參考:http://scikit-learn.org/stable/modules/clustering.html 在实际项目中,我们真的非常少用到那些简单的模型,比方LR.kNN.NB等.尽管经典,但在project中确实不有用. 今天我们不关注详细的模型,而关注无监督的聚类方法. 之所以关注无监督聚类方法.是由于.在实际项目中,我们除了使用PCA等方法降维外.有时候我们也会考虑使用聚类的方法降维特征. Overview of clustering methods: A comparison…

參考:http://scikit-learn.org/stable/modules/label_propagation.html The semi-supervised estimators insklearn.semi_supervised are able to make use of this additional unlabeled data to better capture the shape of the underlying data distribution and gener…

scikit learn 模块 调参 pipeline+girdsearch 数据举例:文档分类数据集 fetch_20newsgroups #-*- coding: UTF-8 -*- import numpy as np from sklearn.pipeline import Pipeline from sklearn.linear_model import SGDClassifier from sklearn.grid_search import GridSearchCV from sk…

一.Scikit Learn中使用estimator三部曲 1. 构造estimator 2. 训练模型:fit 3. 利用模型进行预测:predict 二.模型评价 模型训练好后,度量模型拟合效果的常见准则有: 1.      均方误差(mean squared error,MSE): 2.      平均绝对误差(mean absolute error,MAE) 3.      R2 score:scikit learn线性回归模型的缺省评价准则,既考虑了预测值与真值之间的差异,也考虑了问题…

目录 5.3 使用LogisticRegressionCV进行正则化的 Logistic Regression 参数调优 一.Scikit Learn中有关logistics回归函数的介绍 1. 交叉验证 交叉验证用于评估模型性能和进行参数调优(模型选择).分类任务中交叉验证缺省是采用StratifiedKFold. sklearn.cross_validation.cross_val_score(estimator, X, y=None, scoring=None, cv=None, n_jo…

转自:http://my.oschina.net/u/175377/blog/84420#OSC_h2_23 Scikit Learn: 在python中机器学习 Warning 警告:有些没能理解的句子,我以自己的理解意译. 翻译自:Scikit Learn:Machine Learning in Python 作者: Fabian Pedregosa, Gael Varoquaux 先决条件 Numpy, Scipy IPython matplotlib scikit-learn 目录 载入…

Scikit Learn Scikit-Learn简称sklearn,基于 Python 语言的,简单高效的数据挖掘和数据分析工具,建立在 NumPy,SciPy 和 matplotlib 上.…

Before you read  This is a demo or practice about how to use Simple-Linear-Regression in scikit-learn with python. Following is the package version that I use below: The Python version: 3.6.2 The Numpy version: 1.8.0rc1 The Scikit-Learn version: 0.19…

官方网站链接 sklearn.neighbors.KNeighborsClassifier sklearn.tree.DecisionTreeClassifier sklearn.naive_bayes.MultinomialNB sklearn.linear_model.LogisticRegression sklearn.svm.SVC   Home Installation Documentation Scikit-learn 0.20.2 (stable) Tutorials User…

答案在这里:http://www.tuicool.com/articles/U3uiiu http://scikit-learn.org/stable/modules/feature_extraction.html#text-feature-extraction…