff', 'LIDS_next30diff',
'LIDS_prev60diff', 'LIDS_next60diff', 'LIDS_prev120diff', 'LIDS_next120diff']
ts = df['timestamp']
X = df[feat_cols].values
y = df['label']
#y = np.array([states.index(i) for i in y])
groups = df['user']
fnames = df['filename']
feat_len = X.shape[1]
# Class hierarchy for sleep stages
class_hierarchy = {
ROOT : {"Wear", "Nonwear"},
"Wear" : {"Wake", "Sleep"},
"Sleep" : {"NREM", "REM"},
"NREM" : {"Light", "NREM 3"},
"Light" : {"NREM 1", "NREM 2"}
}
graph = DiGraph(class_hierarchy)
classes = [node for node in graph.nodes if node != ROOT]
outer_cv_splits = 5; inner_cv_splits = 5
factor = 10.0
# Outer CV
group_kfold = GroupKFold(n_splits=outer_cv_splits)
out_fold = 0
hierarchical_pred = []
for train_indices, test_indices in group_kfold.split(X,y,groups):
out_fold += 1
print('Processing fold ' + str(out_fold))
out_fold_X_train = X[train_indices,:]; out_fold_X_test = X[test_indices,:]
out_fold_y_train = y[train_indices]; out_fold_y_test = y[test_indices]
out_fold_users_test = groups[test_indices]
out_fold_ts_test = ts[test_indices]
out_fold_fnames_test = fnames[test_indices]
# Create a pipeline with scaler and hierarchical classifier
pipe = Pipeline([('scaler', StandardScaler()),
('clf', HierarchicalClassifier(
base_estimator=RandomForestClassifier(random_state=0, n_estimators=100, n_jobs=-1),
class_hierarchy=class_hierarchy,
prediction_depth='mlnp',
progress_wrapper=tqdm,
#stopping_criteria=0.7
))
])
# Inner CV
strat_kfold = StratifiedKFold(n_splits=inner_cv_splits,\
random_state=0, shuffle=True)
custom_cv_indices = []
for grp_train_idx, grp_test_idx in strat_kfold.split(out_fold_X_train,out_fold_y_train):
custom_cv_indices.append((grp_train_idx, grp_test_idx))
print('Training')
search_params = {'clf__base_estimator__n_estimators':[50,100,200,300,500,700], \
'clf__base_estimator__max_depth': [5,10,15,None]}
cv_clf = RandomizedSearchCV(estimator=pipe, param_distributions=search_params, \
cv=custom_cv_indices, scoring=make_scorer(custom_h_fbeta,graph=graph), n_iter=5, \
n_jobs=-1, verbose=1)
cv_clf.fit(out_fold_X_train, out_fold_y_train)
joblib.dump(cv_clf, os.path.join(resultdir,\
'fold'+str(out_fold)+'_hierarchical_RF.sav'))
print('Predicting')
out_fold_y_pred = cv_clf.predict(out_fold_X_test)
out_fold_y_pred_prob = cv_clf.predict_proba(out_fold_X_test)
best_clf = cv_clf.best_estimator_
# Demonstrate using our hierarchical metrics module with MLB wrapper
with multi_labeled(out_fold_y_test, out_fold_y_pred, best_clf.named_steps['clf'].graph_) \
as (y_test_, y_pred_, graph_, classes_):
states = classes_
y_test_ = fill_ancestors(y_test_, graph=graph_)
y_pred_ = fill_ancestors(y_pred_, graph=graph_)
y_pred_prob_ = np.zeros(out_fold_y_pred_prob.shape)
for new_idx, label in enumerate(classes_):
old_idx = classes.index(label)
y_pred_prob_[:,new_idx] = out_fold_y_pred_prob[:,old_idx]
hierarchical_pred.append((out_fold_users_test, out_fold_ts_test, out_fold_fnames_test,
y_test_, y_pred_prob_))
cv_save_classification_result(hierarchical_pred, states,
os.path.join(outdir, 'hierarchical_classification_results.csv'),
method = 'hierarchical')
