模型训练评估中常用的两种方法代码实现
T1、留一法一次性切分训练
T2、K折交叉验证训
print("data split:")
if kfold_flag: #T1、采用K折交叉验证训练
kf = KFold(n_splits=2, shuffle=False) # K折交叉验证
for train_index, test_index in kf.split(X_train):
x_train_, y_train_ = X_train[train_index], y_train[train_index]
x_test_, y_test_ = X_train[test_index], y_train[test_index]
ModelC = ModelC_Train(XGBC_Best, x_train_,y_train_, x_test_,y_test_)
else: #T2、采用K折交叉训练
# train_test_split
x_train_, x_test_, y_train_, y_test_ = train_test_split(X_train, y_train, test_size=0.3, random_state=33)
ModelC = ModelC_Train(XGBC_Best, x_train_, x_test_, y_train_, y_test_)
