accuracy_lst_rfc = [] precision_lst_rfc = [] recall_lst_rfc = [] f1_lst_rfc = [] auc_lst_rfc = [] rfc_sm = RandomForestClassifier() #rfc_params = {} rfc_params = {'max_features' : ['auto', 'sqrt', 'log2'], 'random_state' : [42], 'class_weight' : ['balanced','balanced_subsample'], 'criterion' : ['gini', 'entropy'], 'bootstrap' : [True,False]} rand_rfc = RandomizedSearchCV(rfc_sm, rfc_params, n_iter=4) for train, val in sss.split(X_train_sm, y_train_sm): pipeline_rfc = imbalanced_make_pipeline(SMOTE(sampling_strategy='minority'), rand_rfc) # SMOTE happens during Cross Validation not before.. model_rfc = pipeline_rfc.fit(X_train_sm, y_train_sm) best_est_rfc = rand_rfc.best_estimator_ prediction_rfc = best_est_rfc.predict(X_train_sm[val]) accuracy_lst_rfc.append(pipeline_rfc.score(X_train_sm[val], y_train_sm[val])) precision_lst_rfc.append(precision_score(y_train_sm[val], prediction_rfc)) recall_lst_rfc.append(recall_score(y_train_sm[val], prediction_rfc)) f1_lst_rfc.append(f1_score(y_train_sm[val], prediction_rfc)) auc_lst_rfc.append(roc_auc_score(y_train_sm[val], prediction_rfc)) print('---' * 45) print('') print("accuracy: {}".format(np.mean(accuracy_lst_rfc))) print("precision: {}".format(np.mean(precision_lst_rfc))) print("recall: {}".format(np.mean(recall_lst_rfc))) print("f1: {}".format(np.mean(f1_lst_rfc))) print('---' * 45)

PG_Curve-master.rar_precision recall_recall_precision_roc_分类 roc

在IT行业中，尤其是在数据分析和机器学习领域，"PG_Curve-master.rar_precision recall_recall_precision_roc_分类 roc"这个标题和描述涉及到的是评估分类模型性能的关键概念。这些概念是理解和优化模型不可或缺的...

SVM.rar_svm python

accuracy = accuracy_score(y_test, y_pred) print(f"Accuracy: {accuracy}") 除了线性核函数，SVM还支持其他核函数，如多项式、RBF（高斯核）和sigmoid，它们可以处理非线性可分的问题。例如，如果我们使用RBF...

def get_metrics(y_test, y_predicted): precision = precision_score(y_test, y_predicted, pos_label=None, average='weighted') recall = recall_score(y_test, y_predicted, pos_label=None, average='weighted') f1 = f1_score(y_test, y_predicted, pos_label=None, average='weighted') accuracy = accuracy_score(y_test, y_predicted) return accuracy, precision, recall, f1

在函数内部，通过调用precision_score、recall_score、f1_score和accuracy_score函数，分别计算了精确率（precision）、召回率（recall）、F1值（f1）和准确率（accuracy）。这些指标都使用了加权平均的方式...

accuracy=accuracy_score(Ytest,y_pred) recall=recall_score(Ytest,y_pred,average='macro') precision=precision_score(Ytest,y_pred,average='macro') f1=f1_score(Ytest,y_pred,average='macro') print(accuracy,recall,precision,f1)

你计算了分类器的准确率（accuracy）、召回率（recall）、精确率（precision）和 F1 分数（f1）。请注意，你使用了 accuracy_score、recall_score、precision_score 和 f1_score 函数来计算这些指标。这些...

写出以下代码每一步的算法描述、实现步骤与结果分析：import pandas as pd from sklearn.model_selection import train_test_split from sklearn.tree import DecisionTreeClassifier from sklearn.ensemble import RandomForestClassifier from sklearn.metrics import accuracy_score, precision_score, recall_score, f1_score df = pd.read_csv("C:/Users/PC/Desktop/train.csv") df = df.drop(["Name", "Ticket", "Cabin"], axis=1) # 删除无用特征 df = pd.get_dummies(df, columns=["Sex", "Embarked"]) # 将分类特征转换成独热编码 df = df.fillna(df.mean()) # 使用平均值填充缺失值 X = df.drop(["Survived"], axis=1) y = df["Survived"] X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42) dtc = DecisionTreeClassifier(random_state=42) dtc.fit(X_train, y_train) y_pred_dtc = dtc.predict(X_test) pruned_dtc = DecisionTreeClassifier(random_state=42, ccp_alpha=0.015) pruned_dtc.fit(X_train, y_train) y_pred_pruned_dtc = pruned_dtc.predict(X_test) rfc = RandomForestClassifier(n_estimators=100, random_state=42) rfc.fit(X_train, y_train) y_pred_rfc = rfc.predict(X_test) metrics = {"Accuracy": accuracy_score, "Precision": precision_score, "Recall": recall_score, "F1-Score": f1_score} results = {} for key in metrics.keys(): results[key] = {"Decision Tree": metrics[key](y_test, y_pred_dtc), "Pruned Decision Tree": metrics[key](y_test, y_pred_pruned_dtc), "Random Forest": metrics[key](y_test, y_pred_rfc)} results_df = pd.DataFrame(results) print(results_df)

7. 计算模型的准确率、精确率、召回率和F1值 8. 构建一个包含所有模型和指标的数据框并打印输出实现步骤： 1. 导入必要的库 2. 读取训练数据集并删除无用特征 3. 将分类特征转换成独热编码并使用平均值填充缺失值...

def SVMTest(): clf_tfidf = joblib.load(modelFile) y_predicted_tfidf = clf_tfidf.predict(X_test_tfidf) accuracy_tfidf, precision_tfidf, recall_tfidf, f1_tfidf = get_metrics(y_test, y_predicted_tfidf) print("accuracy = %.6f, precision = %.6f, recall = %.6f, f1 = %.6f" % ( accuracy_tfidf, precision_tfidf, recall_tfidf, f1_tfidf)) # 评估 print("Precision, Recall, F1-Score and support") print(metrics.classification_report(y_test, y_predicted_tfidf, target_names=categories)) # 混淆矩阵 print("Confusion Matrix...") cm = metrics.confusion_matrix(y_test, y_predicted_tfidf) print(cm)

它加载了一个经过训练的模型（保存在modelFile中），然后对测试数据进行预测，并计算并打印了准确率、精确率、召回率和 F1 值。接下来，它使用分类报告打印了每个类别的精确率、召回率、F1 值和支持数。最后，它打印...

def SVMTest(): clf_tfidf = joblib.load(modelFile) y_predicted_tfidf = clf_tfidf.predict(X_test_tfidf) accuracy_tfidf, precision_tfidf, recall_tfidf, f1_tfidf = get_metrics(y_test, y_predicted_tfidf) print("accuracy = %.6f, precision = %.6f, recall = %.6f, f1 = %.6f" % ( accuracy_tfidf, precision_tfidf, recall_tfidf, f1_tfidf)) # 评估 print("Precision, Recall, F1-Score and support") print(metrics.classification_report(y_test, y_predicted_tfidf, target_names=categories)) # 混淆矩阵 print("Confusion Matrix...") cm = metrics.confusion_matrix(y_test, y_predicted_tfidf) print(cm)

首先，你打印了准确率(accuracy_tfidf)、精确率(precision_tfidf)、召回率(recall_tfidf)和F1值(f1_tfidf)。然后，你使用classification_report函数打印了分类报告，其中包括每个类别的精确率、召回率和F1值。接下来...

for epoch in range(1, num_epochs + 1): train(model, device, train_loader, optimizer, epoch) test_loss, test_acc, pred, target = test(model, device, test_loader) Recall = recall_score(target, pred, average='macro') Precision = precision_score(target, pred, average='macro') F1_score = f1_score(target, pred, average='macro') kappa_score=cohen_kappa_score(target, pred) test_Loss_list.append(test_loss) test_Accuracy_list.append(test_acc) Recall_list.append(Recall) Precision_list.append(Precision) F1_score_list.append(F1_score) kappa_list.append(kappa_score) Loss.append(test_Loss_list) Accuracy.append(test_Accuracy_list) Recall_test.append(Recall_list) Precision_test.append(Precision_list) F1_score_test.append(F1_score_list) kappa_test.append(kappa_list)

这段代码是一个训练模型的循环，它的目的是在每个epoch中执行训练和测试...最后，这些列表会被保存到Loss、Accuracy、Recall_test、Precision_test、F1_score_test和kappa_test中。请问还有其他问题吗？

import numpy as np import pandas as pd from sklearn.model_selection import train_test_split from sklearn.preprocessing import StandardScaler from sklearn.tree import DecisionTreeClassifier from sklearn.metrics import accuracy_score, precision_score, recall_score, f1_score # 加载数据 data = pd.read_csv('heart_2020_cleaned.csv') # 特征工程 X = data.drop('HeartDisease', axis=1) y = data['HeartDisease'] X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42) scaler = StandardScaler() X_train = scaler.fit_transform(X_train) X_test = scaler.transform(X_test) # 模型训练 model = DecisionTreeClassifier(max_depth=3) model.fit(X_train, y_train) # 模型评估 y_pred = model.predict(X_test) acc = accuracy_score(y_test, y_pred) precision = precision_score(y_test, y_pred) recall = recall_score(y_test, y_pred) f1 = f1_score(y_test, y_pred) print('Accuracy:', acc) print('Precision:', precision) print('Recall:', recall) print('F1:', f1)转换数值类型

上述代码中似乎没有出现需要转换数值类型的情况，如果您需要将某个特征的数据类型从字符串转换为数值型，可以使用以下代码： python data['SomeFeature'] = data['SomeFeature'].astype(float) ...

from sklearn.datasets import load_breast_cancer from sklearn.model_selection import train_test_split from sklearn.ensemble import RandomForestClassifier from sklearn.metrics import accuracy_score from lime.lime_tabular import LimeTabularExplainer import numpy as np import pandas as pd # 准备数据 data = load_breast_cancer() # df=pd.DataFrame(data.data,columns=data.feature_names) # df['target']=data.target # print(df.head()) X = data.data y = data.target # 划分训练集和测试集 X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.3, random_state=42) # 训练模型 rfc = RandomForestClassifier(n_estimators=100, random_state=42) rfc.fit(X_train, y_train) # 预测结果 y_pred = rfc.predict(X_test) accuracy = accuracy_score(y_test, y_pred) print(f"Accuracy:{accuracy:.3f}") # 解释模型结果 def explain_sample(x, model, feature_names): explainer = LimeTabularExplainer(X_train, feature_names=feature_names, class_names=data.target_names) exp = explainer.explain_instance(x, model.predict_proba, num_features=len(feature_names)) return exp # 随机选择一个测试样本并解释 idx = np.random.randint(len(X_test)) x=X_test[idx] exp=explain_sample(x,rfc,data.feature_names) fig=exp.as_pyplot_figure() print(f"Sample index:{idx}") fig.show()优化一下这段代码，让可视化图片不要一闪而过

accuracy = accuracy_score(y_test, y_pred) print(f"Accuracy:{accuracy:.3f}") # 解释模型结果 def explain_sample(x, model, feature_names): explainer = LimeTabularExplainer(X_train, feature_names=...

使用以下代码：# 导入随机森林模型 from sklearn.ensemble import RandomForestClassifier # 将数据集分为训练集和测试集 from sklearn.model_selection import train_test_split train, test = train_test_split(data, test_size=0.3, random_state=0) # 创建随机森林模型 rfc = RandomForestClassifier(n_estimators=100, max_depth=5, random_state=0) # 使用训练集对模型进行训练 rfc.fit(train.drop(['id', 'yearin'], axis=1), train['stroke_or_cvd']) # 对测试集进行预测并评估模型的准确性 from sklearn.metrics import accuracy_score pred = rfc.predict(test.drop(['id', 'yearin'], axis=1)) accuracy_score(test['stroke_or_cvd'], pred) 出现以下问题：NameError: name 'data' is not defined如何解决？

rfc = RandomForestClassifier(n_estimators=100, max_depth=5, random_state=0) # 使用训练集对模型进行训练 rfc.fit(train.drop(['id', 'yearin'], axis=1), train['stroke_or_cvd']) # 对测试集进行预测并评估...

# 导入相关库 import pandas as pd import matplotlib.pyplot as plt from sklearn.model_selection import train_test_split from sklearn.tree import DecisionTreeClassifier from sklearn.ensemble import RandomForestClassifier from sklearn.metrics import accuracy_score, precision_score, recall_score, f1_score,roc_auc_score,roc_curve # 读取数据 df = pd.read_csv('C:/Users/E15/Desktop/机器学习作业/第一次作业/第一次作业/三个数据集/Titanic泰坦尼克号.csv') # 数据预处理 df = df.drop(["Name", "Ticket", "Cabin"], axis=1) # 删除无用特征 df = pd.get_dummies(df, columns=["Sex", "Embarked"]) # 将分类特征转换成独热编码 df = df.fillna(df.mean()) # 使用平均值填充缺失值 # 划分数据集 X = df.drop(["Survived"], axis=1) y = df["Survived"] X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42) # 决策树 dtc = DecisionTreeClassifier(random_state=42) dtc.fit(X_train, y_train) y_pred_dtc = dtc.predict(X_test) # 剪枝决策树 pruned_dtc = DecisionTreeClassifier(random_state=42, ccp_alpha=0.015) pruned_dtc.fit(X_train, y_train) y_pred_pruned_dtc = pruned_dtc.predict(X_test) # 随机森林 rfc = RandomForestClassifier(n_estimators=100, random_state=42) rfc.fit(X_train, y_train) y_pred_rfc = rfc.predict(X_test) # 计算评价指标 metrics = {"Accuracy": accuracy_score, "Precision": precision_score, "Recall": recall_score, "F1-Score": f1_score, "AUC": roc_auc_score} results = {} for key in metrics.keys(): if key == "AUC": results[key] = {"Decision Tree": roc_auc_score(y_test, y_pred_dtc), "Pruned Decision Tree": roc_auc_score(y_test, y_pred_pruned_dtc), "Random Forest": roc_auc_score(y_test, y_pred_rfc)} else: results[key] = {"Decision Tree": metrics[key](y_test, y_pred_dtc), "Pruned Decision Tree": metrics[key](y_test, y_pred_pruned_dtc), "Random Forest": metrics[key](y_test, y_pred_rfc)} # 打印评价指标的表格 results_df = pd.DataFrame(results) print(results_df)怎么打印auv图

fpr_rfc, tpr_rfc, thresholds_rfc = roc_curve(y_test, y_pred_rfc) # 绘制ROC曲线 plt.figure(figsize=(8, 6)) plt.plot(fpr_dtc, tpr_dtc, label='Decision Tree') plt.plot(fpr_pruned_dtc, tpr_pruned_dtc, ...

forest = RandomForestClassifier(max_depth=6, min_samples_leaf=10, n_estimators=1000) def muti_score(model): # warnings.filterwarnings('ignore') accuracy = cross_val_score(model, X_train, Y_train, scoring='accuracy', cv=5) precision = cross_val_score(model, X_train, Y_train, scoring='precision', cv=5) recall = cross_val_score(model, X_train, Y_train, scoring='recall', cv=5) f1_score = cross_val_score(model, X_train, Y_train, scoring='f1', cv=5) auc = cross_val_score(model, X_train, Y_train, scoring='roc_auc', cv=5) print("准确率:",accuracy.mean()) print("精确率:",precision.mean()) print("召回率:",recall.mean()) print("F1_score:",f1_score.mean()) print("AUC:",auc.mean()) muti_score(forest)

这是一段Python代码，定义了一个名为forest的随机森林分类器模型，其中max_depth表示树的最大深度为6，min_samples_leaf表示最小叶子节点样本数为10，n_estimators表示模型中树的数量为1000。另外，代码还定义了一...

import numpy as np import pandas as pd from sklearn.model_selection import train_test_split, GridSearchCV from sklearn.metrics import accuracy_score, precision_score, recall_score, f1_score from sklearn.metrics import confusion_matrix import matplotlib.pyplot as plt from termcolor import colored as cl import itertools from sklearn.preprocessing import StandardScaler from sklearn.tree import DecisionTreeClassifier from sklearn.neighbors import KNeighborsClassifier from sklearn.linear_model import LogisticRegression from sklearn.svm import SVC from sklearn.ensemble import RandomForestClassifier from xgboost import XGBClassifier from sklearn.neural_network import MLPClassifier from sklearn.ensemble import VotingClassifier # 定义模型评估函数 def evaluate_model(y_true, y_pred): accuracy = accuracy_score(y_true, y_pred) precision = precision_score(y_true, y_pred, pos_label='Good') recall = recall_score(y_true, y_pred, pos_label='Good') f1 = f1_score(y_true, y_pred, pos_label='Good') print("准确率:", accuracy) print("精确率:", precision) print("召回率:", recall) print("F1 分数:", f1) # 读取数据集 data = pd.read_csv('F:\数据\大学\专业课\模式识别\大作业\数据集1\data clean Terklasifikasi baru 22 juli 2015 all.csv', skiprows=16, header=None) # 检查数据集 print(data.head()) # 划分特征向量和标签 X = data.iloc[:, :-1] y = data.iloc[:, -1] # 划分训练集和测试集 X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42) # 6. XGBoost xgb = XGBClassifier(max_depth=4) y_test = np.array(y_test, dtype=int) xgb.fit(X_train, y_train) xgb_pred = xgb.predict(X_test) print("\nXGBoost评估结果：") evaluate_model(y_test, xgb_pred)

2. 定义模型评估函数：evaluate_model(y_true, y_pred)，该函数用于计算模型预测结果的准确率、精确率、召回率和F1分数。 3. 读取数据集：使用pandas库的read_csv()函数读取数据集。 4. 划分特征向量和标签：将...

f1 = f1_score(y_pred, y_test, average='macro') #模型评估准确性、精准度 # 假设 y_true 是真实标签，y_pred 是模型预测标签 print('accuracy %s' % accuracy_score(y_pred, y_test)) print('precision %s' % precision_score(y_pred, y_test, average='weighted') #print('recall %s' % recall_score(y_pred, y_test, average='weighted') print('f1-score %s' % f1_score(y_pred, y_test, average='macro'))报错ivalid syntax

print('accuracy %s' % accuracy_score(y_pred, y_test)) print('precision %s' % precision_score(y_pred, y_test, average='weighted')) #print('recall %s' % recall_score(y_pred, y_test, average='weighted'...

import pandas as pd from sklearn.model_selection import train_test_split # 导入数据并添加列名 columns = ['buying', 'maint', 'doors', 'persons', 'lug_boot', 'safety', 'Class_Values'] car_data = pd.read_csv('car.data', header=None, names=columns) # 将 Class Values 转换为数字 class_map = {'unacc': 0, 'acc': 1, 'good': 2, 'vgood': 3} car_data['Class_Values'] = car_data['Class_Values'].map(class_map) # 划分训练集和测试集 train_data, test_data = train_test_split(car_data, test_size=0.2, random_state=42) from sklearn.tree import DecisionTreeClassifier from sklearn.metrics import accuracy_score, precision_score, recall_score, f1_score # 定义特征变量和目标变量 feature_cols = ['buying', 'maint', 'doors', 'persons', 'lug_boot', 'safety'] target_col = 'Class_Values' # 建立决策树模型 dt = DecisionTreeClassifier(max_depth=5) dt.fit(train_data[feature_cols], train_data[target_col]) # 对测试数据进行预测 y_pred = dt.predict(test_data[feature_cols]) # 计算评估指标 accuracy = accuracy_score(test_data[target_col], y_pred) precision = precision_score(test_data[target_col], y_pred, average='macro') recall = recall_score(test_data[target_col], y_pred, average='macro') f1 = f1_score(test_data[target_col], y_pred, average='macro') print('Accuracy:', accuracy) print('Precision:', precision) print('Recall:', recall) print('F1 Score:', f1)

这是一个使用决策树模型进行分类的示例代码。首先，导入 Pandas 和 Scikit-learn 库，读取 CSV 文件并添加列名...对测试数据进行预测，并计算评估指标，包括准确率、精确率、召回率、F1 分数。最后打印出这些指标的值。

acc = accuracy_score(label_test, y_pred) precision = precision_score(label_test, y_pred) recall = recall_score(label_test, y_pred) f1 = f1_score(label_test, y_pred) print('Accuracy: {:.2f}'.format(acc)) print('Precision: {:.2f}'.format(precision)) print('Recall: {:.2f}'.format(recall)) print('F1 Score: {:.2f}'.format(f1)) 出现问题ValueError: Target is multilabel-indicator but average='binary'. Please choose another average setting, one of [None, 'micro', 'macro', 'weighted', 'samples'].怎么改代码

precision = precision_score(label_test, y_pred, average='micro') recall = recall_score(label_test, y_pred, average='micro') f1 = f1_score(label_test, y_pred, average='micro') print('Accuracy: {:.2f}...

import pandas as pd from sklearn.model_selection import train_test_split # 导入数据并添加列名 columns = ['buying', 'maint', 'doors', 'persons', 'lug_boot', 'safety', 'Class_Values'] car_data = pd.read_csv('car.data', header=None, names=columns) # 将 Class Values 转换为数字 class_map = {'unacc': 0, 'acc': 1, 'good': 2, 'vgood': 3} car_data['Class_Values'] = car_data['Class_Values'].map(class_map) # 划分训练集和测试集 train_data, test_data = train_test_split(car_data, test_size=0.2, random_state=42) from sklearn.tree import DecisionTreeClassifier from sklearn.metrics import accuracy_score, precision_score, recall_score, f1_score # 定义特征变量和目标变量 feature_cols = ['buying', 'maint', 'doors', 'persons', 'lug_boot', 'safety'] target_col = 'Class_Values' # 建立决策树模型 dt = DecisionTreeClassifier(max_depth=5) dt.fit(train_data[feature_cols], train_data[target_col]) # 对测试数据进行预测 y_pred = dt.predict(test_data[feature_cols]) # 计算评估指标 accuracy = accuracy_score(test_data[target_col], y_pred) precision = precision_score(test_data[target_col], y_pred, average='macro') recall = recall_score(test_data[target_col], y_pred, average='macro') f1 = f1_score(test_data[target_col], y_pred, average='macro') print('Accuracy:', accuracy) print('Precision:', precision) print('Recall:', recall) print('F1 Score:', f1)ValueError: could not convert string to float: 'vhigh'

这是一个值错误（ValueError）的异常，原因是在决策树模型中，特征变量包含字符串类型的数据，无法进行计算，需要将字符串类型的数据转换为数字类型的数据。可以使用sklearn.preprocessing中的LabelEncoder或OneHot...

import matplotlib.pyplot as plt import pandas as pd import seaborn as sns from sklearn.ensemble import RandomForestClassifier from sklearn.metrics import accuracy_score from sklearn.model_selection import train_test_split # 读取训练集和测试集数据 train_data = pd.read_csv(r'C:\ADULT\Titanic\train.csv') test_data = pd.read_csv(r'C:\ADULT\Titanic\test.csv') # 统计训练集和测试集缺失值数目 print(train_data.isnull().sum()) print(test_data.isnull().sum()) # 处理 Age, Fare 和 Embarked 缺失值 most_lists = ['Age', 'Fare', 'Embarked'] for col in most_lists: train_data[col] = train_data[col].fillna(train_data[col].mode()[0]) test_data[col] = test_data[col].fillna(test_data[col].mode()[0]) # 拆分 X, Y 数据并将分类变量 one-hot 编码 y_train_data = train_data['Survived'] features = ['Pclass', 'Age', 'SibSp', 'Parch', 'Fare', 'Sex', 'Embarked'] X_train_data = pd.get_dummies(train_data[features]) X_test_data = pd.get_dummies(test_data[features]) # 合并训练集 Y 和 X 数据，并创建乘客信息分类变量 train_data_selected = pd.concat([y_train_data, X_train_data], axis=1) print(train_data_selected) cate_features = ['Pclass', 'SibSp', 'Parch', 'Sex', 'Embarked', 'Age_category', 'Fare_category'] train_data['Age_category'] = pd.cut(train_data.Fare, bins=range(0, 100, 10)).astype(str) train_data['Fare_category'] = pd.cut(train_data.Fare, bins=list(range(-20, 110, 20)) + [800]).astype(str) print(train_data) # 统计各分类变量的分布并作出可视化呈现 plt.figure(figsize=(18, 16)) plt.subplots_adjust(hspace=0.3, wspace=0.3) for i, cate_feature in enumerate(cate_features): plt.subplot(7, 2, 2 * i + 1) sns.histplot(x=cate_feature, data=train_data, stat="density") plt.xlabel(cate_feature) plt.ylabel('Density') plt.subplot(7, 2, 2 * i + 2) sns.lineplot(x=cate_feature, y='Survived', data=train_data) plt.xlabel(cate_feature) plt.ylabel('Survived') plt.show() # 绘制点状的相关系数热图 plt.figure(figsize=(12, 8)) sns.heatmap(train_data_selected.corr(), vmin=-1, vmax=1, annot=True) plt.show() sourceRow = 891 output = pd.DataFrame({'PassengerId': test_data.PassengerId, 'Survived': predictions}) output.head() # 保存结果 output.to_csv('gender_submission.csv', index=False) print(output) train_X, test_X, train_y, test_y = train_test_split(X_train_data, y_train_data, train_size=0.8, random_state=42) print("随机森林分类结果") y_pred_train1 = train_data.predict(train_X) y_pred_test1 = train_data.predict(test_X) accuracy_train1 = accuracy_score(train_y, y_pred_train1) accuracy_test1 = accuracy_score(test_y, y_pred_test1) print("训练集——随机森林分类器准确率为：", accuracy_train1) print("测试集——随机森林分类器准确率为：", accuracy_train1)

在你的代码中，你正在尝试从 train_data 对象上...同时，你需要使用 rfc.fit(train_X, train_y) 在训练数据上拟合分类器，然后使用 rfc.predict(train_X) 和 rfc.predict(test_X) 在训练集和测试集上进行预测。

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