具体文档戳下方网站
代码如下：
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
import scipy.stats as stats # adult_data = pd.read_csv("adult.data")
adult_test = pd.read_csv("adult.test", header=None, na_values=' ?') # 不要表头
adult_train = pd.read_csv("adult.data", header=None, na_values=' ?')
Names = ['age', 'workclass', 'fnlwgt', 'education', 'education-num', 'marital-status', 'occupation',
'relationship', 'race', 'sex', 'capital-gain', 'capital-loss', 'hours-per-week',
'native-country', 'income']
adult_test.columns = Names
adult_train.columns = Names
adult_train.info()
# print(adult_train.head())
# -------------------------------------------数据查看-------------------------------------------
#
# # ------------------------------对分类型数据的处理------------------------------
#
# # --------------对workclass的处理----------------
# work_income_less = adult_train['workclass'][adult_train['income'] == ' <=50K'].value_counts()
# work_income_more = adult_train['workclass'][adult_train['income'] == ' >50K'].value_counts()
# work_income = pd.concat([work_income_less, work_income_more], axis=1, sort=True)
# work_income.columns = ['less than 50K', 'more than 50K']
# work_income.fillna(0, inplace=True)
# work_income.plot(kind='bar', figsize=(10, 6))
# plt.xticks(rotation=45, size=6)
# plt.title('Salery about Workclass', size=20)
# # plt.savefig("Salery_about_workclass.png")
# # 独立性检验
# from scipy.stats import chi2_contingency
# g, p, dof, expected = chi2_contingency(work_income)
# '''
# g: z值
# p: 概率值
# dof: *度
# expected: 期望值
# '''
# # 绘制*度为dof的卡方分布表
# from scipy.stats import chi2
# import numpy as np
# x = np.linspace(chi2.ppf(0.01, dof), chi2.ppf(0.99, dof), 100)
# plt.figure()
# plt.plot(x,chi2.pdf(x,dof))
#
# # 以95%置信区间，查看小概率事件区间
# plt.axvline(chi2.ppf(0.975, dof), color='r')
# plt.axvline(chi2.ppf(0.025, dof), color='r')
# plt.title('chi2 distribution'+' whose dof is '+str(dof),size=20)
# plt.text(chi2.ppf(0.975, dof), 0.02, 'q=0.95,z='+str(round(chi2.ppf(0.975, dof), 2)), ha='right', va='top', color='g', alpha=0.8, size=15)
# plt.text(chi2.ppf(0.025, dof), 0.02, 'q=0.05,z='+str(round(chi2.ppf(0.025, dof), 2)), ha='left', va='top', color='g', alpha=0.8, size=15)
# plt.xlabel('g='+str(round(g,2)), color='orange',size=15)
# # plt.savefig("W_and_Income_chi2_distribution.png")
#
# # --------------对education的处理----------------
# education_income_less = adult_train['education'][adult_train['income'] == ' <=50K'].value_counts()
# education_income_more = adult_train['education'][adult_train['income'] == ' >50K'].value_counts()
# education_income = pd.concat([education_income_less, education_income_more], axis=1, sort=True)
# education_income.columns = ['less than 50K', 'more than 50K']
# education_income.fillna(0, inplace=True)
# education_income.plot(kind='bar', figsize=(10, 6))
# plt.xticks(rotation=45, size=6)
# plt.title('Salery about education', size=20)
# # plt.savefig("Salery_about_education.png")
#
# # 独立性检验
# from scipy.stats import chi2_contingency
# g, p, dof, expected = chi2_contingency(education_income)
# '''
# g: z值
# p: 概率值
# dof: *度
# expected: 期望值
# '''
# from scipy.stats import chi2
# import numpy as np
# x = np.linspace(chi2.ppf(0.01, dof), chi2.ppf(0.99, dof), 100)
# plt.figure()
# plt.plot(x,chi2.pdf(x,dof))
#
# # 以95%置信区间，查看小概率事件区间
# plt.axvline(chi2.ppf(0.975, dof), color='r')
# plt.axvline(chi2.ppf(0.025, dof), color='r')
# plt.title('chi2 distribution'+' whose dof is '+str(dof),size=20)
# plt.text(chi2.ppf(0.975, dof), 0.02, 'q=0.975,z='+str(round(chi2.ppf(0.975, dof), 2)), ha='right', va='top', color='g', alpha=0.8, size=15)
# plt.text(chi2.ppf(0.025, dof), 0.02, 'q=0.025,z='+str(round(chi2.ppf(0.025, dof), 2)), ha='left', va='top', color='g', alpha=0.8, size=15)
# plt.xlabel('g='+str(round(g,2))+', '+'p='+str(round(p,2)), color='orange',size=15)
# # plt.savefig("E_and_Income_chi2_distribution.png")
#
#
#
# # --------------对marital_status的处理----------------
# marital_status_income_less = adult_train['marital-status'][adult_train['income'] == ' <=50K'].value_counts()
# marital_status_income_more = adult_train['marital-status'][adult_train['income'] == ' >50K'].value_counts()
# marital_status_income = pd.concat([marital_status_income_less, marital_status_income_more], axis=1, sort=True)
# marital_status_income.columns = ['less than 50K', 'more than 50K']
# marital_status_income.fillna(0, inplace=True)
# marital_status_income.plot(kind='bar', figsize=(10, 6))
# plt.xticks(rotation=45, size=6)
# plt.title('Salery about Marital_status', size=20)
# # plt.savefig("Salery_about_Marital_status.png")
#
# # 独立性检验
# from scipy.stats import chi2_contingency
# g, p, dof, expected = chi2_contingency(marital_status_income)
# '''
# g: z值
# p: 概率值
# dof: *度
# expected: 期望值
# '''
# from scipy.stats import chi2
# import numpy as np
# x = np.linspace(chi2.ppf(0.01, dof), chi2.ppf(0.99, dof), 100)
# plt.figure()
# plt.plot(x,chi2.pdf(x,dof))
#
# # 以95%置信区间，查看小概率事件区间
# plt.axvline(chi2.ppf(0.975, dof), color='r')
# plt.axvline(chi2.ppf(0.025, dof), color='r')
# plt.title('chi2 distribution'+' whose dof is '+str(dof),size=20)
# plt.text(chi2.ppf(0.975, dof), 0.02, 'q=0.975,z='+str(round(chi2.ppf(0.975, dof), 2)), ha='right', va='top', color='g', alpha=0.8, size=15)
# plt.text(chi2.ppf(0.025, dof), 0.02, 'q=0.025,z='+str(round(chi2.ppf(0.025, dof), 2)), ha='left', va='top', color='g', alpha=0.8, size=15)
# plt.xlabel('g='+str(round(g,2))+', '+'p='+str(round(p,2)), color='orange',size=15)
# plt.savefig("M_and_Income_chi2_distribution.png")
#
# # --------------对occupation的处理----------------
# occupation_income_less = adult_train['occupation'][adult_train['income'] == ' <=50K'].value_counts()
# occupation_income_more = adult_train['occupation'][adult_train['income'] == ' >50K'].value_counts()
# occupation_income = pd.concat([occupation_income_less, occupation_income_more], axis=1, sort=True)
# occupation_income.columns = ['less than 50K', 'more than 50K']
# occupation_income.fillna(0, inplace=True)
# occupation_income.plot(kind='bar', figsize=(10, 6))
# plt.xticks(rotation=45, size=6)
# plt.title('Salery about Occupation', size=20)
# plt.savefig("Salery_about_Occupation.png")
#
# # 独立性检验
# from scipy.stats import chi2_contingency
# g, p, dof, expected = chi2_contingency(occupation_income)
# '''
# g: z值
# p: 概率值
# dof: *度
# expected: 期望值
# '''
# from scipy.stats import chi2
# import numpy as np
# x = np.linspace(chi2.ppf(0.01, dof), chi2.ppf(0.99, dof), 100)
# plt.figure()
# plt.plot(x,chi2.pdf(x,dof))
#
# # 以95%置信区间，查看小概率事件区间
# plt.axvline(chi2.ppf(0.975, dof), color='r')
# plt.axvline(chi2.ppf(0.025, dof), color='r')
# plt.title('chi2 distribution'+' whose dof is '+str(dof),size=20)
# plt.text(chi2.ppf(0.975, dof), 0.02, 'q=0.975,z='+str(round(chi2.ppf(0.975, dof), 2)), ha='right', va='top', color='g', alpha=0.8, size=15)
# plt.text(chi2.ppf(0.025, dof), 0.02, 'q=0.025,z='+str(round(chi2.ppf(0.025, dof), 2)), ha='left', va='top', color='g', alpha=0.8, size=15)
# plt.xlabel('g='+str(round(g,2))+', '+'p='+str(round(p,2)), color='orange',size=15)
# plt.savefig("O_and_Income_chi2_distribution.png")
#
# # --------------对relationship的处理----------------
# relationship_income_less = adult_train['relationship'][adult_train['income'] == ' <=50K'].value_counts()
# relationship_income_more = adult_train['relationship'][adult_train['income'] == ' >50K'].value_counts()
# relationship_income = pd.concat([relationship_income_less, relationship_income_more], axis=1, sort=True)
# relationship_income.columns = ['less than 50K', 'more than 50K']
# relationship_income.fillna(0, inplace=True)
# relationship_income.plot(kind='bar', figsize=(10, 6)) # 设置图片大小
# plt.xticks(rotation=45, size=6)
# plt.title('Salery about Relationship', size=20)
# plt.savefig("Salery_about_Relationship.png")
#
# # 独立性检验
# from scipy.stats import chi2_contingency
# g, p, dof, expected = chi2_contingency(relationship_income)
# '''
# g: z值
# p: 概率值
# dof: *度
# expected: 期望值
# '''
# from scipy.stats import chi2
# import numpy as np
# x = np.linspace(chi2.ppf(0.01, dof), chi2.ppf(0.99, dof), 100)
# plt.figure()
# plt.plot(x,chi2.pdf(x,dof))
#
# # 以95%置信区间，查看小概率事件区间
# plt.axvline(chi2.ppf(0.975, dof), color='r')
# plt.axvline(chi2.ppf(0.025, dof), color='r')
# plt.title('chi2 distribution'+' whose dof is '+str(dof),size=20)
# plt.text(chi2.ppf(0.975, dof), 0.02, 'q=0.975,z='+str(round(chi2.ppf(0.975, dof), 2)), ha='right', va='top', color='g', alpha=0.8, size=15)
# plt.text(chi2.ppf(0.025, dof), 0.02, 'q=0.025,z='+str(round(chi2.ppf(0.025, dof), 2)), ha='left', va='top', color='g', alpha=0.8, size=15)
# plt.xlabel('g='+str(round(g,2))+', '+'p='+str(round(p,2)), color='orange',size=15)
# plt.savefig("R_and_Income_chi2_distribution.png")
#
# # --------------对race的处理----------------
# race_income_less = adult_train['race'][adult_train['income'] == ' <=50K'].value_counts()
# race_income_more = adult_train['race'][adult_train['income'] == ' >50K'].value_counts()
# race_income = pd.concat([race_income_less, race_income_more], axis=1, sort=True)
# race_income.columns = ['less than 50K', 'more than 50K']
# race_income.fillna(0, inplace=True)
# race_income.plot(kind='bar', figsize=(10, 6))
# plt.xticks(rotation=45, size=6)
# plt.title('Salery about race', size=20)
# # plt.savefig("Salery_about_Race.png")
#
# # 独立性检验
# from scipy.stats import chi2_contingency
# g, p, dof, expected = chi2_contingency(race_income)
# '''
# g: z值
# p: 概率值
# dof: *度
# expected: 期望值
# '''
# from scipy.stats import chi2
# import numpy as np
# x = np.linspace(chi2.ppf(0.01, dof), chi2.ppf(0.99, dof), 100)
# plt.figure()
# plt.plot(x,chi2.pdf(x,dof))
#
# # 以95%置信区间，查看小概率事件区间
# plt.axvline(chi2.ppf(0.975, dof), color='r')
# plt.axvline(chi2.ppf(0.025, dof), color='r')
# plt.title('chi2 distribution'+' whose dof is '+str(dof),size=20)
# plt.text(chi2.ppf(0.975, dof), 0.02, 'q=0.975,z='+str(round(chi2.ppf(0.975, dof), 2)), ha='right', va='top', color='g', alpha=0.8, size=15)
# plt.text(chi2.ppf(0.025, dof), 0.02, 'q=0.025,z='+str(round(chi2.ppf(0.025, dof), 2)), ha='left', va='top', color='g', alpha=0.8, size=15)
# plt.xlabel('g='+str(round(g,2))+', '+'p='+str(round(p,2)), color='orange',size=15)
# plt.savefig("Ra_and_Income_chi2_distribution.png")
#
# # --------------对sex的处理----------------
# sex_income_less = adult_train['sex'][adult_train['income'] == ' <=50K'].value_counts()
# sex_income_more = adult_train['sex'][adult_train['income'] == ' >50K'].value_counts()
# sex_income = pd.concat([sex_income_less, sex_income_more], axis=1, sort=True)
# sex_income.columns = ['less than 50K', 'more than 50K']
# sex_income.fillna(0, inplace=True)
# sex_income.plot(kind='bar', figsize=(10, 6))
# plt.xticks(rotation=45, size=6)
# plt.title('Salery about sex', size=20)
# plt.savefig("Salery_about_Sex.png")
#
# # 独立性检验
# from scipy.stats import chi2_contingency
# g, p, dof, expected = chi2_contingency(sex_income)
# '''
# g: z值
# p: 概率值
# dof: *度
# expected: 期望值
# '''
# from scipy.stats import chi2
# import numpy as np
# x = np.linspace(chi2.ppf(0.01, dof), chi2.ppf(0.99, dof), 100)
# plt.figure()
# plt.plot(x,chi2.pdf(x,dof))
#
# # 以95%置信区间，查看小概率事件区间
# plt.axvline(chi2.ppf(0.975, dof), color='r')
# plt.axvline(chi2.ppf(0.025, dof), color='r')
# plt.title('chi2 distribution'+' whose dof is '+str(dof),size=20)
# plt.text(chi2.ppf(0.975, dof), 0.02, 'q=0.975,z='+str(round(chi2.ppf(0.975, dof), 2)), ha='right', va='top', color='g', alpha=0.8, size=15)
# plt.text(chi2.ppf(0.025, dof), 0.02, 'q=0.025,z='+str(round(chi2.ppf(0.025, dof), 2)), ha='left', va='top', color='g', alpha=0.8, size=15)
# plt.xlabel('g='+str(round(g,2))+', '+'p='+str(round(p,2)), color='orange',size=15)
# plt.savefig("S_and_Income_chi2_distribution.png")
#
#
# # 对native_country进行查看数据，看看国家与工资的关系
# native_country_income_less = adult_train['native-country'][adult_train['income'] == ' <=50K'].value_counts()
# native_country_income_more = adult_train['native-country'][adult_train['income'] == ' >50K'].value_counts()
# native_country_income = pd.concat([native_country_income_less, native_country_income_more], axis=1, sort=True)
# native_country_income.columns = ['less than 50K', 'more than 50K']
# native_country_income.fillna(0,inplace=True)
# print(native_country_income)
# # 独立性检验
# from scipy.stats import chi2_contingency
# g, p, dof, expected = chi2_contingency(native_country_income)
# '''
# g: z值
# p: 概率值
# dof: *度
# expected: 期望值
# '''
# from scipy.stats import chi2
# import numpy as np
# x = np.linspace(chi2.ppf(0.01, dof), chi2.ppf(0.99, dof), 100)
# plt.figure()
# plt.plot(x,chi2.pdf(x,dof))
#
# # 以95%置信区间，查看小概率事件区间
# plt.axvline(chi2.ppf(0.975, dof), color='r')
# plt.axvline(chi2.ppf(0.025, dof), color='r')
# plt.title('chi2 distribution'+' whose dof is '+str(dof),size=20)
# plt.text(chi2.ppf(0.975, dof), 0.02, 'q=0.975,z='+str(round(chi2.ppf(0.975, dof), 2)), ha='right', va='top', color='g', alpha=0.8, size=15)
# plt.text(chi2.ppf(0.025, dof), 0.02, 'q=0.025,z='+str(round(chi2.ppf(0.025, dof), 2)), ha='left', va='top', color='g', alpha=0.8, size=15)
# plt.xlabel('g='+str(round(g,2))+', '+'p='+str(round(p,2)), color='orange',size=15)
# plt.savefig("NC_and_Income_chi2_distribution.png")
#
# # --------------对Age的处理，数据进行离散化----------------
adult_train['age_set'] = pd.cut(adult_train['age'], bins=4, labels=['Teenager', 'young man', 'elder', 'old man'])
# # 离散数据绘图
# age_set_income_less = adult_train['age_set'][adult_train['income'] == ' <=50K'].value_counts()
# age_set_income_more = adult_train['age_set'][adult_train['income'] == ' >50K'].value_counts()
# age_set_income = pd.concat([age_set_income_less, age_set_income_more], axis=1, sort=True)
# age_set_income.columns = ['less than 50K', 'more than 50K']
# age_set_income.fillna(0, inplace=True)
# age_set_income.plot(kind='bar', figsize=(10, 6))
# plt.xticks(rotation=45)
# plt.title('Salery about Age Set', size=20)
# plt.savefig("Salery_about_Age_Set.png")
#
# # 绘制线性图
# plt.figure()
# adult_train['age'][adult_train['income'] == ' <=50K'].plot(kind='kde', figsize=(10, 6)) # 分布图
# adult_train['age'][adult_train['income'] == ' >50K'].plot(kind='kde')
# adult_train['age'].plot(kind='kde')
# plt.xlabel("Age")
# plt.ylabel("Density")
# plt.title("Age about higher_salery")
# plt.legend(('<=50K', '>50K','all age'), loc='best')
# plt.savefig("Age_kernel_density_estimation.png")
#
# # 绘制正态拟合曲线
# M_S = stats.norm.fit(adult_train['age']) # 正态拟合的平均值与标准差
# plt.figure()
# adult_train['age'].plot(kind='kde') # 原本的概率密度分布图
#
# normalDistribution = stats.norm(M_S[0], M_S[1]) # 绘制拟合的正态分布图
# x = np.linspace(normalDistribution.ppf(0.01), normalDistribution.ppf(0.99), 100)
# plt.plot(x, normalDistribution.pdf(x), c='orange')
# plt.xlabel('Age about Adult '+'mean='+str(round(M_S[0], 5))+',std='+str(round(M_S[1], 5)))
# plt.title('Age_NormalDistibution_Origin', size=20)
# plt.legend(['Origin', 'NormDistribution'])
# plt.savefig("Age_NormalDistibution_Origin.png")
#
#
# # --------------对education_num的处理，数据进行离散化----------------
# enum_income_less = adult_train['education-num'][adult_train['income'] == ' <=50K'].value_counts()
# enum_income_more = adult_train['education-num'][adult_train['income'] == ' >50K'].value_counts()
# enum_income = pd.concat([enum_income_less, enum_income_more], axis=1, sort=True)
# enum_income.columns = ['less than 50K', 'more than 50K']
# enum_income.fillna(0, inplace=True)
# enum_income.plot(kind='bar', figsize=(10, 6))
# plt.xticks(rotation=0)
# plt.title('Salery about e_num', size=20)
# # plt.savefig("Salery_about_e_num.png")
#
# # 独立性检验
# from scipy.stats import chi2_contingency
# g, p, dof, expected = chi2_contingency(enum_income)
# '''
# g: z值
# p: 概率值
# dof: *度
# expected: 期望值
# '''
# from scipy.stats import chi2
# import numpy as np
# x = np.linspace(chi2.ppf(0.01, dof), chi2.ppf(0.99, dof), 100)
# plt.figure()
# plt.plot(x,chi2.pdf(x,dof))
#
# # 以95%置信区间，查看小概率事件区间
# plt.axvline(chi2.ppf(0.975, dof), color='r')
# plt.axvline(chi2.ppf(0.025, dof), color='r')
# plt.title('chi2 distribution'+' whose dof is '+str(dof),size=20)
# plt.text(chi2.ppf(0.975, dof), 0.02, 'q=0.975,z='+str(round(chi2.ppf(0.975, dof), 2)), ha='right', va='top', color='g', alpha=0.8, size=15)
# plt.text(chi2.ppf(0.025, dof), 0.02, 'q=0.025,z='+str(round(chi2.ppf(0.025, dof), 2)), ha='left', va='top', color='g', alpha=0.8, size=15)
# plt.xlabel('g='+str(round(g,2))+', '+'p='+str(round(p,2)), color='orange',size=15)
# plt.savefig("EN_and_Income_chi2_distribution.png")
#
# # --------------对hours-per-week的处理，数据进行离散化----------------
# adult_train['hours_set'] = pd.cut(adult_train['hours-per-week'], bins=4, labels=['too free', 'few', 'common', 'too busy'])
# # 离散数据绘图
# hours_income_less = adult_train['hours_set'][adult_train['income'] == ' <=50K'].value_counts()
# hours_income_more = adult_train['hours_set'][adult_train['income'] == ' >50K'].value_counts()
# hours_income = pd.concat([hours_income_less, hours_income_more], axis=1, sort=True)
# hours_income.columns = ['less than 50K', 'more than 50K']
# print(hours_income)
# hours_income.fillna(0, inplace=True)
# hours_income.plot(kind='bar', figsize=(10, 6))
# plt.xticks(rotation=0)
# plt.title('Salery about hours set', size=20)
# # plt.savefig("Salery_about_hours_set.png")
#
# # 绘制线性图
# plt.figure()
# adult_train['hours-per-week'][adult_train['income'] == ' <=50K'].plot(kind='kde', figsize=(10, 6)) # 分布图
# adult_train['hours-per-week'][adult_train['income'] == ' >50K'].plot(kind='kde')
# adult_train['hours-per-week'].plot(kind='kde')
# plt.xlabel("hours-per-week")
# plt.ylabel("Density")
# plt.title("hours-per-week about higher_salery")
# plt.legend(('<=50K', '>50K','all '), loc='best')
# plt.savefig("hours_per_week_kernel_density_estimation.png")
#
#
# # --------------对capital-gain的处理----------------
# # 绘制线性图
# plt.figure()
# adult_train['capital-gain'][adult_train['income'] == ' <=50K'].plot(kind='kde', figsize=(10, 6)) # 分布图
# adult_train['capital-gain'][adult_train['income'] == ' >50K'].plot(kind='kde')
# adult_train['capital-gain'].plot(kind='kde')
# plt.xlabel("capital-gain")
# plt.ylabel("Density")
# plt.title("capital-gain about higher_salery")
# plt.legend(('<=50K', '>50K','all '), loc='best')
# plt.savefig("capital_gain_kernel_density_estimation.png")
#
# # --------------对capital-loss的处理----------------
# # 绘制线性图
# plt.figure()
# adult_train['capital-loss'][adult_train['income'] == ' <=50K'].plot(kind='kde', figsize=(10, 6)) # 分布图
# adult_train['capital-loss'][adult_train['income'] == ' >50K'].plot(kind='kde')
# adult_train['capital-loss'].plot(kind='kde')
# plt.xlabel("capital-loss")
# plt.ylabel("Density")
# plt.title("capital-loss about higher_salery")
# plt.legend(('<=50K', '>50K','all '), loc='best')
# plt.savefig("capital_loss_kernel_density_estimation.png")
#
# # 查看capital-gain与capital-loss数据
# # print(adult_train[['capital-gain','capital-loss']].head(10))
# gain_loss = adult_train.groupby(['capital-gain','capital-loss'])
# print(gain_loss.size().head())
#
# # --------------对fnlwgt的处理----------------
# # 绘制线性图
# plt.figure()
# adult_train['fnlwgt'][adult_train['income'] == ' <=50K'].plot(kind='kde', figsize=(10, 6)) # 分布图
# adult_train['fnlwgt'][adult_train['income'] == ' >50K'].plot(kind='kde')
# adult_train['fnlwgt'].plot(kind='kde')
# plt.xlabel("fnlwgt")
# plt.ylabel("Density")
# plt.title("fnlwgt about higher_salery")
# plt.legend(('<=50K', '>50K','all '), loc='best')
# plt.savefig("fnlwgt_kernel_density_estimation.png") # -------------------------------------------数据处理-------------------------------------------
# 删除不符合条件的列
adult_train_good = adult_train.drop(['fnlwgt','hours-per-week','capital-gain','capital-loss'],axis=1)
print(adult_train_good.columns) # 查看每一列的缺失率
print(adult_train_good.isnull().sum()/adult_train_good.shape[0])
#
# # -------------异常值处理-------------
# # 3σ原则检测异常值
# # 定义3σ法则识别异常值函数
# def outRange(Ser1):
# '''
# Ser1：表示传入DataFrame的某一列。
# '''
# boolInd = (Ser1.mean()-3*Ser1.std() > Ser1) | (Ser1.mean()+3*Ser1.std() < Ser1)
# index = np.arange(Ser1.shape[0])[boolInd] # range to array
# outrange = Ser1.iloc[index]
# return outrange
#
# print(outRange(adult_train_good['age'])) # # 提取出训练集
X_train = adult_train_good.drop(['income','age'], axis=1)
Y_train = adult_train_good['income'] X_train = pd.get_dummies(X_train, prefix_sep=':', columns=['workclass', 'education', 'education-num',
'marital-status', 'occupation','race',
'relationship', 'sex', 'native-country'
,'age_set'], dummy_na=True) print(X_train.head())
Y_train = pd.get_dummies(Y_train, drop_first=True).iloc[:,0] # 取一列
print(Y_train)
# 哑变量处理
# 把空白值也当作变量处理 # 数据集划分
from sklearn.model_selection import train_test_split X = X_train
y = Y_train X_train, X_test, y_train, y_test = train_test_split(X_train,Y_train, test_size=0.2, random_state=12345) # 标准化
from sklearn.preprocessing import StandardScaler
Standard = StandardScaler().fit(X_train) # 训练产生标准化的规则,因为数据集分为训练与测试，测试相当于后来的。 Xtrain = Standard.transform(X_train) # 将规则应用于训练集
Xtest = Standard.transform(X_test) # 将规则应用于测试集 # 进行分类算法
from sklearn.neighbors import KNeighborsClassifier
clf = KNeighborsClassifier().fit(X_train, y_train)
y_pred = clf.predict(Xtest) # 判定分类算法
from sklearn.metrics import classification_report, auc
print(classification_report(y_test, y_pred)) # 绘制roc曲线
from sklearn.metrics import roc_curve
import matplotlib.pyplot as plt
plt.rcParams['font.sans-serif'] = 'SimHei' # 改字体
# 求出ROC曲线的x轴和Y轴
fpr, tpr, thresholds = roc_curve(y_test, y_pred)
print(auc(fpr, tpr))
plt.figure(figsize=(10, 6))
plt.xlim(0, 1) # 设定x轴的范围
plt.ylim(0.0, 1.1) # 设定y轴的范围
plt.xlabel('假正率')
plt.ylabel('真正率')
plt.plot(fpr, tpr, linewidth=2, linestyle="-", color='red')
plt.title('Line Roc of X_train by KNeighborsClassifier()', size=20)
plt.show() print(type(Standard.transform(X)))
print(type(y))
print(Standard.transform(X).shape)
print(y.shape) #
# #交叉验证
# from sklearn.cross_validation import cross_val_score
# k_score=[]
X = Standard.transform(X)
# for i in range(1,3):
# knn = KNeighborsClassifier(n_neighbors=i)
# scores = cross_val_score(knn, X, y, scoring='accuracy',cv=5)
# k_score.append(scores.mean())
# print(k_score) # 查看学习曲线
from sklearn.learning_curve import learning_curve
train_sizes, train_loss, test_loss = learning_curve(clf,X,y,cv=10,scoring='mean_squared_error',train_sizes=[0.1,0.25,0.5,0.75,1])
train_loss_mean = -np.mean(train_loss,axis=1)
test_loss_mean = -np.mean(test_loss,axis=1)
plt.plot(train_sizes,train_loss_mean,'o-',color='r', label='Training')
plt.plot(train_sizes,test_loss_mean,'o-',color='g', label='Cross_validation')
plt.legend(loc='best')
plt.show()