import pandas as pd from sklearn.ensemble import RandomForestClassifier from sklearn.metrics import accuracy_score, confusion_matrix,classification_report, roc_curve, auc import seaborn as sns import matplotlib.pyplot as plt # 读取数据 data = pd.read_excel('E:/桌面/预测脆弱性/20230523/预测样本/预测样本.xlsx') # 分割训练集和验证集 train_data = data.sample(frac=0.8, random_state=1) test_data = data.drop(train_data.index) # 定义特征变量和目标变量 features = ['高程', '起伏度', '桥梁长', '道路长', '平均坡度', '平均地温', 'T小于0', '相态'] target = '交通风险' # 训练随机森林模型 rf = RandomForestClassifier(n_estimators=100, random_state=1) rf.fit(train_data[features], train_data[target]) # 在验证集上进行预测并计算精度、召回率和F1值等指标 pred = rf.predict(test_data[features]) accuracy = accuracy_score(test_data[target], pred) confusion_mat = confusion_matrix(test_data[target], pred) classification_rep = classification_report(test_data[target], pred) print('Accuracy:', accuracy) print('Confusion matrix:') print(confusion_mat) print('Classification report:') print(classification_rep) # 输出混淆矩阵图片 sns.heatmap(confusion_mat, annot=True, cmap="Blues") plt.show() # 计算并绘制ROC曲线和AUC值 fpr, tpr, thresholds = roc_curve(test_data[target], pred) roc_auc = auc(fpr, tpr) print('AUC:', roc_auc) plt.figure() lw = 2 plt.plot(fpr, tpr, color='darkorange', lw=lw, label='ROC curve (area = %0.2f)' % roc_auc) plt.plot([0, 1], [0, 1], color='navy', lw=lw, linestyle='--') plt.xlim([0.0, 1.0]) plt.ylim([0.0, 1.05]) plt.xlabel('False Positive Rate') plt.ylabel('True Positive Rate') plt.title('Receiver operating characteristic') plt.legend(loc="lower right") plt.show() # 读取新数据文件并预测结果 new_data = pd.read_excel('E:/桌面/预测脆弱性/20230523/预测样本/预测结果/交通风险预测096.xlsx') new_pred = rf.predict(new_data[features]) new_data['交通风险预测结果'] = new_pred new_data.to_excel('E:/桌面/预测脆弱性/20230523/预测样本/预测结果/交通风险预测096结果.xlsx', index=False)改进代码使用多元roc曲线

在Python中想运行from sklearn.model_selection import train_test_split from sklearn.decomposition import PCA import pandas as pd from sklearn import svm import numpy as np import math import matplotlib.pyplot as plt import matplotlib as mpl from matplotlib import colors from sklearn.model_selection import train_test_split from sklearn import datasets from matplotlib.colors import ListedColormap from sklearn.svm import SVC from sklearn.preprocessing import StandardScaler from sklearn.model_selection import StratifiedShuffleSplit,StratifiedKFold from sklearn.model_selection import GridSearchCV from sklearn.model_selection import GridSearchCV, LeaveOneOut, cross_val_predict from sklearn.model_selection import KFold from sklearn.linear_model import LogisticRegression from sklearn.naive_bayes import GaussianNB from sklearn.neighbors import KNeighborsClassifier from sklearn import svm from sklearn.tree import DecisionTreeClassifier from sklearn.ensemble import RandomForestClassifier from sklearn.metrics import roc_auc_score from sklearn.metrics import roc_auc_score import math import datetime import multiprocessing as mp from sklearn.ensemble import StackingClassifier from sklearn.pipeline import make_pipeline from sklearn.svm import LinearSVC import random怎么操作

from sklearn.metrics import roc_auc_score import datetime import multiprocessing as mp from sklearn.ensemble import StackingClassifier from sklearn.pipeline import make_pipeline from sklearn.svm ...

import pandas as pd from sklearn import svm from sklearn.model_selection import train_test_split from sklearn.metrics import accuracy_score import matplotlib.pyplot as plt

- from sklearn.metrics import accuracy_score：从scikit-learn库中导入accuracy_score函数，用于计算分类器的准确率。 - import matplotlib.pyplot as plt：导入matplotlib库，并将其命名为plt，用于数据可视...

import pandas as pd from sklearn.model_selection import train_test_split from sklearn.neighbors import KNeighborsClassifier from sklearn.preprocessing import StandardScaler

这段代码主要是导入了一些常用的数据处理和机器学习库，包括pandas、sklearn.model_selection、sklearn.neighbors和sklearn.preprocessing。其中pandas库用于数据处理，sklearn.model_selection库用于模型选择和数据...

import numpy as np import pandas as pd from sklearn.neighbors import KNeighborsClassifier from sklearn.model_selection import train_test_split from sklearn.metrics import accuracy_score为什么有淡黄色波浪线

1. 确保已经安装了需要的模块（NumPy、Pandas、Scikit-learn等）。您可以在终端中使用pip install命令来安装这些模块。 2. 在VS Code中打开您的Python文件。如果您还没有安装Python插件，请安装它。您可以在扩展...

import pandas as pd import os from sklearn.model_selection import train_test_split from sklearn.ensemble import RandomForestClassifier from sklearn.metrics import accuracy_score # 计算准确性 import numpy as np from sklearn.tree import plot_tree import matplotlib.pyplot as plt # 画图 from sklearn.metrics import confusion_matrix # 绘制混淆矩阵时使用 from sklearn.metrics import roc_curve, auc # 绘制ROC曲线时使用 from sklearn.preprocessing import label_binarize # 使用sklearn中的LabelBinarizer可以将多分类标签转化为二分类标签 from sklearn.preprocessing import LabelEncoder from sklearn.preprocessing import LabelBinarizer

您的代码看起来像是在使用Python中的一些流行的机器学习库...- 使用roc_curve和auc函数绘制ROC曲线； - 使用LabelEncoder和LabelBinarizer函数将标签进行编码。总的来说，这些功能可以帮助您构建和评估机器学习模型。

import torch import pandas as pd from sklearn.preprocessing import LabelEncoder, OneHotEncoder

这段代码导入了三个库：torch、pandas和sklearn。torch是PyTorch深度学习框架的Python接口，pandas是一个用于数据处理和分析的Python库，sklearn则是Python中流行的机器学习库。这段代码还使用了sklearn库中的两个类...

import pandas as pdfrom sklearn.model_selection File "C:\Users\86130\AppData\Local\Temp\ipykernel_25132\2033069697.py", line 1 import pandas as pdfrom sklearn.model_selection ^ SyntaxError: invalid syntax

这段代码存在语法错误，可能是因为没有在...import pandas as pd from sklearn.model_selection import ... 这里的...表示具体要导入的模块或函数。请注意，在导入语句之间要添加一个空行，这是Python的惯例。

import pandas as pd from sklearn import tree from sklearn.ensemble import RandomForestClassifier import matplotlib.pyplot as plt import numpy as np heart=pd.read_csv("D:\Anaconda1\heart.csv") heart.head()

- from sklearn.ensemble import RandomForestClassifier：从sklearn库中导入随机森林分类器。 - import matplotlib.pyplot as plt：导入matplotlib库，并将其命名为plt，方便后续使用。 - import numpy as np...

解释以下代码from sklearn.ensemble import RandomForestRegressor from sklearn.model_selection import train_test_split import pandas as pd

其中，RandomForestRegressor是一个用于回归问题的随机森林模型，train_test_split函数用于将数据集划分为训练集和测试集，pandas库中的pd模块用于数据处理和分析。这段代码的作用是为了在使用随机森林回归模型进行...

import pandas as pd from sklearn.model_selection import train_test_split, GridSearchCV from sklearn.tree import DecisionTreeClassifier from sklearn.metrics import accuracy_score import numpy as np data = pd.read_csv('iris.csv', header=None, names=['sepald

这段代码的作用是读取iris数据集，然后使用DecisionTreeClassifier算法进行...7. 使用accuracy_score函数计算模型在测试集上的准确率，并将结果存储到acc变量中。该段代码中还有一些未完成的部分，可以继续补充完整。

import pandas as pd import numpy as np import matplotlib.pyplot as plt from sklearn.model_selection import train_test_split from sklearn.preprocessing import MinMaxScaler from sklearn.linear_model import LogisticRegression from sklearn.tree import DecisionTreeClassifier from sklearn.neighbors import KNeighborsClassifier from sklearn.svm import SVC from sklearn.metrics import classification_report from sklearn.metrics import confusion_matrix

这段代码是在 Python 中导入了一些常用的机器学习库和模块，包括 pandas、numpy、matplotlib、sklearn 等。其中： - pandas 是 Python 中常用的数据分析库，可以用来读取和处理数据； - numpy 是 Python 中常用的...

解释这段代码import numpy as np import pandas as pd from datetime import datetime from scipy.stats import skew from scipy.special import boxcox1p from scipy.stats import boxcox_normmax from sklearn.linear_model import ElasticNetCV, LassoCV, RidgeCV, Ridge from sklearn.ensemble import GradientBoostingRegressor from sklearn.svm import SVR from sklearn.pipeline import make_pipeline from sklearn.preprocessing import RobustScaler, StandardScaler from sklearn.model_selection import KFold, cross_val_score from sklearn.metrics import mean_squared_error as mse from sklearn.metrics import make_scorer from sklearn.neighbors import LocalOutlierFactor from sklearn.linear_model import LinearRegression from mlxtend.regressor import StackingCVRegressor # from xgboost import XGBRegressor # from lightgbm import LGBMRegressor import matplotlib.pyplot as plt import seaborn as sns

- import pandas as pd：导入Pandas库，并将其简写为pd，以方便使用。 - from datetime import datetime：从datetime模块中导入datetime函数，用于处理时间数据。 - from scipy.stats import skew：从scipy....

import matplotlib.pyplot as plt from sklearn.datasets import load_boston from sklearn.model_selection import cross_val_score from sklearn.linear_model import LinearRegression from sklearn.metrics import mean_squared_error import pandas as pd

这段代码是用来导入所需的Python库，包括matplotlib用于数据可视化，load_boston用于加载波士顿房价数据集，cross_val_score和LinearRegression用于模型训练和评估，mean_squared_error用于计算均方误差，pandas用于...

from sklearn.datasets import load_boston import numpy as np import pandas as pd import matplotlib.pyplot as plt from sklearn.linear_model import LassoCV import seaborn as sns from sklearn.preprocessing import StandardScaler from sklearn.model_selection import train_test_split

- pandas：用于数据处理和分析，如数据读取、转换、合并等。 - matplotlib.pyplot：用于绘制数据可视化图表，如折线图、散点图等。 - sklearn.linear_model：用于线性回归模型的构建和训练。 - seaborn：基于...

import pandas as pd import numpy as np from sklearn.model_selection import train_test_split from sklearn.linear_model import LogisticRegression from sklearn import metrics import matplotlib.pyplot as plt

- import pandas as pd 导入了 pandas 库，并将其重命名为 pd，用于数据处理和分析。 - import numpy as np 导入了 numpy 库，并将其重命名为 np，用于数值计算和数组操作。 - from sklearn.model_selection ...

写完这些代码后： import pandas as pd import numpy as np from sklearn.preprocessing import StandardScaler from sklearn.model_selection import train_test_split from sklearn.metrics import confusion_matrix,classification_report from sklearn.metrics import roc_curve import matplotlib.pyplot as plt from sklearn.linear_model import logisticRegression 出现了下面的错误 partially initialized module 'sklearn' has no attribute 'version' (most likely due to a circular import)请问这个错误怎么修改

这个错误通常是由于环境问题导致的。尝试升级 scikit-learn 库到最新版本，可以使用以下命令来升级： ...另外，确保在代码文件中没有命名为 "sklearn.py" 的文件，这可能会导致命名冲突并导致该错误。

import pandas as pd import numpy as np import scipy.stats as stats import seaborn as sns from sklearn.metrics import RocCurveDisplay from sklearn.model_selection import train_test_split from sklearn.metrics import confusion_matrix,accuracy_score from sklearn.preprocessing import StandardScaler from sklearn.linear_model import LogisticRegression from sklearn import tree from sklearn.decomposition import PCA import matplotlib.pyplot as plt from sklearn.tree import DecisionTreeClassifier请在此基础上续写代码块，要求是（1）读入数据后，选取自变量"sysBP", "diaBP","age","totChol","BMI", "heartRate", "glucose"记为X，因变量"TenYearCHD"记为y，组成新的数据集。¶

from sklearn.metrics import confusion_matrix,accuracy_score from sklearn.preprocessing import StandardScaler from sklearn.linear_model import LogisticRegression from sklearn import tree from ...

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import pandas as pdfrom sklearn.model_selection File "C:\Users\86130\AppData\Local\Temp\ipykernel_25132\2033069697.py", line 1 import pandas as pdfrom sklearn.model_selection ^ SyntaxError: invalid syntax

import pandas as pd from sklearn import tree from sklearn.ensemble import RandomForestClassifier import matplotlib.pyplot as plt import numpy as np heart=pd.read_csv("D:\Anaconda1\heart.csv") heart.head()

解释以下代码from sklearn.ensemble import RandomForestRegressor from sklearn.model_selection import train_test_split import pandas as pd

import pandas as pd from sklearn.model_selection import train_test_split, GridSearchCV from sklearn.tree import DecisionTreeClassifier from sklearn.metrics import accuracy_score import numpy as np data = pd.read_csv('iris.csv', header=None, names=['sepald

import matplotlib.pyplot as plt from sklearn.datasets import load_boston from sklearn.model_selection import cross_val_score from sklearn.linear_model import LinearRegression from sklearn.metrics import mean_squared_error import pandas as pd

from sklearn.datasets import load_boston import numpy as np import pandas as pd import matplotlib.pyplot as plt from sklearn.linear_model import LassoCV import seaborn as sns from sklearn.preprocessing import StandardScaler from sklearn.model_selection import train_test_split

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