python统计应用

墨蓝 2023-09-23 12:57 75阅读 0赞

1.简答题  
请打开:资料–课 程所用数据一-  
Incomregression.csv  
利用该csv文件中的数据，选择一种python编  
译器编写python程序，完成以下内容:  
读取数据，并选择变量中类型  
为"float64" 的变量，对这些变量进行描  
述性分析( 10分)  
2.对.上述类型为"float64"的变量计算两两相  
关系数，列出相关系数矩阵( 10分)  
3.用绘图程序(可以用matplotib或其他python  
第三方包)绘制MonthlyIncome, DebtRatio,  
RevolvingL tilizationOfUnsecuredl ines三个变  
量的3d散点图( 20分)  
4.绘制Monthlyncome与DebtRatio,  
Monthlyincome与  
RevolvingL hizationOfUnsecuredl ines,  
Monthlyincome与age,三幅2d散点图( 20分)  
5.调用statsmodels模块，运用最小二乘法拟合  
线性回归模型，模型因变量为Monthlyincome  
自变量为age、  
RevolvingUilzationOfUnsecuredl ines、  
DebtRatio,并提供所有拟合模型后的信息报告  
(20分)  
6.调用scikitlearn模块，仍用回归分析方法拟合  
线性回归模型，模型因变量为Monthlyncome  
自变量为age、  
RevolvingUtlzationOfUnsecuredl ines、  
DebtRatio,并进行5折交叉验证( 20分)

[资源下载][Link 1]

import pandas as pd
    import numpy as np
    df = pd.read_csv('Incomregression.csv',engine='python',dtype=np.float64)
    df.describe()
    df.corr()
    
    import matplotlib.pyplot as plt
    from mpl_toolkits.mplot3d import Axes3D
    fig =plt.figure().add_subplot(111, projection = '3d')
    fig.scatter(df['MonthlyIncome'], df['DebtRatio'], df['RevolvingUtilizationOfUnsecuredLines'], c = 'r', marker = '^')
    fig.set_xlabel('X Label')
    fig.set_ylabel('Y Label')
    fig.set_zlabel('Z Label')
    plt.show()
    
    import matplotlib.pyplot as plt
    fig=plt.figure()
    ax1=plt.subplot(3,1,1) 
    plt.plot(df['MonthlyIncome'],df['DebtRatio'])
    ax1=plt.subplot(3,1,2) 
    plt.plot(df['MonthlyIncome'],df['RevolvingUtilizationOfUnsecuredLines'])
    ax1=plt.subplot(3,1,3) 
    plt.plot(df['MonthlyIncome'],df['age'])
    
    import statsmodels.formula.api as smf
    formula = "MonthlyIncome ~ age + RevolvingUtilizationOfUnsecuredLines + DebtRatio"
    model = smf.ols(formula, df)
    results = model.fit()
    print(results.summary())
    
    from sklearn.linear_model import LinearRegression
    from sklearn import linear_model
    from sklearn.model_selection import train_test_split
    x1=df[['age']]
    x2=df[['RevolvingUtilizationOfUnsecuredLines']]
    x3=df[['DebtRatio']]
    y=df[['MonthlyIncome']]
    x1_train,x1_test,y_train,y_test=train_test_split(x1,y,test_size=0.2,random_state=42)
    x2_train,x2_test,y_train,y_test=train_test_split(x2,y,test_size=0.2,random_state=42)
    x3_train,x3_test,y_train,y_test=train_test_split(x3,y,test_size=0.2,random_state=42)
    model1 = LinearRegression()
    model1.fit(x1_train, y_train)
    print (model1.coef_)
    print (model1.intercept_)
    y_pred = model1.predict(x1_test)
    model2 = LinearRegression()
    model2.fit(x2_train, y_train)
    print (model2.coef_)
    print (model2.intercept_)
    y_pred = model2.predict(x2_test)
    model3 = LinearRegression()
    model3.fit(x3_train, y_train)
    print (model3.coef_)
    print (model3.intercept_)
    y_pred = model3.predict(x3_test)
    from sklearn.model_selection import cross_val_predict
    from sklearn import metrics
    predicted=cross_val_predict(model1,x1,y,cv=5)
    cross_mse=metrics.mean_squared_error(y,predicted)
    cross_rmse=np.sqrt(metrics.mean_squared_error(y,predicted))
    print('CROSS_MSE',cross_mse)
    print('CROSS_RMSE',cross_rmse)
    predicted=cross_val_predict(model2,x2,y,cv=5)
    cross_mse=metrics.mean_squared_error(y,predicted)
    cross_rmse=np.sqrt(metrics.mean_squared_error(y,predicted))
    print('CROSS_MSE',cross_mse)
    print('CROSS_RMSE',cross_rmse)
    predicted=cross_val_predict(model3,x3,y,cv=5)
    cross_mse=metrics.mean_squared_error(y,predicted)
    cross_rmse=np.sqrt(metrics.mean_squared_error(y,predicted))
    print('CROSS_MSE',cross_mse)
    print('CROSS_RMSE',cross_rmse)

[Link 1]: https://download.csdn.net/download/qq_15719613/86844726