test_size=0.2,
random_state=99)
#2. 모델 구성
model = XGBRegressor(n_estimators=1000, learning_rate=0.1)
# n_estimators는 딥러닝의 epochs와 같음
#3. 훈련
model.fit(x_train,
y_train,
verbose=False,
eval_metric="rmse",
eval_set=[(x_train, y_train), (x_test, y_test)],
early_stopping_rounds=20)
# 딥러닝의 metrics가 있었음. 머신러닝의 지표는 rmse, mae, logloss, error(<=>acc), auc(정확도 acc의 친구)
# error가 0.8이면 acc가 0.2
#4. 평가
result = model.evals_result()
print("evals_result : \n", result)
# evals_result :
# {'validation_0': {'rmse': [22.09964, 20.094713, 18.289314]}, 'validation_1': {'rmse': [21.539825, 19.548641, 17.804596]}}
# validation_0 == (x_train,y_train)의 결과
# validation_1 == (x_test, y_test)의 결과
#5. 예측
y_pred = model.predict(x_test)
r2 = r2_score(y_pred, y_test)
print("R2 : ", r2)
# R2 : 0.823625251495531
# x, y = load_boston(return_X_y=True)
datasets = load_boston()
x = datasets.data
y = datasets['target']
x_train, x_test, y_train, y_test = train_test_split(x,
y,
test_size=0.2,
shuffle=True,
random_state=66)
# 2. 모델
model = XGBRegressor(n_estimators=100, learning_rate=0.01, n_jobs=8)
# 3. 훈련
model.fit(x_train,
y_train,
verbose=1,
eval_metric='rmse',
eval_set=[(x_train, y_train), (x_test, y_test)])
aaa = model.score(x_test, y_test)
print('aaa :', aaa)
y_pred = model.predict(x_test)
r2 = r2_score(y_test, y_pred)
print('r2 :', r2)
print('====================================')
results = model.evals_result()
print(results)
print(selection_x_train.shape)
selection_model = XGBRegressor(n_estimators=3, n_jobs=-1)
selection_model.fit(selection_x_train,
y_train,
verbose=False,
eval_metric=["rmse", "mae"],
eval_set=[(selection_x_train, y_train),
(selection_x_test, y_test)],
early_stopping_rounds=3)
y_pred = selection_model.predict(selection_x_test)
results = selection_model.evals_result()
print("evals_result : \n", results)
score = r2_score(y_test, y_pred)
print("Thresh=%.3f, n=%d, R2: %.2f%%" %
(thresh, selection_x_train.shape[1], score * 100.0))
# (404, 3)
# evals_result :
# {'validation_0': {'rmse': [17.212723, 12.439525, 9.133449], 'mae': [15.650868, 11.090322, 7.872841]},
# 'validation_1': {'rmse': [16.532173, 11.86516, 8.631524], 'mae': [15.215144, 10.711357, 7.452145]}}
eval_set = [(X_train, y_train), (X_val, y_val)]
xgb.fit(X_train,
y_train,
early_stopping_rounds=10,
eval_metric=["rmse"],
eval_set=eval_set,
verbose=True)
# make predictions for test data
y_pred = xgb.predict(X_test)
predictions = [round(value) for value in y_pred]
# evaluate predictions
r2_score = r2(y_test, predictions)
print("r2_score: %.2f%%" % (r2_score * 100.0))
# retrieve performance metrics
results = xgb.evals_result()
epochs = len(results['validation_0']['rmse'])
x_axis = range(0, epochs)
# plot log loss
fig, ax = pyplot.subplots()
ax.plot(x_axis, results['validation_0']['rmse'], label='Train')
ax.plot(x_axis, results['validation_1']['rmse'], label='Test')
ax.legend()
pyplot.ylabel('Root Mean Squared Error')
pyplot.title('XGBoost Root Mean Squared Error')
pyplot.show()
importances = pd.DataFrame({
'feature': X_train.columns,
'importance': np.round(xgb.feature_importances_, 3)
})
x_train, x_test, y_train, y_test = train_test_split(x,
y,
test_size=0.2,
shuffle=True,
random_state=66)
#2. 모델
model = XGBRegressor(n_estimators=100, learning_rate=0.01, n_jobs=-1)
#3. 훈련
model.fit(x_train,
y_train,
verbose=1,
eval_metric=['rmse', 'logloss', 'mae'],
eval_set=[(x_train, y_train), (x_test, y_test)])
#4. 평가
aaa = model.score(x_test, y_test)
print("aaa : ", aaa)
y_pred = model.predict(x_test)
r2 = r2_score(y_test, y_pred) #r2잡을 때 원 데이터가 앞으로 가게?
print("r2 : ", r2)
# aaa : 0.9329663244922279
# r2 : 0.9329663244922279
print("=======================")
results = model.evals_result() # 터미널에서 훈련 셋 지표(rmse)가 줄어드는 과정 표기
print(results)
def xgboost_regress(X_train,
y_train,
X_test,
y_test,
early_stopping_rounds=None,
plot=True):
# Build fit model
XG = XGBRegressor(objective='reg:squarederror',
n_estimators=200,
min_child_weight=1,
max_depth=3,
subsample=0.7,
colsample_bytree=0.5,
learning_rate=0.1)
eval_set = [(X_train, y_train), (X_test, y_test)]
XG.fit(X_train,
y_train,
eval_metric="rmse",
early_stopping_rounds=early_stopping_rounds,
eval_set=eval_set,
verbose=False)
# Make predictions and evaluate
preds_train = XG.predict(X_train)
preds_test = XG.predict(X_test)
rms_train = (mean_squared_error(y_train, preds_train))**0.5
rms_test = (mean_squared_error(y_test, preds_test))**0.5
r2_train = r2_score(y_train, preds_train)
r2_test = r2_score(y_test, preds_test)
mae_train = mean_absolute_error(y_train, preds_train)
mae_test = mean_absolute_error(y_test, preds_test)
results = XG.evals_result()
epochs = len(results['validation_0']['rmse'])
# Plot progress over epochs and final true vs predicted age
if plot:
fig, ax = plt.subplots(1, 3, figsize=(16, 3.5))
ax[0].scatter(y_train, preds_train, alpha=0.5)
ax[0].plot(range(20, 100), range(20, 100), c='red')
ax[0].set_xlabel('True Age')
ax[0].set_ylabel('Predicted Age')
ax[0].grid(True, lw=1.5, ls='--', alpha=0.75)
ax[0].set_title('XGboost on training data')
ax[1].scatter(y_test, preds_test, alpha=0.5)
ax[1].plot(range(20, 100), range(20, 100), c='red')
ax[1].set_xlabel('True Age')
ax[1].set_ylabel('Predicted Age')
ax[1].grid(True, lw=1.5, ls='--', alpha=0.75)
ax[1].set_title('XGboost on testing data')
x_axis = range(0, epochs)
ax[2].plot(x_axis, results['validation_0']['rmse'], label='Train')
ax[2].plot(x_axis, results['validation_1']['rmse'], label='Test')
ax[2].legend()
ax[2].set_ylabel('rms')
ax[2].set_xlabel('epoch')
ax[2].set_title('XGBoost rms')
plt.show()
# print metric
print(f'The number of training epochs was {epochs}')
print(f'The rms on the training data is {rms_train:.3f} years')
print(f'The rms on the testing data is {rms_test:.3f} years')
print(f'The r^2 on the training data is {r2_train:.3f}')
print(f'The r^2 on the testing data is {r2_test:.3f}')
print(f'The MAE on the training data is {mae_train:.3f} years')
print(f'The MAE on the testing data is {mae_test:.3f} years')
return XG, rms_train, rms_test, r2_train, r2_test, XG.feature_importances_
def runXGBRegressorTuning(X_train,
X_test,
y_train,
y_test,
scoring='neg_mean_squared_error',
cv=5,
initial_max_depth=[3, 5, 7, 9],
initial_min_child_weight=[1, 3, 5],
objective='reg:linear',
learning_rate=0.1,
n_estimators=140,
max_depth=5,
min_child_weight=1,
reg_alpha=0,
reg_lambda=0,
gamma=0,
subsample=0.8,
colsample_bytree=0.8):
# Tune max depth and min child weight - strongest bearing on model tuning
best_score = 1000000000
xgb_param_dict = dict(learning_rate=learning_rate,
n_estimators=n_estimators,
max_depth=max_depth,
min_child_weight=min_child_weight,
reg_alpha=reg_alpha,
gamma=gamma,
subsample=subsample,
colsample_bytree=colsample_bytree,
objective=objective,
reg_lambda=reg_lambda,
nthread=4,
scale_pos_weight=1,
seed=27)
xgb_model = XGBRegressor(**xgb_param_dict)
param_test1 = {
'max_depth': initial_max_depth,
'min_child_weight': initial_min_child_weight
}
gsearch = GridSearchCV(estimator=XGBRegressor(**xgb_param_dict),
param_grid=param_test1,
scoring=scoring,
n_jobs=4,
iid=False,
cv=cv)
gsearch.fit(X_train, y_train)
print('Best params: {}'.format(gsearch.best_params_))
print('Best score: {}'.format(np.sqrt(-gsearch.best_score_)))
best_score = np.sqrt(-gsearch.best_score_)
xgb_param_dict['max_depth'] = gsearch.best_params_['max_depth']
xgb_param_dict['min_child_depth'] = gsearch.best_params_['min_child_depth']
xgb_model = XGBRegressor(**xgb_param_dict)
# Decision tree to determine new search ranges if optimal solution found at limit of initial range
if gsearch.best_params_['max_depth'] == max(initial_max_depth):
print('Best max_depth at max limit of initial range...')
new_initial_max_depth = range(max(initial_max_depth),
max(initial_max_depth) + 6, 2)
elif gsearch.best_params_['max_depth'] == min(initial_max_depth):
print('Best max_depth at min limit of initial range...')
new_initial_max_depth = range(
min(initial_max_depth) - 6, min(initial_max_depth), 2)
else:
new_initial_max_depth = initial_max_depth
if gsearch.best_params_['min_child_weight'] == max(
initial_min_child_weight):
print('Best min_child_weight at max limit of initial range...')
new_initial_min_child_weight = range(max(initial_min_child_weight),
max(initial_min_child_weight) + 6,
2)
elif gsearch.best_params_['min_child_weight'] == min(
initial_min_child_weight):
print('Best max_depth at min limit of initial range...')
new_initial_min_child_weight = range(
min(initial_min_child_weight) - 6, min(initial_min_child_weight),
2)
else:
new_initial_min_child_weight = initial_min_child_weight
# Run various procedures depending on outcome
if new_initial_max_depth != initial_min_child_weight or new_initial_max_depth != initial_max_depth:
param_test = {
'max_depth': new_initial_max_depth,
'min_child_weight': new_initial_min_child_weight
}
gsearch = GridSearchCV(estimator=xgb_model,
param_grid=param_test,
scoring=scoring,
n_jobs=4,
iid=False,
cv=cv)
gsearch.fit(X_train, y_train)
print('Best params: {}'.format(gsearch.best_params_))
print('Best score: {}'.format(np.sqrt(-gsearch.best_score_)))
best_score = np.sqrt(-gsearch.best_score_)
xgb_param_dict['max_depth'] = gsearch.best_params_['max_depth']
xgb_param_dict['min_child_depth'] = gsearch.best_params_[
'min_child_depth']
xgb_model = XGBRegressor(**xgb_param_dict)
else:
# Check either side of best variables to check
param_test = {
'max_depth': [
xgb_param_dict['max_depth'] - 1, xgb_param_dict['max_depth'],
xgb_param_dict['max_depth'] + 1
],
'min_child_weight': [
xgb_param_dict['min_child_weight'] - 1,
xgb_param_dict['min_child_weight'],
xgb_param_dict['min_child_weight'] + 1
]
}
gsearch = GridSearchCV(estimator=xgb_model,
param_grid=param_test,
scoring=scoring,
n_jobs=4,
iid=False,
cv=cv)
gsearch.fit(X_train, y_train)
# Fine-tuned max_depth and min_child_weight parameters
print('Fine-tuned max_depth and min_child_weight parameters...\n')
print('Best params: {}'.format(gsearch.best_params_))
print('Best score: {}'.format(np.sqrt(-gsearch.best_score_)))
best_score = np.sqrt(-gsearch.best_score_)
xgb_param_dict['max_depth'] = gsearch.best_params_['max_depth']
xgb_param_dict['min_child_weight'] = gsearch.best_params_[
'min_child_weight']
xgb_model = XGBRegressor(**xgb_param_dict)
warnings = {}
# Tune gamma
param_test3 = {'gamma': [i / 10.0 for i in range(0, 5)]}
gsearch = GridSearchCV(estimator=xgb_model,
param_grid=param_test3,
scoring=scoring,
n_jobs=4,
iid=False,
cv=cv)
gsearch.fit(X_train, y_train)
# Fine-tuned gamma parameters
print('Fine-tuned gamma parameters...\n')
print('Best params: {}'.format(gsearch.best_params_))
print('Best score: {}'.format(np.sqrt(-gsearch.best_score_)))
best_score = np.sqrt(-gsearch.best_score_)
xgb_param_dict['gamma'] = gsearch.best_params_['gamma']
xgb_model = XGBRegressor(**xgb_param_dict)
if xgb_param_dict['gamma'] == max(param_test3['gamma']):
warnings[
'gamma'] = 'gamma: Optimal parameter {} at max of search range'.format(
xgb_param_dict['gamma'])
# Tune subsample and colsample_bytree
param_test4 = {
'subsample': [i / 10.0 for i in range(6, 10)],
'colsample_bytree': [i / 10.0 for i in range(6, 10)]
}
gsearch = GridSearchCV(estimator=xgb_model,
param_grid=param_test4,
scoring=scoring,
n_jobs=4,
iid=False,
cv=cv)
gsearch.fit(X_train, y_train)
# Fine-tuned subsample and colsample_bytree parameters
print('Tuned subsample and colsample_bytree parameters...\n')
print('Best params: {}'.format(gsearch.best_params_))
print('Best score: {}'.format(np.sqrt(-gsearch.best_score_)))
best_score = np.sqrt(-gsearch.best_score_)
xgb_param_dict['subsample'] = gsearch.best_params_['subsample']
xgb_param_dict['colsample_bytree'] = gsearch.best_params_[
'colsample_bytree']
xgb_model = XGBRegressor(**xgb_param_dict)
# while xgb_param_dict['subsample'] == max(param_test4['subsample'] or
# xgb_param_dict['colsample_bytree'] == max(param_test4['colsample_bytree']) or
# xgb_param_dict['subsample'] == min(param_test4['subsample'] or
# xgb_param_dict['colsample_bytree'] == min(param_test4['colsample_bytree']):
if xgb_param_dict['subsample'] == max(param_test4['subsample']):
warnings[
'subsample'] = 'subsample: Optimal parameter {} at max of search range'.format(
xgb_param_dict['subsample'])
elif xgb_param_dict['subsample'] == min(param_test4['subsample']):
warnings[
'subsample'] = 'subsample: Optimal parameter {} at min of search range'.format(
xgb_param_dict['subsample'])
if xgb_param_dict['colsample_bytree'] == max(
param_test4['colsample_bytree']):
warnings[
'colsample_bytree'] = 'colsample_bytree: Optimal parameter {} at max of search range'.format(
xgb_param_dict['colsample_bytree'])
elif xgb_param_dict['colsample_bytreee'] == min(
param_test4['colsample_bytree']):
warnings[
'colsample_bytree'] = 'colsample_bytree: Optimal parameter {} at min of search range'.format(
xgb_param_dict['colsample_bytree'])
# Tune regularisation parameters
param_test6 = {'reg_alpha': [1e-5, 1e-2, 0.1, 1, 100]}
gsearch = GridSearchCV(estimator=xgb_model,
param_grid=param_test6,
scoring=scoring,
n_jobs=4,
iid=False,
cv=cv)
gsearch.fit(X_train, y_train)
# Fine-tuned regularisation parameters
print('Tuned regularisation parameters...\n')
print('Best params: {}'.format(gsearch.best_params_))
print('Best score: {}'.format(np.sqrt(-gsearch.best_score_)))
best_score = np.sqrt(-gsearch.best_score_)
xgb_param_dict['reg_alpha'] = gsearch.best_params_['reg_alpha']
xgb_model = XGBRegressor(**xgb_param_dict)
# Fine-tune regularisation parameters
param_test7 = {
'reg_alpha': [
float(xgb_param_dict['reg_alpha']) / 10,
float(xgb_param_dict['reg_alpha']) / 2,
float(xgb_param_dict['reg_alpha']),
float(xgb_param_dict['reg_alpha']) * 5,
float(xgb_param_dict['reg_alpha']) * 2
]
}
gsearch = GridSearchCV(estimator=xgb_model,
param_grid=param_test6,
scoring=scoring,
n_jobs=4,
iid=False,
cv=cv)
gsearch.fit(X_train, y_train)
# Fine-tuned regularisation parameters
print('Tuned regularisation parameters...\n')
print('Best params: {}'.format(gsearch.best_params_))
print('Best score: {}'.format(np.sqrt(-gsearch.best_score_)))
best_score = np.sqrt(-gsearch.best_score)
xgb_param_dict['reg_alpha'] = gsearch.best_params_['reg_alpha']
xgb_model = XGBRegressor(**xgb_param_dict)
# Tune the learning rate of the model
cvresult = xgb.cv(xgb_model.get_params(),
X_train,
num_boost_round=xgb_model.get_params()['n_estimators'],
nfold=cv,
metrics='rmse',
early_stopping_rounds=50,
show_progress=False)
# Set the model to the optimal number of estimators wrt early stopping round limit
xgb_param_dict['n_estimators'] = cvresult.shape[0]
# Learn final XGBoost model
xgb_model = XGBRegressor(**xgb_param_dict)
xgb_model.fit(X_train,
y_train,
eval_set=[(X_train, y_train), (X_test, y_test)],
eval_metric='rmse',
verbose=True)
return xgb_model, xgb_model.get_params(), xgb_model.evals_result(
), warnings
xg_model = XGBRegressor(n_estimators=500,
learning_rate=0.075,
max_depth=7,
min_child_weight=5,
eval_metric='rmse',
seed=1337,
objective='reg:squarederror')
xg_model.fit(X_train,
y_train,
early_stopping_rounds=10,
eval_set=[(X_test, y_test)],
verbose=False)
predictions = xg_model.predict(X_test)
max_estimators = len(xg_model.evals_result()['validation_0']['rmse'])
print(max_estimators)
max_estim_rmse = pd.DataFrame(xg_model.evals_result()['validation_0']['rmse'],
columns=['rmse'])
plt.plot(max_estim_rmse)
plt.ylabel("RMSE")
plt.xlabel("Max Estimators")
xgb.plot_importance(xg_model)
plt.show()
# In[21]:
rmse_rf = sqrt(mean_squared_error(predictions, y_test))
print("RMSE:", round(rmse_rf, 2))
# In[22]:
class VanillaModelRegression(Model):
def __init__(self, configuration):
self._configuration = configuration
self._objects = {}
self._annotation = 'Performance comparision of different MVA discriminants'
if 'annotation' in self._configuration:
self._annotation = self._configuration['annotation']
self.my_model = None
self.fit_results = None
self.Initialize()
@log_with()
def Initialize(self):
self.build_best_prediction()
pass
@log_with()
def get(self, name):
"""
Factory method
"""
if name in self._objects:
return self._objects[name]
else:
return None #provide factory method implementation here
return self._objects[name]
@log_with()
def get_data_provider(self, provider_name):
"""
Factory method for data providers
"""
from dataprovider import PandasDataProviderFromCSV_original
if provider_name in self._objects:
return self._objects[provider_name]
else:
if '.csv' in self._configuration[provider_name]['input_file']:
provider = PandasDataProviderFromCSV_original(
self._configuration[provider_name]['input_file'])
self._objects[provider_name] = provider
else:
raise NotImplementedError
return self._objects[provider_name]
@log_with()
def build_best_prediction(self):
print("Dummy building vanilla model!")
from matplotlib import pyplot
from xgboost import XGBRegressor, plot_importance
# from sklearn.metrics import explained_variance_score, max_error, mean_absolute_error, mean_squared_error
from sklearn.metrics import explained_variance_score, mean_absolute_error, mean_squared_error
target_variable_names = self._configuration['model']['target'][0]
data_provider = self.get_data_provider(
self._configuration['model']['data_provider'])
input_features_names = self._configuration['model']['input_features']
X_train = data_provider.train[input_features_names]
y_train = data_provider.train[target_variable_names]
X_test = data_provider.test[input_features_names]
y_test = data_provider.test[target_variable_names]
# print X_train.dtypes
# print X_train.head()
# print X_test.dtypes
# print X_test.head()
# print y_train.dtypes
# print y_train.head()
# print y_test.dtypes
# print y_test.head()
eval_set = [(X_train, y_train), (X_test, y_test)]
self.my_model = XGBRegressor(
n_estimators=self._configuration['model']['n_estimators'],
max_depth=self._configuration['model']['max_depth'],
learning_rate=self._configuration['model']['learning_rate'],
verbosity=0)
self.my_model.fit(X_train,
y_train,
eval_metric=["rmse", "mae"],
eval_set=eval_set,
verbose=False)
y_pred = my_model.predict(X_test)
# print "Max error: ", max_error(y_test,y_pred)
print("Explained variance score: ",
explained_variance_score(y_test, y_pred))
print("Mean absolute error: ", mean_absolute_error(y_test, y_pred))
print("Mean squared error: ", mean_squared_error(y_test, y_pred))
self.fit_results = self.my_model.evals_result()
# print 'YO importance'
# plot_importance(my_model)
pickle.dump(
self.my_model,
open(self._configuration['model']['output_filename'], 'wb'))
pass
def xgb_train_and_predict(column_to_predict, train_data, evaluation_data,
data_path):
"""
train a xgboost model on column_to_predict from train_data
and generates predictions for evaluation_data which are stored in a column named `output`
data_path specify path to data in order to compute external features
"""
logger.info("----------- check training data -------------")
for resolution, dtf in train_data.groupby(['cantine_nom', 'cantine_type']):
logger.info(
"canteen %s has %s days of history to train on starting on %s and ending on %s",
resolution,
len(dtf),
dtf["date_str"].min(),
dtf['date_str'].max(),
)
features = [
"site_id",
# "date_str",
# "cantine_nom",
# "site_type_cat",
"secteur_cat",
# "year",
# "month",
# "day",
"week",
"wednesday", # this feature is only used if the dedicated parameter include_wednesday is set to True
# "weekday", # weekday is not used here because redundant with meal composition
"holidays_in",
"non_working_in",
"effectif",
"frequentation_prevue",
"Events.RAMADAN_ago", # "Events.AID_ago"
]
with open(os.path.join(data_path, "calculators/menus.json")) as f_in:
dict_special_dishes = json.load(f_in)
features = features + list(dict_special_dishes.keys())
# prepare training dataset
train_data_reduced = train_data[features + [column_to_predict]]
before_dropping_na = len(train_data_reduced)
train_data_reduced.dropna(inplace=True)
after_dropping_na = len(train_data_reduced)
percent_dropped = round(100 * (before_dropping_na - after_dropping_na) /
before_dropping_na)
logger.info("Dropping %s percent of training data due to NANs",
percent_dropped)
train_data_x = train_data_reduced[features]
train_data_y = train_data_reduced[column_to_predict]
if len(train_data_x) == 0:
raise EmptyTrainingSet("")
# prepare test_dataset to control overfitting
train_data_x, train_data_y, test_data_x, test_data_y = ratio_split(
train_data_x, train_data_y, 0.1)
eval_set = [(train_data_x, train_data_y), (test_data_x, test_data_y)]
# prepare prediction dataset
evaluation_data_x = evaluation_data[features]
params = {
'base_score': train_data_y.mean(),
"objective": 'reg:squarederror',
"n_estimators": 5000,
"learning_rate": 0.09,
"max_depth": 5,
"booster": 'gbtree',
"colsample_bylevel": 1,
"colsample_bynode": 1,
"colsample_bytree": 1,
"gamma": 0,
"importance_type": 'gain',
"max_delta_step": 0,
"min_child_weight": 1,
"missing": None,
"n_jobs": mp.cpu_count(),
"nthread": None,
"random_state": 0,
"reg_alpha": 0,
"reg_lambda": 1,
"scale_pos_weight": 1,
"seed": None,
"subsample": 1,
"verbosity": 0,
}
# define model
model = XGBRegressor(**params)
# train model
model.fit(train_data_x,
train_data_y,
early_stopping_rounds=100,
eval_set=eval_set,
eval_metric=multi_custom_metrics,
verbose=False)
# predict values
evaluation_data['output'] = np.ceil(model.predict(evaluation_data_x))
logger.info("----------- check predictions -------------")
for resolution, dtf in evaluation_data.groupby(
['cantine_nom', 'cantine_type']):
logger.info(
"canteen %s has predictions for %s days starting on %s and ending on %s",
resolution,
len(dtf),
dtf["date_str"].min(),
dtf['date_str'].max(),
)
logger.info("----------- evaluate model -------------")
feature_importance_list = evaluate_feature_importance(
evaluation_data_x, model)
plot_curve(model.evals_result(), "nantes_metropole_xgb")
return evaluation_data, feature_importance_list
from sklearn.metrics import r2_score
boston = load_boston()
x = boston.data
y = boston.target
x_train, x_test, y_train, y_test = tts(x, y, train_size=0.8, random_state=66)
xgb = XGBRegressor(n_estimators=10, learning_rate=0.1)
xgb.fit(x_train,
y_train,
verbose=True,
eval_metric=["rmse", "logloss"],
eval_set=[(x_train, y_train), (x_test, y_test)],
early_stopping_rounds=20)
#rmse,mae,logloss,error,auc
y_pre = xgb.predict(x_test)
r2 = r2_score(y_test, y_pre)
score = xgb.score(x_test, y_test)
result = xgb.evals_result()
print(__file__)
print(result)
print("r2")
print(r2)
print("score")
print(score)
# # train the model
# print("[INFO] training model...")
# model.fit(Xtrain, Ytrain, validation_data=(Xvalid, Yvalid),
# epochs=10, batch_size=20)
#dtrain=xgb.DMatrix(Xtrain,label=Ytrain)
#dvalid=xgb.DMatrix(Xvalid,label=Yvalid)
kf = KFold(n_splits=10, shuffle=True, random_state=seed)
vali = cross_val_score(bst, Xvalid, Yvalid, cv=kf, verbose=1, n_jobs=-1)
#print(bst.get_params())
print("####################Xgboost")
trainbst = bst.fit(Xtrain,
Ytrain,
eval_set=[(Xtrain, Ytrain), (Xvalid, Yvalid)],
eval_metric=['rmse', 'mae'],
verbose=True)
evres = bst.evals_result() # See MAE metric
print(vali.mean())
plt.plot(list(evres['validation_0']['rmse']))
plt.plot(list(evres['validation_1']['rmse']))
plt.title('Model rmse')
plt.ylabel('rmse')
plt.xlabel('Epoch')
plt.legend(['Train', 'Test'], loc='upper left')
#plt.savefig("Keras_NN_Accuracy.png")
plt.show()
plt.clf()
plt.plot(list(evres['validation_0']['mae']))
plt.plot(list(evres['validation_1']['mae']))
plt.title('Model mae')
def xgb_interval_train_and_predict(column_to_predict, train_data, evaluation_data, confidence_interval, data_path):
"""
train a xgboost model on column_to_predict from train_data
and generates predictions for evaluation_data which are stored in a column named `output`
data_path specify path to data in order to compute external features
Note: here, the model does not directly learn from column to_predict but from the bound of a confidence_interval
see here for more details: https://towardsdatascience.com/confidence-intervals-for-xgboost-cac2955a8fde
"""
features = [
"site_id",
"secteur_cat",
"week",
"wednesday", # this feature is only used if the dedicated parameter include_wednesday is set to True
"non_working_in",
"holidays_in",
"effectif",
"frequentation_prevue",
"Events.RAMADAN_ago", # "Events.AID_ago"
]
logger.info("----------- check training data -------------")
for resolution, dtf in train_data.groupby(['cantine_nom', 'cantine_type']):
logger.info("canteen %s has %s days of history to train on starting on %s and ending on %s",
resolution,
len(dtf),
dtf["date_str"].min(),
dtf['date_str'].max(),
)
with open(os.path.join(data_path, "calculators/menus.json")) as f_in:
dict_special_dishes = json.load(f_in)
features = features + list(dict_special_dishes.keys())
# prepare training dataset
train_data_reduced = train_data[features + [column_to_predict]]
before_dropping_na = len(train_data_reduced)
train_data_reduced.dropna(inplace=True)
after_dropping_na = len(train_data_reduced)
percent_dropped = round(100 * (before_dropping_na - after_dropping_na) / before_dropping_na)
logger.info("Dropping %s percent of training data due to NANs", percent_dropped)
train_data_y = train_data_reduced[column_to_predict]
train_data_x = train_data_reduced[features]
if len(train_data_x) == 0:
raise EmptyTrainingSet("")
# prepare test_dataset to control overfitting
train_data_x, train_data_y, test_data_x, test_data_y = ratio_split(train_data_x, train_data_y, 0.1)
eval_set = [(train_data_x, train_data_y), (test_data_x, test_data_y)]
# prepare prediction dataset
evaluation_data_x = evaluation_data[features]
params = {
"n_jobs": mp.cpu_count(),
'base_score': train_data_y.mean(),
"objective": 'reg:squarederror',
"n_estimators": 5000,
"learning_rate": 0.09,
"max_depth": 5,
"booster": 'gbtree',
"importance_type": 'gain',
"max_delta_step": 0,
"min_child_weight": 1,
"random_state": 0,
"reg_alpha": 0,
"reg_lambda": 1,
"scale_pos_weight": 1,
"subsample": 1,
"verbosity": 0,
}
confidence_step = (1 - confidence_interval) / 2
# under predict
params.update({"objective": log_cosh_quantile(1 - confidence_step)})
confidence_upper_bound_model = XGBRegressor(**params)
confidence_upper_bound_model.fit(
train_data_x,
train_data_y,
early_stopping_rounds=100,
eval_set=eval_set,
eval_metric=multi_custom_metrics,
verbose=False)
y_upper_smooth = np.ceil(confidence_upper_bound_model.predict(evaluation_data_x))
# over predict
params.update({"objective": log_cosh_quantile(confidence_step)})
confidence_lower_bound_model = XGBRegressor(**params)
confidence_lower_bound_model.fit(train_data_x, train_data_y, verbose=False)
y_lower_smooth = np.ceil(confidence_lower_bound_model.predict(evaluation_data_x))
evaluation_data['pred_lower_bound'] = y_lower_smooth
evaluation_data['pred_upper_bound'] = y_upper_smooth
evaluation_data['output'] = np.maximum.reduce([y_upper_smooth, y_lower_smooth])
logger.info("----------- check predictions -------------")
for resolution, dtf in evaluation_data.groupby(['cantine_nom', 'cantine_type']):
logger.info("canteen %s has predictions for %s days starting on %s and ending on %s",
resolution,
len(dtf),
dtf["date_str"].min(),
dtf['date_str'].max(),
)
logger.info("----------- evaluate model -------------")
feature_importance_list = evaluate_feature_importance(evaluation_data_x, confidence_upper_bound_model)
## Generates errors on Windows with Reticulate
plot_curve(confidence_upper_bound_model.evals_result(), "nantes_metropole_xgb")
return evaluation_data, feature_importance_list
x, y = load_boston(return_X_y=True)
x_train, x_test, y_train, y_test = train_test_split(x, y, train_size=0.8, shuffle=True, random_state=66)
model = XGBRegressor(n_estimators=100, learning_rate=0.1) # 나무의 갯수(n_estimators)는 epoch
model.fit(x_train, y_train, verbose=True, eval_metric=["logloss", "rmse"], eval_set =[(x_train, y_train), (x_test, y_test)], early_stopping_rounds=100)
# eval_set은 validation_0이 x_train, y_train// validation1이 x_test, y_test
# {'validation_0': {'rmse': [21.584942, 19.552324, 17.718475]} , 'validation_1': {'rmse': [21.684599, 19.621567, 17.763321]}}
# train test val val지표가 중요
# rmse, mae, logloss, error(설명 error가 accuracy), auc(설명 accuracy친구)
results = model.evals_result() # XGB 에서 사용
print("eval's results : ", results)
y_pred = model.predict(x_test)
r2 = r2_score(y_pred, y_test)
# print("r2 Score : %.2f%%:" %(r2*100.0))
print("r2 : ", r2)
import matplotlib.pyplot as plt
epochs = len(results['validation_0']['logloss']) # epoch의 길이
x_axis = range(0, epochs)
fig, ax = plt.subplots()
ax.plot(x_axis, results['validation_0']['logloss'], label='Train')
return (X_train, y_train), (X_test, y_test)
# Get training and test data
target_colnames = ['Open_x', 'High_x', 'Low_x', 'Close_x']
Path('./Feature_Engineering').mkdir(parents=True, exist_ok=True)
for colname in target_colnames:
(X_train, y_train), (X_test, y_test) = get_feature_importance_data(data, column=colname, include_targets=False)
regressor = XGBRegressor(gamma=0.0, n_estimators=200, learning_rate=0.05)
xgbModel = regressor.fit(X_train, y_train,
eval_set=[(X_train, y_train), (X_test, y_test)], verbose=False)
eval_result = regressor.evals_result()
training_rounds = range(len(eval_result['validation_0']['rmse']))
#########################
# Train Validation Plot #
#########################
# plt.scatter(x=training_rounds, y=eval_result['validation_0']['rmse'], label='Training Error')
# plt.scatter(x=training_rounds, y=eval_result['validation_1']['rmse'], label='Validation Error')
# plt.xlabel('Iterations')
# plt.ylabel('RMSE')
# plt.title('Training Vs. Validation Error')
# plt.legend()
# plt.savefig(f'./Feature_Engineering/{colname}_train_val_history.png')