def optimize_boosting_decision_tree(training_features, training_classes, problem_name, depth_range, learning_rate_range):
def create_boosting_decision_tree(depth):
return sklearn.ensemble.AdaBoostClassifier(base_estimator=sklearn.tree.DecisionTreeClassifier(max_depth=depth))
max_depth = complexity_analysis.run_complexity_analysis('Boosting Decision Tree Max Depth for %s' % problem_name,
'Max Depth',
'Accuracy',
create_boosting_decision_tree,
depth_range,
training_features,
training_classes,
complexity_analysis.general_accuracy,
folds=5)
def create_boosting_decision_tree_learning_rate(learning_rate):
return sklearn.ensemble.AdaBoostClassifier(learning_rate=learning_rate, base_estimator=sklearn.tree.DecisionTreeClassifier(max_depth=max_depth))
learning_rate = complexity_analysis.run_complexity_analysis('Boosting Decision Tree Learning Rate for %s' % problem_name,
'Learning Rate',
'Accuracy',
create_boosting_decision_tree_learning_rate,
learning_rate_range,
training_features,
training_classes,
complexity_analysis.general_accuracy,
folds=5)
estimator = sklearn.ensemble.AdaBoostClassifier(learning_rate=learning_rate, base_estimator=sklearn.tree.DecisionTreeClassifier(max_depth=max_depth))
complexity_analysis.run_learning_curve_analysis(problem_name + ' Boosting Decision Tree', estimator, training_features, training_classes)
return estimator
def optimize_neural_network(training_features, training_classes, problem_name,
hidden_layer_sizes):
def create_neural_net_hidden_units(hidden_units):
return sklearn.neural_network.MLPClassifier(
hidden_layer_sizes=(hidden_units, ), max_iter=10000)
hidden_units = complexity_analysis.run_complexity_analysis(
'Neural Net Hidden Units for %s' % problem_name,
'Hidden Units',
'Accuracy',
create_neural_net_hidden_units,
hidden_layer_sizes,
training_features,
training_classes,
complexity_analysis.general_accuracy,
folds=5)
hidden_units = 5
learning_rate = 0.0001
def create_neural_net():
return sklearn.neural_network.MLPClassifier(
hidden_layer_sizes=(hidden_units, ),
activation='logistic',
max_iter=10000,
solver='sgd',
learning_rate='constant',
learning_rate_init=0.0001,
batch_size=10)
weight_updates(create_neural_net,
training_features,
training_classes,
max_iterations=50)
plot.savefig('%s_nn_weight_updates' %
problem_name.replace(' ', '_').lower())
complexity_analysis.run_learning_curve_analysis(problem_name + ' NN',
create_neural_net(),
training_features,
training_classes)
return sklearn.neural_network.MLPClassifier(
hidden_layer_sizes=(hidden_units, ),
learning_rate_init=learning_rate,
max_iter=10000)
def optimize_svm(training_features, training_classes, problem_name, gamma_range, C_range, degree_range):
def create_svc_gamma(gamma):
return sklearn.svm.SVC(gamma=gamma)
gamma = complexity_analysis.run_complexity_analysis('SVM gamma for %s' % problem_name,
'Gamma',
'Accuracy',
create_svc_gamma,
gamma_range,
training_features,
training_classes,
complexity_analysis.general_accuracy,
folds=5,
x_log_space=True)
def create_svc_C(c):
return sklearn.svm.SVC(gamma=gamma, C=c)
C = complexity_analysis.run_complexity_analysis('SVM C for %s' % problem_name,
'C',
'Accuracy',
create_svc_C,
C_range,
training_features,
training_classes,
complexity_analysis.general_accuracy,
folds=5,
x_log_space=True)
def create_svc_kernel(kernel):
return sklearn.svm.SVC(kernel=kernel)
complexity_analysis.run_complexity_analysis('SVM C for %s' % problem_name,
'kernel',
'Accuracy',
create_svc_kernel,
['linear', 'rbf'],
training_features,
training_classes,
complexity_analysis.general_accuracy,
folds=5)
complexity_analysis.run_learning_curve_analysis(problem_name + ' SVM', sklearn.svm.SVC(), training_features, training_classes)
return sklearn.svm.SVC()
def optimize_nearest_neighbors(training_features, training_classes,
problem_name, k_range, p_range):
def create_nearest_neighbor_k(k):
return sklearn.neighbors.KNeighborsClassifier(n_neighbors=k,
weights='distance')
k = complexity_analysis.run_complexity_analysis(
'K Nearest Neighbors for %s' % problem_name,
'# of Neighbors',
'Accuracy',
create_nearest_neighbor_k,
k_range,
training_features,
training_classes,
complexity_analysis.general_accuracy,
folds=5)
def create_nearest_neighbors_p(p):
return sklearn.neighbors.KNeighborsClassifier(n_neighbors=k,
weights='distance',
p=p)
p = complexity_analysis.run_complexity_analysis(
'Nearest Neighbors P for %s' % problem_name,
'P in Distance',
'Accuracy',
create_nearest_neighbors_p,
p_range,
training_features,
training_classes,
complexity_analysis.general_accuracy,
folds=5)
estimator = sklearn.neighbors.KNeighborsClassifier(n_neighbors=k,
weights='distance',
p=p)
complexity_analysis.run_learning_curve_analysis(
problem_name + ' Nearest Neighbors', estimator, training_features,
training_classes)
return estimator
def optimize_decision_tree(training_features,
training_classes,
problem_name,
depth_range,
number_features_range,
scorer=complexity_analysis.general_accuracy):
def create_decision_tree(depth):
return sklearn.tree.DecisionTreeClassifier(max_depth=depth)
max_depth = complexity_analysis.run_complexity_analysis(
'Decision Tree Max Depth for %s' % problem_name,
'Max Depth',
'Accuracy',
create_decision_tree,
depth_range,
training_features,
training_classes,
scorer,
folds=5)
def create_decision_tree_max_features(number_features):
return sklearn.tree.DecisionTreeClassifier(
max_depth=max_depth, max_features=number_features)
max_features = complexity_analysis.run_complexity_analysis(
'Decision Tree Max Features for %s' % problem_name,
'Max Features to Examine',
'Accuracy',
create_decision_tree_max_features,
number_features_range,
training_features,
training_classes,
scorer,
folds=5)
estimator = sklearn.tree.DecisionTreeClassifier(max_depth=max_depth,
max_features=max_features)
complexity_analysis.run_learning_curve_analysis(
problem_name + ' Decision Tree', estimator, training_features,
training_classes)
return estimator