#预测函数 def get_predict(datas=datasets_yc,model=model,features=['Discount_rate','Distance'],outfiles='D:/a.python/a.python算法/1期末/数据挖掘实战案例_O2O优惠劵使用预测/temp/result01.csv'): data_yc = datas[features] pre_yc = model.predict_proba(data_yc)[:,1] result = datas[['User_id','Coupon_id','Date_received']] result['probability'] = pre_yc #保存为提交所用的csv文档 result.to_csv(outfiles,index=None,header=None)

时间: 2024-02-19 12:00:49 浏览: 21
这是一个使用指定模型对指定数据集进行预测的函数,其中: - 参数 `datas` 是一个DataFrame,包含待预测的数据; - 参数 `model` 是一个已训练好的模型,可以对数据进行预测; - 参数 `features` 是一个列表,表示在预测时需要使用的特征(即数据集中的列); - 参数 `outfiles` 是一个字符串,表示预测结果要保存到的文件路径; - 函数中使用 `model.predict_proba()` 方法对数据进行预测,并返回预测结果的概率值; - 将预测结果与原数据集中的用户ID、优惠券ID和领取日期合并为一个新的DataFrame,并将预测结果保存为CSV文件。
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def get_predict(datas=datasets_yc,model=model,features=['Discount_rate','Distance'],outfiles='result01.csv'): data_yc = datas[features] pre_yc = model.predict_proba(data_yc)[:,1] result = datas[['User_id','Coupon_id','Date_received']] result['probability'] = pre_yc

这段代码的作用是使用训练好的 `model` 对数据集 `datasets_yc` 进行预测,并将预测结果保存到 `result01.csv` 文件中。 这里可以对代码进行优化,使用 `iloc` 函数对 DataFrame 进行切片可以提高代码的执行效率: ```python def get_predict(datas=datasets_yc, model=model, features=['Discount_rate', 'Distance'], outfiles='result01.csv'): data_yc = datas.iloc[:, [datasets_yc.columns.get_loc(c) for c in features]] # 使用 iloc 函数对 DataFrame 进行切片 pre_yc = model.predict_proba(data_yc)[:, 1] result = datas[['User_id', 'Coupon_id', 'Date_received']] result['probability'] = pre_yc result.to_csv(outfiles, index=False) ``` 这里使用了 `iloc` 函数对 DataFrame 进行切片,可以避免使用列名进行切片时需要进行列名查找的开销。同时,通过使用列表推导式和 `get_loc` 函数可以获取到所需要的列的下标。相比原来的代码,这段代码的执行效率更高。

train_predict = model.predict(X_train) test_predict = model.predict(X_test)

这段代码是什么意思? 这段代码是使用机器学习模型进行预测。其中,X_train是训练集数据,X_test是测试集数据。通过调用model.predict()方法,对训练集和测试集进行预测,并将预测结果分别保存在train_predict和test_predict中。在实际应用中,我们通常会将预测结果与真实值进行对比,以评估模型的性能和准确度。

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请检查这段代码有没有错误 import pandas as pd from pyecharts.charts import * from sklearn.linear_model import LogisticRegression data = pd.read_csv('双色球.csv',encoding='utf-8', engine='python') data.head() for i in range(0,6): data[f'r{i+1}'] = data['红球'].apply(lambda x:x.split(',')[i]) data[f'r{i+1}'] = data[f'r{i+1}'].astype('int64') def get_lotto_data(data, lotto, lotto_id): #取数据,指定训练集和测试集 data['lotto_id'] = lotto_id X = [] Y = [] # 标签and值 for s, p in zip(data['lotto_id'], data[lotto]): X.append([float(s)]) Y.append(float(p)) return X, Y def linear_model_test(X, Y, predict_value): #建立线性回归模型 regr = LogisticRegression() regr.fit(X, Y) predict_outcome = regr.predict(predict_value) predictions = {} predictions['intercept'] = regr.intercept_ predictions['coefficient'] = regr.coef_ predictions['predicted_value'] = predict_outcome return predictions def get_predicted_num(file, lotto, lotto_id): #使用线性回归推测中奖号码 X, Y = get_lotto_data(file, lotto, lotto_id) predict_value = [[33]] result = linear_model_test(X, Y, predict_value) if lotto_id < 7: print(f'中奖第{lotto_id}个红球为:', result['predicted_value'].astype('int64'), '号球') else: print('中奖蓝球为:', result['predicted_value'].astype('int64'), '号球') get_predicted_num(data, 'r1', 1) # 预测红1 get_predicted_num(data, 'r2', 2) # 预测红2 get_predicted_num(data, 'r3', 3) # 预测红3 get_predicted_num(data, 'r4', 4) # 预测红4 get_predicted_num(data, 'r5', 5) # 预测红5 get_predicted_num(data, 'r6', 6) # 预测红6 get_predicted_num(data, '蓝球', 7) # 预测蓝7

介绍一下以下代码的逻辑 # data file path train_raw_path='./data/tianchi_fresh_comp_train_user.csv' train_file_path = './data/preprocessed_train_user.csv' item_file_path='./data/tianchi_fresh_comp_train_item.csv' #offline_train_file_path = './data/ccf_data_revised/ccf_offline_stage1_train.csv' #offline_test_file_path = './data/ccf_data_revised/ccf_offline_stage1_test_revised.csv' # split data path #active_user_offline_data_path = './data/data_split/active_user_offline_record.csv' #active_user_online_data_path = './data/data_split/active_user_online_record.csv' #offline_user_data_path = './data/data_split/offline_user_record.csv' #online_user_data_path = './data/data_split/online_user_record.csv' train_path = './data/data_split/train_data/' train_feature_data_path = train_path + 'features/' train_raw_data_path = train_path + 'raw_data.csv' #train_cleanedraw_data_path=train_path+'cleanedraw_data.csv' train_subraw_data_path=train_path+'subraw_data.csv' train_dataset_path = train_path + 'dataset.csv' train_subdataset_path=train_path+'subdataset.csv' train_raw_online_data_path = train_path + 'raw_online_data.csv' validate_path = './data/data_split/validate_data/' validate_feature_data_path = validate_path + 'features/' validate_raw_data_path = validate_path + 'raw_data.csv' #validate_cleaneraw_data_path=validate_path+'cleanedraw_data.csv' validate_dataset_path = validate_path + 'dataset.csv' validate_raw_online_data_path = validate_path + 'raw_online_data.csv' predict_path = './data/data_split/predict_data/' predict_feature_data_path = predict_path + 'features/' predict_raw_data_path = predict_path + 'raw_data.csv' predict_dataset_path = predict_path + 'dataset.csv' predict_raw_online_data_path = predict_path + 'raw_online_data.csv' # model path model_path = './data/model/model' model_file = '/model' model_dump_file = '/model_dump.txt' model_fmap_file = '/model.fmap' model_feature_importance_file = '/feature_importance.png' model_feature_importance_csv = '/feature_importance.csv' model_train_log = '/train.log' model_params = '/param.json' val_diff_file = '/val_diff.csv' # submission path submission_path = './data/submission/submission' submission_hist_file = '/hist.png' submission_file = '/tianchi_mobile_recommendation_predict.csv' # raw field name user_label = 'user_id' item_label = 'item_id' action_label = 'behavior_type' user_geohash_label='user_geohash' category_label='item_category' action_time_label='time' probability_consumed_label = 'Probability' # global values consume_time_limit = 15 train_feature_start_time = '20141119' train_feature_end_time = '20141217' train_dataset_time = '20141218' #train_dataset_end_time = '20141218' validate_feature_start_time = '20141118' validate_feature_end_time = '20141216' validate_dataset_time = '20141217' #validate_dataset_end_time = '20160514' predict_feature_start_time = '20141120' predict_feature_end_time = '20141218' predict_dataset_time = '20141219' #predict_dataset_end_time = '20160731'

在以下这段代码后面继续添加输出测试集、训练集AUC、f1_score、准确率的代码:# 定义模型参数 input_dim = X_train.shape[1] epochs = 100 batch_size = 32 learning_rate = 0.1 dropout_rate = 0.5 # 定义模型结构 def create_model(): model = Sequential() model.add(Dense(128, input_dim=input_dim, activation='relu')) model.add(Dropout(dropout_rate)) model.add(Dense(32, activation='relu')) model.add(Dropout(dropout_rate)) model.add(Dense(1, activation='sigmoid')) optimizer = Adam(learning_rate=learning_rate) model.compile(loss='binary_crossentropy', optimizer=optimizer, metrics=['accuracy']) return model # 5折交叉验证 kf = KFold(n_splits=5, shuffle=True, random_state=42) cv_scores = [] for train_index, test_index in kf.split(X_train): # 划分训练集和验证集 X_train_fold, X_val_fold = X_train.iloc[train_index], X_train.iloc[test_index] y_train_fold, y_val_fold = y_train_forced_turnover_nolimited.iloc[train_index], y_train_forced_turnover_nolimited.iloc[test_index] # 创建模型 model = create_model() # 定义早停策略 early_stopping = EarlyStopping(monitor='val_loss', patience=10, verbose=1) # 训练模型 model.fit(X_train_fold, y_train_fold, validation_data=(X_val_fold, y_val_fold), epochs=epochs, batch_size=batch_size, callbacks=[early_stopping], verbose=1) # 预测验证集 y_pred = model.predict(X_val_fold) # 计算AUC指标 auc = roc_auc_score(y_val_fold, y_pred) cv_scores.append(auc) # 输出交叉验证结果 print('CV AUC:', np.mean(cv_scores)) # 在全量数据上重新训练模型 model = create_model() model.fit(X_train, y_train_forced_turnover_nolimited, epochs=epochs, batch_size=batch_size, verbose=1)

修改代码,使得输出结果是可重复的:# 定义模型参数 input_dim = X_train.shape[1] epochs = 100 batch_size = 32 learning_rate = 0.01 dropout_rate = 0.7 # 定义模型结构 def create_model(): model = Sequential() model.add(Dense(64, input_dim=input_dim, activation='relu')) model.add(Dropout(dropout_rate)) model.add(Dense(32, activation='relu')) model.add(Dropout(dropout_rate)) model.add(Dense(1, activation='sigmoid')) optimizer = Adam(learning_rate=learning_rate) model.compile(loss='binary_crossentropy', optimizer=optimizer, metrics=['accuracy']) return model # 5折交叉验证 kf = KFold(n_splits=5, shuffle=True, random_state=42) cv_scores = [] for train_index, test_index in kf.split(X_train): # 划分训练集和验证集 X_train_fold, X_val_fold = X_train.iloc[train_index], X_train.iloc[test_index] y_train_fold, y_val_fold = y_train_forced_turnover_nolimited.iloc[train_index], y_train_forced_turnover_nolimited.iloc[test_index] # 创建模型 model = create_model() # 定义早停策略 #early_stopping = EarlyStopping(monitor='val_loss', patience=10, verbose=1) # 训练模型 model.fit(X_train_fold, y_train_fold, validation_data=(X_val_fold, y_val_fold), epochs=epochs, batch_size=batch_size,verbose=1) # 预测验证集 y_pred = model.predict(X_val_fold) # 计算AUC指标 auc = roc_auc_score(y_val_fold, y_pred) cv_scores.append(auc) # 输出交叉验证结果 print('CV AUC:', np.mean(cv_scores)) # 在全量数据上重新训练模型 model = create_model() model.fit(X_train, y_train_forced_turnover_nolimited, epochs=epochs, batch_size=batch_size, verbose=1) #测试集结果 test_pred = model.predict(X_test) test_auc = roc_auc_score(y_test_forced_turnover_nolimited, test_pred) test_f1_score = f1_score(y_test_forced_turnover_nolimited, np.round(test_pred)) test_accuracy = accuracy_score(y_test_forced_turnover_nolimited, np.round(test_pred)) print('Test AUC:', test_auc) print('Test F1 Score:', test_f1_score) print('Test Accuracy:', test_accuracy) #训练集结果 train_pred = model.predict(X_train) train_auc = roc_auc_score(y_train_forced_turnover_nolimited, train_pred) train_f1_score = f1_score(y_train_forced_turnover_nolimited, np.round(train_pred)) train_accuracy = accuracy_score(y_train_forced_turnover_nolimited, np.round(train_pred)) print('Train AUC:', train_auc) print('Train F1 Score:', train_f1_score) print('Train Accuracy:', train_accuracy)

将这段代码改为输出的AUC、f1_score、Accuracy是可重复的:# 定义模型参数 input_dim = X_train.shape[1] epochs = 100 batch_size = 32 learning_rate = 0.001 dropout_rate = 0.1 # 定义模型结构 def create_model(): model = Sequential() model.add(Dense(64, input_dim=input_dim, activation='relu')) model.add(Dropout(dropout_rate)) model.add(Dense(32, activation='relu')) model.add(Dropout(dropout_rate)) model.add(Dense(1, activation='sigmoid')) optimizer = Adam(learning_rate=learning_rate) model.compile(loss='binary_crossentropy', optimizer=optimizer, metrics=['accuracy']) return model # 5折交叉验证 kf = KFold(n_splits=5, shuffle=True, random_state=42) cv_scores = [] for train_index, test_index in kf.split(X_train): # 划分训练集和验证集 X_train_fold, X_val_fold = X_train.iloc[train_index], X_train.iloc[test_index] y_train_fold, y_val_fold = y_train_forced_turnover_nolimited.iloc[train_index], y_train_forced_turnover_nolimited.iloc[test_index] # 创建模型 model = create_model() # 定义早停策略 #early_stopping = EarlyStopping(monitor='val_loss', patience=10, verbose=1) # 训练模型 model.fit(X_train_fold, y_train_fold, validation_data=(X_val_fold, y_val_fold), epochs=epochs, batch_size=batch_size,verbose=1) # 预测验证集 y_pred = model.predict(X_val_fold) # 计算AUC指标 auc = roc_auc_score(y_val_fold, y_pred) cv_scores.append(auc) # 输出交叉验证结果 print('CV AUC:', np.mean(cv_scores)) # 在全量数据上重新训练模型 model = create_model() model.fit(X_train, y_train_forced_turnover_nolimited, epochs=epochs, batch_size=batch_size, verbose=1) #测试集结果 test_pred = model.predict(X_test) test_auc = roc_auc_score(y_test_forced_turnover_nolimited, test_pred) test_f1_score = f1_score(y_test_forced_turnover_nolimited, np.round(test_pred)) test_accuracy = accuracy_score(y_test_forced_turnover_nolimited, np.round(test_pred)) print('Test AUC:', test_auc) print('Test F1 Score:', test_f1_score) print('Test Accuracy:', test_accuracy) #训练集结果 train_pred = model.predict(X_train) train_auc = roc_auc_score(y_train_forced_turnover_nolimited, train_pred) train_f1_score = f1_score(y_train_forced_turnover_nolimited, np.round(train_pred)) train_accuracy = accuracy_score(y_train_forced_turnover_nolimited, np.round(train_pred)) print('Train AUC:', train_auc) print('Train F1 Score:', train_f1_score) print('Train Accuracy:', train_accuracy)

修改这段代码,使得输出训练集结果是可重复的:# 定义模型参数 input_dim = X_train.shape[1] epochs = 100 batch_size = 32 learning_rate = 0.001 dropout_rate = 0.1 # 定义模型结构 def create_model(): model = Sequential() model.add(Dense(64, input_dim=input_dim, activation='relu')) model.add(Dropout(dropout_rate)) model.add(Dense(32, activation='relu')) model.add(Dropout(dropout_rate)) model.add(Dense(1, activation='sigmoid')) optimizer = Adam(learning_rate=learning_rate) model.compile(loss='binary_crossentropy', optimizer=optimizer, metrics=['accuracy']) return model # 5折交叉验证 kf = KFold(n_splits=5, shuffle=True, random_state=42) cv_scores = [] for train_index, test_index in kf.split(X_train): # 划分训练集和验证集 X_train_fold, X_val_fold = X_train.iloc[train_index], X_train.iloc[test_index] y_train_fold, y_val_fold = y_train_forced_turnover_nolimited.iloc[train_index], y_train_forced_turnover_nolimited.iloc[test_index] # 创建模型 model = create_model() # 定义早停策略 #early_stopping = EarlyStopping(monitor='val_loss', patience=10, verbose=1) # 训练模型 model.fit(X_train_fold, y_train_fold, validation_data=(X_val_fold, y_val_fold), epochs=epochs, batch_size=batch_size,verbose=1) # 预测验证集 y_pred = model.predict(X_val_fold) # 计算AUC指标 auc = roc_auc_score(y_val_fold, y_pred) cv_scores.append(auc) # 输出交叉验证结果 print('CV AUC:', np.mean(cv_scores)) # 在全量数据上重新训练模型 model = create_model() model.fit(X_train, y_train_forced_turnover_nolimited, epochs=epochs, batch_size=batch_size, verbose=1) #测试集结果 test_pred = model.predict(X_test) test_auc = roc_auc_score(y_test_forced_turnover_nolimited, test_pred) test_f1_score = f1_score(y_test_forced_turnover_nolimited, np.round(test_pred)) test_accuracy = accuracy_score(y_test_forced_turnover_nolimited, np.round(test_pred)) print('Test AUC:', test_auc) print('Test F1 Score:', test_f1_score) print('Test Accuracy:', test_accuracy) #训练集结果 train_pred = model.predict(X_train) train_auc = roc_auc_score(y_train_forced_turnover_nolimited, train_pred) train_f1_score = f1_score(y_train_forced_turnover_nolimited, np.round(train_pred)) train_accuracy = accuracy_score(y_train_forced_turnover_nolimited, np.round(train_pred)) print('Train AUC:', train_auc) print('Train F1 Score:', train_f1_score) print('Train Accuracy:', train_accuracy)

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