sklearn.feature_selection (https://scikit-learn.org/stable/modules/classes.html%23module-sklearn.feature_selection)模块中的类可以用于样本集中的特征选择/维数降低,以提高估计器的准确度分数或提高其在非常高维数据集上的性能 互信息和最大信息系数 ...
特征选择(feature selection)是查找和选择数据集中最有用特征的过程,是机器学习流程中的一大关键步骤。不必要的特征会降低训练速度、降低模型可解释性,并且最重要的是还会降低其在测试集上的泛化表现。 目前存在一些专用型的特征选择方法,我常常要一遍又一遍地将它们应用于机器学习问题,这实在让人心累。所以我用Python构...
python3 学习api的使用 git: https:///linyi0604/MachineLearning 代码: from sklearn.datasets import ... 机器学习之路: python 线性回归LinearRegression, 随机参数回归SGDRegressor 预测波士顿房价 python3学习使用api 线性回归,和 随机参数回归 git: https:///linyi0604/MachineLearning from sklearn....
Learn how to use Scikit-Learn library in Python to perform feature selection with SelectKBest, random forest algorithm and recursive feature elimination (RFE).
代码: 1importpandas as pd2fromsklearn.cross_validationimporttrain_test_split3fromsklearn.feature_extractionimportDictVectorizer4fromsklearn.treeimportDecisionTreeClassifier5fromsklearnimportfeature_selection6fromsklearn.cross_validationimportcross_val_score7importnumpy as np8importpylab as pl910'''11特征提取...
在机器学习的二分类问题中,WOE(Weight of Evidence)和Information Value的用来对输入变量进行编码及预测能力评估。安利一下自己写的用来计算这两个值的python工具,目前没有发现python有现成的工具,就自己写了一个。 GitHub地址:GitHub - patrick201/information_value 这两个公式的原始出处没有找到,但现在公开资料解释已...
Embedding 方法：这一类方法的话，就是把feature selection这种思想在算法里built-in了，并不单独拎出来。
Python miguelmoralh/feature-selection-benchmark Star3 Code Issues Pull requests Comprehensive benchmark study of feature selection techniques for predictive machine learning models on tabular data. Various feature selection methods are evaluated across different data characteristics and predictive scenarios. ...
Python implementations of the Boruta R package. This implementation tries to mimic the scikit-learn interface, so use fit, transform or fit_transform, to run the feature selection. For more, see the docs of these functions, and the examples below. ...
Enable virtual space On When set, inserts spaces at the end of each line of code. Select this option to position comments at a consistent point next to your code. The Virtual Space mode is enabled in Column Selection mode. When Virtual Space mode isn't enabled, the insertion point moves ...