from sklearn.preprocessing import MinMaxScaler #数据预处理标准化MinMaxScaler模型 def test_MinMaxScaler(): X=[[1,5,1,2,10], [2,6,3,2,7], [3,7,5,6,4,], [4,8,7,8,1]] print("before transform:",X) scaler=MinMaxScaler(feature_range=(0,2)) scaler.fit(X) print(&q…

from sklearn.preprocessing import MaxAbsScaler #数据预处理标准化MaxAbsScaler模型 def test_MaxAbsScaler(): X=[[1,5,1,2,10], [2,6,3,2,7], [3,7,5,6,4,], [4,8,7,8,1]] print("before transform:",X) scaler=MaxAbsScaler() scaler.fit(X) print("scale_ is :&quo…

from sklearn.preprocessing import StandardScaler #数据预处理标准化StandardScaler模型 def test_StandardScaler(): X=[[1,5,1,2,10], [2,6,3,2,7], [3,7,5,6,4,], [4,8,7,8,1]] print("before transform:",X) scaler=StandardScaler() scaler.fit(X) print("scale_…

from sklearn.preprocessing import Normalizer #数据预处理正则化Normalizer模型 def test_Normalizer(): X=[[1,2,3,4,5], [5,4,3,2,1], [1,3,5,2,4,], [2,4,1,3,5]] print("before transform:",X) normalizer=Normalizer(norm='l2') print("after transform:",no…

from sklearn.svm import LinearSVC from sklearn.pipeline import Pipeline from sklearn import neighbors, datasets from sklearn.datasets import load_digits from sklearn.linear_model import LogisticRegression from sklearn.model_selection import train_tes…

from sklearn.decomposition import DictionaryLearning #数据预处理字典学习DictionaryLearning模型 def test_DictionaryLearning(): X=[[1,2,3,4,5], [6,7,8,9,10], [10,9,8,7,6,], [5,4,3,2,1]] print("before transform:",X) dct=DictionaryLearning(n_components=3) dct.…

from sklearn.feature_selection import SelectPercentile,f_classif #数据预处理过滤式特征选取SelectPercentile模型 def test_SelectKBest(): X=[[1,2,3,4,5], [5,4,3,2,1], [3,3,3,3,3,], [1,1,1,1,1]] y=[0,1,0,1] print("before transform:",X) selector=SelectPercentile(s…

from sklearn.feature_selection import VarianceThreshold #数据预处理过滤式特征选取VarianceThreshold模型 def test_VarianceThreshold(): X=[[100,1,2,3], [100,4,5,6], [100,7,8,9], [101,11,12,13]] selector=VarianceThreshold(1) selector.fit(X) print("Variances is %s"…

from sklearn.preprocessing import OneHotEncoder #数据预处理二元化OneHotEncoder模型 def test_OneHotEncoder(): X=[[1,2,3,4,5], [5,4,3,2,1], [3,3,3,3,3,], [1,1,1,1,1]] print("before transform:",X) encoder=OneHotEncoder(sparse=False) encoder.fit(X) print(&quo…

from sklearn.preprocessing import Binarizer #数据预处理二元化Binarizer模型 def test_Binarizer(): X=[[1,2,3,4,5], [5,4,3,2,1], [3,3,3,3,3,], [1,1,1,1,1]] print("before transform:",X) binarizer=Binarizer(threshold=2.5) print("after transform:",bin…

import numpy as np import matplotlib.pyplot as plt from sklearn.svm import LinearSVC from sklearn.linear_model import Lasso from sklearn.model_selection import train_test_split from sklearn.feature_selection import SelectFromModel from sklearn.datase…

from sklearn.svm import LinearSVC from sklearn.datasets import load_iris from sklearn.feature_selection import RFE,RFECV from sklearn.model_selection import train_test_split #数据预处理包裹式特征选取RFE模型 def test_RFE(): iris=load_iris() X=iris.data y=iris.targe…

# -*- coding: utf-8 -*- import numpy as np import matplotlib.pyplot as plt from sklearn import datasets,decomposition def load_data(): ''' 加载用于降维的数据 ''' # 使用 scikit-learn 自带的 iris 数据集 iris=datasets.load_iris() return iris.data,iris.target #超大规模数据集降维I…

import numpy as np import matplotlib.pyplot as plt from sklearn import cluster from sklearn.metrics import adjusted_rand_score from sklearn.datasets.samples_generator import make_blobs def create_data(centers,num=100,std=0.7): X, labels_true = make_b…

import numpy as np import matplotlib.pyplot as plt from sklearn import mixture from sklearn.metrics import adjusted_rand_score from sklearn.datasets.samples_generator import make_blobs def create_data(centers,num=100,std=0.7): X, labels_true = make_b…

import numpy as np import matplotlib.pyplot as plt from sklearn import datasets, linear_model,svm from sklearn.model_selection import train_test_split def load_data_classfication(): ''' 加载用于分类问题的数据集 ''' # 使用 scikit-learn 自带的 iris 数据集 iris=datasets.lo…

import numpy as np import matplotlib.pyplot as plt from matplotlib import cm from mpl_toolkits.mplot3d import Axes3D from sklearn.model_selection import train_test_split from sklearn import datasets, linear_model,discriminant_analysis def load_data()…

# -*- coding: utf-8 -*- import numpy as np import matplotlib.pyplot as plt from sklearn import datasets,manifold def load_data(): ''' 加载用于降维的数据 ''' # 使用 scikit-learn 自带的 iris 数据集 iris=datasets.load_iris() return iris.data,iris.target #等度量映射Isomap降维模型…

# -*- coding: utf-8 -*- import numpy as np import matplotlib.pyplot as plt from sklearn import datasets,manifold def load_data(): ''' 加载用于降维的数据 ''' # 使用 scikit-learn 自带的 iris 数据集 iris=datasets.load_iris() return iris.data,iris.target #多维缩放降维MDS模型 def…

# -*- coding: utf-8 -*- import numpy as np import matplotlib.pyplot as plt from sklearn import datasets,decomposition def load_data(): ''' 加载用于降维的数据 ''' # 使用 scikit-learn 自带的 iris 数据集 iris=datasets.load_iris() return iris.data,iris.target #核化PCAKerne…

# -*- coding: utf-8 -*- import numpy as np import matplotlib.pyplot as plt from sklearn import datasets,decomposition def load_data(): ''' 加载用于降维的数据 ''' # 使用 scikit-learn 自带的 iris 数据集 iris=datasets.load_iris() return iris.data,iris.target #PCA降维 def…

import numpy as np import matplotlib.pyplot as plt from sklearn import datasets,ensemble from sklearn.model_selection import train_test_split def load_data_regression(): ''' 加载用于回归问题的数据集 ''' #使用 scikit-learn 自带的一个糖尿病病人的数据集 diabetes = datasets.load_di…

import numpy as np import matplotlib.pyplot as plt from sklearn import datasets,ensemble from sklearn.model_selection import train_test_split def load_data_classification(): ''' 加载用于分类问题的数据集 ''' # 使用 scikit-learn 自带的 digits 数据集 digits=datasets.load_d…

import numpy as np import matplotlib.pyplot as plt from sklearn import datasets,ensemble from sklearn.model_selection import train_test_split def load_data_regression(): ''' 加载用于回归问题的数据集 ''' #使用 scikit-learn 自带的一个糖尿病病人的数据集 diabetes = datasets.load_di…

import numpy as np import matplotlib.pyplot as plt from sklearn import datasets,ensemble from sklearn.model_selection import train_test_split def load_data_classification(): ''' 加载用于分类问题的数据集 ''' # 使用 scikit-learn 自带的 digits 数据集 digits=datasets.load_d…

import numpy as np import matplotlib.pyplot as plt from sklearn import datasets,ensemble from sklearn.model_selection import train_test_split def load_data_classification(): ''' 加载用于分类问题的数据集 ''' # 使用 scikit-learn 自带的 digits 数据集 digits=datasets.load_d…

import numpy as np from matplotlib import pyplot as plt from sklearn import neighbors, datasets from matplotlib.colors import ListedColormap from sklearn.neural_network import MLPClassifier ## 加载数据集 np.random.seed(0) # 使用 scikit-learn 自带的 iris 数据集 ir…

import numpy as np from matplotlib import pyplot as plt from mpl_toolkits.mplot3d import Axes3D from sklearn.neural_network import MLPClassifier def creat_data(n): ''' 创建线性可分数据集 :param n: 正例样本的个数(同时也是负例样本的个数) :return: 返回一个线性可分数据集,数据集大小为 2*n ''' np.ra…

# -*- coding: utf-8 -*- import numpy as np import matplotlib.pyplot as plt from sklearn import datasets,manifold def load_data(): ''' 加载用于降维的数据 ''' # 使用 scikit-learn 自带的 iris 数据集 iris=datasets.load_iris() return iris.data,iris.target #局部线性嵌入LLE降维模型 d…

import numpy as np import matplotlib.pyplot as plt from sklearn.svm import LinearSVC from sklearn.datasets import load_digits from sklearn.model_selection import validation_curve #模型选择验证曲线validation_curve模型 def test_validation_curve(): ''' 测试 validat…