def run(self):
forest = RandomForest()
boost = GradientBoost()
train_x, train_y, test_x, test_y, feature_names = self.load(
"./data/parker_sleeps.csv")
forest.train(train_x, train_y, feature_names)
f_accuracy, forest_predictions = forest.predict(test_x, test_y)
print(" Results")
print("--------- Random Forest Technique --------- \n\n")
print("Feature number\tFeatures\tPrediction\tActual")
for i in range(len(test_x)):
print("{0}\t{1}\t{2}\t{3}".format(i, train_x.iloc[i].values,
forest_predictions[i],
test_y.iloc[i].values[0]))
print("\nRandom Forest Accuracy (MSE) {:.4f}".format(f_accuracy))
boost.train(train_x, train_y, feature_names)
b_accuracy, gb_predictions = boost.predict(test_x, test_y)
print("\n\n--------- Gradient Boost Technique --------- \n\n")
print("Feature number\tFeatures\tPrediction\tActual")
for i in range(len(test_x)):
print("{0}\t{1}\t{2:.2f}\t{3}".format(i, train_x.iloc[i].values,
gb_predictions[i],
test_y.iloc[i].values[0]))
print("\nGradient Boost Accuracy (MSE) {:.4f}".format(b_accuracy))
class Stacking():
def __init__(self):
pass
def fit(self, X, y):
self.rf = RandomForest(num_trees=15, max_depth=np.inf)
self.rf.fit(X, y)
y_rf = self.rf.predict(X)
self.nb = NaiveBayes()
self.nb.fit(X, y)
y_nb = self.nb.predict(X)
self.knn = KNN(k=3)
self.knn.fit(X, y)
y_knn = self.knn.predict(X)
newX = np.array([y_rf, y_nb, y_knn]).transpose()
model = DecisionTree(max_depth=np.inf,
stump_class=DecisionStumpErrorRate)
self.model = model
model.fit(newX, y)
def predict(self, X):
y_rf = self.rf.predict(X)
y_nb = self.nb.predict(X)
y_knn = self.knn.predict(X)
x_test = np.array([y_rf, y_nb, y_knn]).transpose()
return self.model.predict(x_test)
def main(argv):
if len(argv) != 3:
sys.exit(f"Usage python3 {argv[0]} <testing_file> <tree_json_dir>")
rna_ids, _, test_x = parse_data.read_data(argv[1],
skip_header=False,
delimiter=",")
json_files = glob.glob(f"{argv[2]}/*.json")
forest = RandomForest()
weights_filename = f"{argv[2]}/tree_weights.json"
json_files.remove(weights_filename)
weights = {}
with open(weights_filename, "r") as weights_file:
weights = json.loads(weights_file.read())
for filename in json_files:
with open(filename, "r") as tree_file:
tree = DecisionTree.from_json(tree_file.read())
forest.add_tree(tree)
forest.weights.append(weights[filename])
for i, x in enumerate(test_x):
prediction, confidence = forest.predict_with_confidence(x)
if prediction == 0.0:
confidence = 1 - confidence
print(f"{rna_ids[i]},{confidence}")
def main():
"""
N.B. Last DataFrame Column contains labels
"""
logger = logging.getLogger(__name__)
logger.debug('read data')
dframe_train = pd.read_excel(os.path.join(input_filepath, "train_data.xlsx"), index_col=0)
logger.debug('train model')
'''CREATE SINGLE TREE'''
d_t = DecisionTree(metrics = 'entropy') #max_depth = 8
#trained_dt = dt.build_tree(dframe,header)
#prediction = classify(small_train.values[0][:-1],t0)
'''CREATE RANDOM FOREST WITH TREES d_t'''
r_f = RandomForest(decision_tree_type=d_t, n_trees=20)
r_f = r_f.build_forest(dframe_train, n_selected_features="best", sample_ratio =.8)
'''GET MODEL ACCURACY ON VALIDATION DATA'''
logger.debug('get model accuracy')
dframe_val = pd.read_excel(os.path.join(input_filepath, "validate_data.xlsx"), index_col=0)
predictions_validation = r_f.get_model_accuracy(dframe_val.columns.values.tolist(), dframe_val)
#logger.debug('single prediction')
#rf.classify_forest(dframe_val.columns.values.tolist(),dframe_val.values[0],forest)
logger.debug('save model')
save_model(output_filepath, "model_00.npy", r_f)
def run_random_forest(data, target_column):
st.sidebar.title('Choose parameters for Random Forest')
ts = st.sidebar.slider('Training size', min_value=0.0, max_value=1.0, step=0.01, value=0.7)
n_estimators = st.sidebar.number_input('n_estimators', min_value=1, max_value=1000, step=1)
n_features = st.sidebar.number_input('n_features', min_value=1, max_value=len(data.columns)-1, step=1, value=len(data.columns)-1)
bootstrap_size = st.sidebar.number_input('bootstrap_size', min_value=1, max_value=int(len(data)*ts), step=1, value=int(len(data)*ts))
if st.sidebar.checkbox('Specify Depth'):
max_depth = st.sidebar.number_input('max_depth', min_value=1, max_value=int(len(data)*ts), step=1)
else:
max_depth = None
run_status = st.sidebar.button('Run Algorithm')
if run_status:
with st.spinner('Running...'):
x_train, x_test, y_train, y_test = train_test_split(data.drop([target_column], axis=1),
data[target_column],
test_size=1 - ts)
clf = RandomForest(n_estimators=n_estimators,
n_features=n_features,
max_depth=max_depth,
bootstrap_size=bootstrap_size)
clf.fit(x_train, y_train)
"""
## :dart: Accuracy
"""
st.subheader(accuracy_score(y_test, clf.predict(x_test)))
def validate(self, folds, num_trees):
attributes = folds[0][0]
ok = 0
error = 0
for fold in folds:
del fold[0]
for i in range(len(folds)):
folds_copy = copy.deepcopy(folds)
test = copy.deepcopy(folds_copy[i])
del folds_copy[i]
training = sum(folds_copy, [])
training.insert(0, attributes)
forest = RandomForest(copy.deepcopy(training))
trees = forest.get_forest(num_trees)
for instance in test:
real_class = instance[len(instance)-1]
del instance[len(instance)-1]
prediction = forest.predict(trees, instance)
if (prediction == real_class):
ok = ok + 1
else:
error = error + 1
print("Total: " + str(ok+error))
print("Corretas: " + str(ok))
print("Erradas: " + str(error))
print("Porcentagem: " + str(ok/(ok+error)))
def main(argv):
""" entry point to the program """
if len(argv) != 3:
sys.exit(f"Usage python3 {argv[0]} <testing_file> <tree_json_dir>")
_, test_y, test_x = parse_data.read_data(argv[1],
skip_header=False,
delimiter=",")
json_files = glob.glob(f"{argv[2]}/*.json")
forest = RandomForest()
for filename in json_files:
with open(filename, "r") as tree_file:
tree = DecisionTree.from_json(tree_file.read())
forest.add_tree(tree)
total_right = 0
for i, point in enumerate(test_x):
expected = forest.predict(point)
if test_y[i] == expected:
total_right += 1
accuracy = total_right / len(test_y)
print(f"Accuracy: {accuracy}")
def main():
predictorRF = RandomForest()
predicatorSVM = SVM()
predicatorLogistic_Regression = Logistic_Regression()
print('========Random Forest============')
predictorRF.run()
print('========SVM============')
predicatorSVM.run()
print('========Logistic Regression============')
predicatorLogistic_Regression.run()
def main():
columns, x_train, y_train, x_test, y_test = preprocessing()
random_forest_ID3 = RandomForest(columns[:-1], ['age', 'hours-per-week', 'capital-gain', 'capital-loss'],
Criterion.ID3, np.vstack((x_train, x_test)), 10)
decision_tree_ID3 = DecisionTreeClassifier(columns[:-1], ['age', 'hours-per-week', 'capital-gain', 'capital-loss'],
Criterion.ID3)
random_forest_GINI = RandomForest(columns[:-1], ['age', 'hours-per-week', 'capital-gain', 'capital-loss'],
Criterion.GINI, np.vstack((x_train, x_test)), 10)
decision_tree_GINI = DecisionTreeClassifier(columns[:-1], ['age', 'hours-per-week', 'capital-gain', 'capital-loss'],
Criterion.GINI)
decision_tree_ID3.set_attribute_values(np.vstack((x_train, x_test)))
decision_tree_GINI.set_attribute_values(np.vstack((x_train, x_test)))
validation = Validation(x_train, y_train, x_test, y_test)
print('K-fold validation:\n\n')
print('Criteri ID3:\n')
print('Random forest:\n')
score = validation.score_cross_val(3, random_forest_ID3)
print(f'Accuracy mitjana: {np.array(score[Measure.ACC]).mean()}\n')
print(f'Specificity mitjana: {np.array(score[Measure.SPEC]).mean()}\n')
print('Decision tree:\n')
score = validation.score_cross_val(3, decision_tree_ID3)
print(f'Accuracy mitjana: {np.array(score[Measure.ACC]).mean()}\n')
print(f'Specificity mitjana: {np.array(score[Measure.SPEC]).mean()}\n')
print('Criteri GINI:\n')
print('Random forest:\n')
score = validation.score_cross_val(3, random_forest_GINI)
print(f'Accuracy mitjana: {np.array(score[Measure.ACC]).mean()}\n')
print(f'Specificity mitjana: {np.array(score[Measure.SPEC]).mean()}\n')
print('Decision tree:\n')
score = validation.score_cross_val(3, decision_tree_GINI)
print(f'Accuracy mitjana: {np.array(score[Measure.ACC]).mean()}\n')
print(f'Specificity mitjana: {np.array(score[Measure.SPEC]).mean()}\n')
print('Final model: Random Forest\n')
print('Resultats finals: \n')
final_measure = validation.final_measure(random_forest_ID3)
print(f'Accuracy mitjana: {np.array(final_measure[Measure.ACC]).mean()}\n')
print(f'Specificity mitjana: {np.array(final_measure[Measure.SPEC]).mean()}\n')
print('\n\n Exemple d arbre de decisió entrenat amb totes les dades disponible a out/resultat.txt')
#Imprimim un arbre de decisió entrenat amb totes les dades, per visualitzar, tot i no ser el millor model
x_data = np.vstack((x_train, x_test))
y_data = np.hstack((y_train, y_test))
decision_tree_ID3.fit(x_data, y_data)
write_to_file(decision_tree_ID3)
def main(cl_args=sys.argv[1:]):
"""Main wrapper to run the classification app."""
args = parse_command_line_args(cl_args=cl_args)
datafile = os.path.realpath(args["data_path"])
testfile = os.path.realpath(args["test_path"])
output_root = os.path.realpath(args["output_path"])
random_seed = args["random_seed"]
info_level = "INFO"
if args["verbose"]:
info_level = "DEBUG"
# Configure the logger.
logging.basicConfig(format='%(asctime)s [%(levelname)s] %(name)s: %(message)s',
level=info_level)
num_trees = args["num_trees"]
if not os.path.exists(output_root):
os.makedirs(output_root)
# annotated training data
data = fileio(datafile)
# annotated test data
testdata=fileio(testfile)
# Invoking unit test for decision tree
if args["run_tests"]:
logger.info("Invoking test case for decision trees")
suite = unittest.TestLoader().loadTestsFromTestCase(TestDecisionTree)
unittest.TextTestRunner().run(suite)
sys.exit()
# Creating a set of test points from test data
test_points=[]
for line in testdata:
test_points.append(line[0:len(line)-1])
# Single decision tree for entire credit approval dataset
tree_credit = DecisionTree()
logger.info('Commencing single Decision Tree for credit approval data')
start_time = time.time()
tree_credit.build_tree(data)
end_time = time.time()
logger.info('time_lapsed: {:0.4f}'.format(end_time - start_time))
tree_credit.drawtree(jpeg=os.path.join(output_root, 'singletree.png'))
# Random forest of decision trees for the credit approval dataset
logger.info('Commencing single Random Forest for credit approval data')
forest = RandomForest(num_trees)
start_time = time.time()
forest.build_forest(data, output_path=output_root, seed=random_seed)
end_time = time.time()
logger.info('Time to build forest: {:0.4f}'.format(end_time - start_time))
evaluate(test_points, forest, testdata)
def run_randomforest(train_examples, train_labels, attributes, test_examples,
test_labels, n_trees):
amin, bim = get_data(train_examples, test_labels)
rforest = RandomForest(entropy, 2, n_trees, len(attributes))
if (bim > 0):
rforest.train_dataset(train_examples, attributes, train_labels)
else:
clabel = None
error = 0
if (amin == 0):
preds, error = rforest.test_dataset(test_examples, test_labels)
return error
def main():
data = datasets.load_digits()
X = data.data
y = data.target
X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.4)
print("X_train.shape:", X_train.shape)
print("Y_train.shape:", y_train.shape)
n_features = X_train.shape[1]
clf = RandomForest(n_estimators=100, max_features=int(np.sqrt(n_features)))
clf.fit(X_train, y_train)
y_pred = clf.predict(X_test)
accuracy = accuracy_score(y_test, y_pred)
print("Our RF Accuracy:", accuracy)
clf = ensemble.RandomForestClassifier(n_estimators=100,
max_features=int(
np.sqrt(n_features)))
clf.fit(X_train, y_train)
y_pred = clf.predict(X_test)
accuracy = accuracy_score(y_test, y_pred)
print("sklearn RF Accuracy:", accuracy)
def test_random_forest(self):
iris = load_iris()
X = iris['data']
y = iris['target']
X_train, X_test, y_train, y_test = train_test_split(X,
y,
test_size=0.2,
random_state=42)
model = RandomForest(num_trees=5, max_depth=5)
model.fit(X_train, y_train)
preds = model.predict(X_test)
score = accuracy_score(y_test, preds)
self.assertGreater(score, 0.9)
def cross_validation(dataset,
attributes,
percentage_train,
folds,
ntrees,
nattributes=-1,
depth_limit=None):
"""
:param dataset: the full dataset
:param attributes: the attributes
:param percentage_train: float, percentage of instances that needs to go to the train partition
:param folds: int, number of holdouts to execute
:param ntrees: int, number of trees for each ensemble
:param nattributes: int, number of sampled attributes (if -1, use sqrt(total))
:return: (average_performance, stddev_performance)
"""
if nattributes == -1:
nattributes = int(math.sqrt(len(dataset.columns)))
accuracies = []
precisions = []
recalls = []
for fold in range(1, folds + 1):
train_dataset, test_dataset = holdout(dataset, percentage_train)
rf = RandomForest(train_dataset, attributes, ntrees, nattributes,
depth_limit)
accuracy, precision, recall = test_RF(rf, test_dataset)
accuracies.append(accuracy)
precisions.append(precision)
recalls.append(recall)
return mean(accuracies), stdev(accuracies), mean(precisions), stdev(
precisions), mean(recalls), stdev(recalls)
def __init__(self, train_size=0.7):
self.predictors = [
MyLogisticRegression(scale_data=True),
RandomForest(6, 3, 200),
SVC()]
self.blender = MyKNN(type='classifier', use_weights=False) # DecisionTree(2, 1)
self.train_size = train_size
def evaluate_performance(trials=100):
filename = '../data/SPECTF.dat'
data = np.loadtxt(filename, delimiter=',')
X = data[:, 1:]
y = data[:, 0]
n, d = X.shape
accuracy_list = np.zeros(trials)
precision_list = np.zeros(trials)
recall_list = np.zeros(trials)
for trial in range(trials):
print 'Trial #', trial
# Random shuffle
idx = np.arange(n)
np.random.seed(np.int(time() / 150))
np.random.shuffle(idx)
X = X[idx]
Y = y[idx]
# Split Train and Test samples
train = np.int(0.8 * n)
Xtrain = X[:train, :]
Xtest = X[train:, :]
Ytrain = Y[:train]
Ytest = Y[train:]
clf = RandomForest(n_trees=30,
max_depth=100,
ratio_per_tree=0.7,
ratio_features=0.3)
clf.fit(Xtrain, Ytrain)
pred = clf.predict(Xtest)
accuracy_list[trial] = accuracy_score(Ytest, pred)
precision_list[trial] = precision(Ytest, pred)
recall_list[trial] = recall(Ytest, pred)
stats = np.zeros((3, 3))
stats[0, 0] = np.mean(accuracy_list)
stats[0, 1] = np.std(accuracy_list)
stats[1, 0] = np.mean(precision_list)
stats[1, 1] = np.std(precision_list)
stats[2, 0] = np.mean(recall_list)
stats[2, 1] = np.std(recall_list)
return stats
def run(self) -> None:
"""Creates a random forest model, trains it, and saves it."""
model = RandomForest(self.window_args, self.forest_args)
save_model(self.name, model)
self.signals.float_result.emit(model.accuracy)
def fit(self, X, y):
# instantiate the input models
rf = RandomForest(num_trees=15)
knn = KNN(k=3)
nb = NaiveBayes(num_classes=2)
# Random Forest fit and predict
rf.create_splits(X)
rf.fit(X, y)
rf_pred = rf.predict(X)
# K-Nearest Neighbors fit and predict
knn.fit(X, y)
knn_pred = knn.predict(X)
# Naive Bayes fit and predict
nb.fit(X, y)
nb_pred = nb.predict(X)
# use predictions from input models as inputs for meta-classifiers
meta_input = np.hstack((rf_pred.reshape(
(rf_pred.size, 1)), knn_pred.reshape(
(knn_pred.size, 1)), nb_pred.reshape((nb_pred.size, 1))))
# use Decision Tree as meta-classifier
dt = DecisionTree(max_depth=np.inf)
dt.fit(meta_input, y)
self.rf = rf
self.knn = knn
self.nb = nb
self.meta_classifier = dt
def run_forest(n_trees=400, n_features_per_tree=70, n_rows_power=0.5):
start_time = time.time()
forest = RandomForest(trainset, labels, n_trees, n_features_per_tree, n_rows_power)
forest.train()
score = []
for test, (i, bm) in zip(testset, benchmarkset):
result = forest.classify(test)
result = result.most_common(1)[0][0]
print('{:.1f}s -- No.{} should be: <{}> cal: {}'.format(time.time()-start_time, i, bm, result))
if result == bm:
score.append('+')
else:
score.append('-')
with open('result_by_self_train[28000].csv', 'a') as f:
f.write('{},{},<{}>\n'.format(i, result, bm))
# print('classify done {}, {:.1%}'.format(Counter(score), Counter(score)['+'] / len(score)))
return Counter(score)['+'] / len(score)
def fit_emotion(self, emotion_number, X, y):
binary_y = binarize_y(y, emotion_number)
tree = Tree()
if self.random_forest:
tree = RandomForest(num_of_trees=self.num_of_trees)
tree.fit(self.predictors, X, binary_y)
return tree
def init_model(model_type, delta, area_width):
if model_type == 'LR':
return LogisticRegression(delta, area_width)
elif model_type == 'DT':
return DecisionTree(delta)
elif model_type == 'RF':
return RandomForest(delta)
else:
raise SolverException('Invalid model type: ' + Fore.MAGENTA +
model_type + Fore.RESET)
def run_forest(n_trees=400, n_features_per_tree=70, n_rows_power=0.5):
start_time = time.time()
forest = RandomForest(trainset, labels, n_trees, n_features_per_tree,
n_rows_power)
forest.train()
score = []
for test, (i, bm) in zip(testset, benchmarkset):
result = forest.classify(test)
result = result.most_common(1)[0][0]
print('{:.1f}s -- No.{} should be: <{}> cal: {}'.format(
time.time() - start_time, i, bm, result))
if result == bm:
score.append('+')
else:
score.append('-')
with open('result_by_self_train[28000].csv', 'a') as f:
f.write('{},{},<{}>\n'.format(i, result, bm))
# print('classify done {}, {:.1%}'.format(Counter(score), Counter(score)['+'] / len(score)))
return Counter(score)['+'] / len(score)
def fit(self, X, y):
self.rf = RandomForest(num_trees=15, max_depth=np.inf)
self.rf.fit(X, y)
y_rf = self.rf.predict(X)
self.nb = NaiveBayes()
self.nb.fit(X, y)
y_nb = self.nb.predict(X)
self.knn = KNN(k=3)
self.knn.fit(X, y)
y_knn = self.knn.predict(X)
newX = np.array([y_rf, y_nb, y_knn]).transpose()
model = DecisionTree(max_depth=np.inf,
stump_class=DecisionStumpErrorRate)
self.model = model
model.fit(newX, y)
def run(self):
logger.info('Select tickers')
tickers = self.choose_ticker.random_tickers(self.number_of_tickers)
logger.info(f'The selected tickers are {tickers}')
for ticker in tickers:
# for ticker in ['MCHP']:
logger.info(f'Starting with ticker {ticker}')
data = self.data_loader.load(ticker)
self.graph_maker.plot_adjusted_prices(ticker, data)
data = self.technical_analysis.calculate(data)
logger.info(f'Technical analysis graphs')
train, test, validation, train_graph, test_graph, validation_graph = self.data_loader.transform(
data, number_of_past_points=self.number_of_past_points)
self.graph_maker.plot_train_test_val(
ticker, train_graph, test_graph, validation_graph)
for position, model_name in enumerate(
[element.get('model') for element in self.models_and_parameters]):
if model_name == 'feed_forward_neural_net':
model = FeedForwardNN(
dimension_of_first_layer=self.number_of_past_points * train[0][0].shape[1],
ticker=ticker,
overfitting_threshold=self.overfitting_threshold,
)
if model_name == 'random_forest':
model = RandomForest(
ticker=ticker, overfitting_threshold=self.overfitting_threshold)
if model_name == 'xgboost':
model = XGBoost(
ticker=ticker,
overfitting_threshold=self.overfitting_threshold)
if model_name == 'Arima':
model = Arima(
ticker=ticker,
overfitting_threshold=self.overfitting_threshold)
if model_name == 'regressors':
model = Regressors(
ticker=ticker,
overfitting_threshold=self.overfitting_threshold)
best_parameters, mse, trend_ratio, prediction, true_values, there_is_a_best_prediction = model.run(
train=train[::-1], val=validation[::-1], test=test[::-1], model_parameters=self.models_and_parameters[position])
logger.info(
f'The best scenario for a {model_name} is {best_parameters}, mse: {mse},'
f' ratio of trend {trend_ratio*100}')
if there_is_a_best_prediction:
self.graph_maker.plot_test_results(true_values, prediction, ticker, mse, model_name)
else:
logger.info(
f'No model could be fitted for {model_name} due to the '
f'overfitting threshold of {self.overfitting_threshold}')
def test_random_forest():
goal_attr = 'play'
attr = 'wind'
attr_universe = ['strong', 'weak']
attr_2 = 'wheather'
attr_2_univserse = ['sunny', 'cloudy', 'rainny']
attr_3 = 'temperature'
attr_3_universe = ['cold', 'norm', 'hot']
attr_4 = 'humidity'
attr_4_universe = ['norm', 'high']
df = {
goal_attr: [0, 0, 1, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1],
attr: ['weak', 'strong', 'weak', 'weak', 'weak', 'strong', 'strong', 'weak', 'weak', 'weak', 'strong', 'strong', 'weak'],
attr_2: ['sunny', 'sunny', 'cloudy', 'rainny', 'rainny', 'rainny', 'cloudy', 'sunny', 'sunny', 'rainny', 'sunny', 'cloudy', 'cloudy'],
attr_3: ['hot', 'hot', 'hot', 'norm', 'cold', 'cold', 'cold', 'norm', 'cold', 'norm', 'norm', 'norm', 'hot'],
attr_4: ['high', 'high', 'high', 'high', 'norm', 'norm',
'norm', 'high', 'norm', 'norm', 'norm', 'high', 'norm']
}
df = pd.DataFrame(df)
forest = RandomForest(shanon_gain)
forest.train(10, 1, 4, df, {goal_attr: [0, 1]}, {
attr: attr_universe, attr_2: attr_2_univserse, attr_3: attr_3_universe, attr_4: attr_4_universe})
case = {
attr: 'strong',
attr_2: 'rainny',
attr_3: 'norm',
attr_4: 'high'
}
result = forest.predict(case)
expected = 0
assert result == expected
class TestModelMethods(unittest.TestCase):
''' Test the methods of the random forest model wrapper.
Arguments:
unittest -- Python Unit Test Framework
'''
def setUp(self):
''' Test runner setup.
'''
self.rf = RandomForest()
self.rf.model_file = 'testModel.pth'
def testDataVariables(self):
''' Test whether feature and target variables are defined in the model.
'''
self.assertGreater(len(self.rf.features), 0)
self.assertGreater(len(self.rf.target), 0)
def testDataLoading(self):
''' Test the data loading.
'''
for dataset in ['train', 'val', 'test', 'full']:
self.assertGreater(len(self.rf.data[dataset]), 0)
self.assertGreater(len(self.rf.samples[dataset]), 0)
self.assertGreater(len(self.rf.labels[dataset]), 0)
def testSaveExistingModel(self):
''' Test the save method for a blank model.
'''
self.rf.model = RandomForestRegressor()
self.assertTrue(self.rf._saveModel())
def testSaveNonExistingModel(self):
''' Test the save method for a non existing model.
'''
self.rf.model = None
self.assertFalse(self.rf._saveModel())
def testLoadExisitngModel(self):
''' Test the load model for a previous saved model.
'''
self.rf._saveModel()
self.assertTrue(self.rf._loadModel())
def testLoadNonExisitngModel(self):
''' Test the load method for a non-existing model path.
'''
self.rf.model_file = 'non-existing/path.x'
self.assertFalse(self.rf._loadModel())
def testRF():
train_x, train_y, dev_x, dev_y, test_x, test_y, = util.loadTreeData()
RF = RandomForest(min_leaf_size=50, max_depth=10, num_trees=10)
RF.fit(train_x, train_y)
preds = RF.predict(train_x)
train_rf_rmse = util.findRMSE(preds, train_y)
preds = RF.predict(test_x)
test_rf_rmse = util.findRMSE(preds, test_y)
print('RF RMSE: \t', test_rf_rmse)
return train_rf_rmse, test_rf_rmse
def main():
parser = argparse.ArgumentParser(description='Random Forest parser')
parser.add_argument('--opt', help='test-benchmark or test-dataset.', required=True)
parser.add_argument('--dataset', help='The dataset filename.', default='', required=False)
parser.add_argument('--target_attribute', help='Target attribute to be predicted.', default='', required=False)
parser.add_argument('--n_trees', help='The number of trees. The default is 5.', default=5, type=int, required=False)
parser.add_argument('--n_attributes', help='The number of attributes. The default is the squared root of otal attributes.', default=-1, type=int, required=False)
parser.add_argument('--k_folds', help='The number of folds for cross validation. The default is 5', default=5, type=int, required=False)
parser.add_argument('--r', help='The number of repetitions for repeated cross validation. The default is 1', default=1, type=int, required=False)
args = parser.parse_args()
if args.opt == 'test-benchmark':
test_benchmark_categorical()
test_benchmark_numerical()
if args.opt == 'test-dataset':
if args.dataset == '' or not os.path.isfile(DATA_PATH + args.dataset):
print('Dataset not found.')
return
try:
with open(DATA_PATH + args.dataset[:-3] + 'json', 'r') as filetypes:
types = json.load(filetypes)
except:
print('Dataset types not found, automatic types will be used.')
types = {}
data = pd.read_csv(
DATA_PATH + args.dataset,
delimiter='\t' if args.dataset[-3:] == 'tsv' else ',',
dtype=types
)
if args.target_attribute not in data.columns:
print("Target attribute doesn't exist on dataset.")
return
n_trees = args.n_trees
n_random_attributes = args.n_attributes
if n_random_attributes == -1:
n_random_attributes = int((len(data.columns) - 1) ** 1/2)
cv = CrossValidator(
RandomForest(n_trees, args.target_attribute, n_random_attributes)
)
cv.cross_validate(data, args.k_folds, args.r)
print('\nGlobal accuracy: %.3f (%.3f)' % (cv.accuracy, cv.accuracy_std))
def construct_RF(self):
full_dataset = self.df
difficult_area = self.create_difficult_area()
critical_dataset = self.df.iloc[difficult_area]
rf1 = RandomForest(full_dataset, 5, self.s*(1-self.p))
trees_1 = rf1.construct_trees()
rf2 = RandomForest(critical_dataset, 5, self.s*self.p)
trees_2 = rf2.construct_trees()
trees = trees_1 + trees_2
return trees
def main():
X = list()
y = list()
XX = list() # Contains data features and data labels
numerical_cols = set([0,10,11,12,13,15,16,17,18,19,20]) # indices of numeric attributes (columns)
# Loading data set
print("reading input data")
with open("data.csv") as f:
next(f, None)
for line in csv.reader(f, delimiter=","):
xline = []
for i in range(len(line)):
if i in numerical_cols:
xline.append(ast.literal_eval(line[i]))
else:
xline.append(line[i])
X.append(xline[:-1])
y.append(xline[-1])
XX.append(xline[:])
# VERY IMPORTANT: Minimum forest_size should be 10
forest_size = 10
# Initializing a random forest.
randomForest = RandomForest(forest_size)
# Creating the bootstrapping datasets
print("creating the bootstrap datasets")
randomForest.bootstrapping(XX)
# Building trees in the forest
print("fitting the forest")
randomForest.fitting()
# Calculating an unbiased error estimation of the random forest
# based on out-of-bag (OOB) error estimate.
y_predicted = randomForest.voting(X)
# Comparing predicted and true labels
results = [prediction == truth for prediction, truth in zip(y_predicted, y)]
# Accuracy
accuracy = float(results.count(True)) / float(len(results))
print("accuracy: %.4f" % accuracy)
print("OOB estimate: %.4f" % (1-accuracy))
def train_model(model_name, X_train, Y_train, X_val, Y_val):
"""
Trains a supervised classifier using the training data provided, and scores
it using the validation dataset.
Param:
- model_name: a string containing a model type
- Train data:
- X_train
- Y_train
- Validation data:
- X_val
- Y_val
Return:
- model: a supervised classifier, to be used for testing
"""
if model_name == 'svm':
model = SVM()
elif model_name == "random_forest":
max_depth = 2
model = RandomForest(max_depth)
elif model_name == "neural_network":
max_depth = 2
out_size = 2
hidden_size = 30
in_size = X_train.shape[1]
model = NeuralNetwork(in_size, hidden_size, out_size)
elif model_name == "knn":
n_neighbors = 50
model = KNearestNeighbors(n_neighbors)
else:
return "Error: Model not yet implemented..."
print("Training " + model_name + "...")
train_score = model.train(X_train, Y_train)
valid_score = model.score(X_val, Y_val)
print("Training Accuracy: %s" % train_score)
print("Validation Accuracy: %s" % valid_score)
return model
booster.store_classification_result(out_file) print 'Extreme Gradient Boosting Completed. Labels saved. Moving Forward' ############## PART 3 ################# # 1. Xgboost - Gradient Boosting Machine print 'Beginning Extreme Gradient Boosting...' out_file = './data_final/part_3/xgboost.csv' '''Same Code as above''' booster.store_classification_result(out_file) print 'Extreme Gradient Boosting Completed. Labels saved. Moving Forward' # 2. Random Forest - Entropy Index print 'Beginning Random Forest Classfication (ENTROPY BASED) ...' out_file = './data_final/part_3/rf_entropy.csv' Kfold = 10 forest = RandomForest(Kfold,dataDir,'entropy') train_acc = forest.get_train_accuracy() print "Train Accuracy Random Forest (Entropy):%f \n" %(train_acc) forest.store_classification_result(out_file) print 'Random Forest Classfication Completed. Labels saved. Moving Forward.' # 3. Random Forest - Gini Index print 'Beginning Random Forest Classfication (GINI BASED) ...' out_file = './data_final/part_3/rf_gini.csv' Kfold = 10 forest = RandomForest(Kfold,dataDir,'gini') train_acc = forest.get_train_accuracy() print "Train Accuracy Random Forest (Gini) :%f \n" %(train_acc) forest.store_classification_result(out_file) print 'Random Forest Classfication Completed. Labels saved. All done.'
def apply_random_forest(filename):
rf = RandomForest(filename, estimators=500)
#rf.split_data()
rf.start_data()
rf.train_random_forest()
rf.test_random_forest()
rf.switch_folds()
rf.train_random_forest()
rf.test_random_forest()
X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.5)
# Rescale label for Adaboost to {-1, 1}
rescaled_y_train = 2*y_train - np.ones(np.shape(y_train))
rescaled_y_test = 2*y_test - np.ones(np.shape(y_test))
# .......
# SETUP
# .......
adaboost = Adaboost(n_clf = 8)
naive_bayes = NaiveBayes()
knn = KNN(k=4)
logistic_regression = LogisticRegression()
mlp = MultilayerPerceptron(n_hidden=20)
perceptron = Perceptron()
decision_tree = DecisionTree()
random_forest = RandomForest(n_estimators=150)
support_vector_machine = SupportVectorMachine(C=1, kernel=rbf_kernel)
# ........
# TRAIN
# ........
print "Training:"
print "\tAdaboost"
adaboost.fit(X_train, rescaled_y_train)
print "\tNaive Bayes"
naive_bayes.fit(X_train, y_train)
print "\tLogistic Regression"
logistic_regression.fit(X_train, y_train)
print "\tMultilayer Perceptron"
mlp.fit(X_train, y_train, n_iterations=20000, learning_rate=0.1)
print "\tPerceptron"
def main():
##### Part 1: Vanilla Logistic Regression ##### Private Score : 50%
# USE SHOBHIT's CODE
##### Part 2: XGBoost
'''
Kfold = 5
dataDir = "data"
booster = Xgboost(Kfold, dataDir)
train_acc = booster.get_train_accuracy()
print "Train Accuracy :%f \n" %(train_acc)
booster.store_classification_result()
'''
##### Part 3: Ensembler
print 'Beginning Ensembling....'
train_file = 'data/train.csv'
test_file = 'data/test.csv'
dataDir = 'data'
# 1. Logistic Regressor - balanced - Sparse Greedy Features
print 'Beginning Logistic Regression ...'
stupid_train_out_file = './data/results/lr_unbalanced_sparse_train.csv'
out_file = './data/ensemble_results/lr_unbalanced_sparse.csv'
clf = LogRes(train_file, test_file, stupid_train_out_file, out_file)
clf.feature_selection(64, [3])
print 'Logstic Regression Completed. Labels saved. Moving Forward.'
# 2. Random Forest - Entropy Index
print 'Beginning Random Forest Classfication (ENTROPY BASED) ...'
out_file = './data/ensemble_results/rf_entropy.csv'
Kfold = 10
forest = RandomForest(Kfold,dataDir,'entropy')
train_acc = forest.get_train_accuracy()
print "Train Accuracy Random Forest (Entropy):%f \n" %(train_acc)
forest.store_classification_result(out_file)
print 'Random Forest Classfication Completed. Labels saved. Moving Forward.'
'''
# 3. Random Forest - Gini Index
print 'Beginning Random Forest Classfication (GINI BASED) ...'
out_file = './data/ensemble_results/rf_gini.csv'
Kfold = 10
forest = RandomForest(Kfold,dataDir,'gini')
train_acc = forest.get_train_accuracy()
print "Train Accuracy Random Forest (Gini) :%f \n" %(train_acc)
forest.store_classification_result(out_file)
print 'Random Forest Classfication Completed. Labels saved. Moving Forward.'
# 4. Extra Trees - Entropy Index
print 'Beginning Extremely Randomized RF i.e Extra Trees (ENTROPY BASED)...'
out_file = './data/ensemble_results/extra_forest_entropy.csv'
Kfold = 10
trees = ExtraTrees(Kfold,dataDir,'entropy')
train_acc = trees.get_train_accuracy()
print "Train Accuracy Extra Trees (Entropy):%f \n" %(train_acc)
trees.store_classification_result(out_file)
print 'Extra Trees (ENTROPY) Completed. Labels saved. Moving Forward.'
# 5. Extra Trees - Gini Index
print 'Beginning Extremely Randomized RF i.e Extra Trees (GINI BASED)...'
out_file = './data/ensemble_results/extra_forest_gini.csv'
Kfold = 10
trees = ExtraTrees(Kfold,dataDir,'gini')
train_acc = trees.get_train_accuracy()
print "Train Accuracy Extra Trees (Gini):%f \n" %(train_acc)
trees.store_classification_result(out_file)
print 'Extra Trees (GINI) Completed. Labels saved. Moving Forward.'
'''
# 6. Xgboost - Gradient Boosting Machine
print 'Beginning Extreme Gradient Boosting...'
out_file = './data/ensemble_results/xgboost.csv'
Kfold = 7
booster = Xgboost(Kfold, dataDir)
train_acc = booster.get_train_accuracy()
print "Train Accuracy :%f \n" %(train_acc)
booster.store_classification_result(out_file)
print 'Extreme Gradient Boosting Completed. Labels saved'
print 'All models trained and test labels saved'
print 'All done... Exiting...'
print 'Exited'
# Load data
cur_states, actions, rewards, next_states, users, action_index, user_index, valid_feats = load_data(feat_path, target_action, num_users=num_users, num_users_ratio=num_users_ratio, demography=demography)
print cur_states.shape, next_states.shape, actions.shape, rewards.shape, users.shape, len(action_index), len(user_index), sum(valid_feats)
# dim: cur_states,next_states = num_instances x num_features
# dim: actions,rewards = num_instances
num_feats = cur_states.shape[1]
num_actions = len(action_index)
action_list = [ 0 for x in range(num_actions) ]
for a,i in action_index.iteritems(): action_list[i] = a
s0 = np.zeros((1,num_feats))
approximator = RandomForest(num_estimators=num_estimators, num_actions=num_actions)
approximator.train(cur_states, actions, rewards)
for iter in range(num_iters):
print "---------------------------------------------------------------\nIteration", iter
start_time = time.time()
qs = approximator.predict(next_states) # dim: num_actions x num_instances
max_qs = np.amax(qs, axis=0) # dim: num_instances
max_qs[actions==action_index[target_action]] = 0
approximator.train(cur_states, actions, rewards + discount * max_qs)
if debug_action_cnt:
max_as = np.argmax(qs, axis=0)
action_cnt = defaultdict(int)
for a in max_as: action_cnt[action_list[a]] += 1
print "action count: ", action_cnt
Copyright Brian Dolhansky 2014 [email protected] """ from random_forest import RandomForest from sklearn.datasets import fetch_mldata from data_utils import integral_to_indicator, split_train_test import numpy as np print "Loading data..." mnist = fetch_mldata('MNIST original', data_home='/home/bdol/data') train_data, test_data, train_target, test_target = split_train_test(mnist.data, mnist.target) train_target = integral_to_indicator(train_target) test_target_integral = integral_to_indicator(test_target) print "Done!" np.seterr(all='ignore') print "Training random forest..." rf = RandomForest(21, 10, 10, boot_percent=0.3, feat_percent=0.1, debug=False) rf.train(train_data, train_target) print "Done training!" print "Testing..." yhat = rf.test(test_data, test_target_integral) err = (np.sum(yhat != test_target[:, None]).astype(float))/test_target.shape[0] print "Error rate: {0}".format(err) print "Done!"