处理不平衡的数据集的时候,可以使用对数据加权来提高数量较小类的被选中的概率,具体方式如下 fit(self, x, y, batch_size=32, nb_epoch=10, verbose=1, callbacks=[], validation_split=0.0, validation_data=None, shuffle=True, class_weight=None, sample_weight=None) class_weight:字典,将不同的类别映射为不同的权值,该参数用来在训练…

1.Normal distribution In probability theory, the normal (or Gaussian or Gauss or Laplace–Gauss) distribution is a very common continuous probability distribution. Normal distributions are important in statistics and are often used in the natural and…

Spark MLlib提供了一些基本的统计学的算法,下面主要说明一下: 1.Summary statistics 对于RDD[Vector]类型,Spark MLlib提供了colStats的统计方法,该方法返回一个MultivariateStatisticalSummary的实例.他封装了列的最大值,最小值,均值.方差.总数.如下所示: val conf = new SparkConf().setAppName("Simple Application").setMaster(&quo…

data 发送到服务器的数据.将自动转换为请求字符串格式.GET 请求中将附加在 URL 后.查看 processData 选项说明以禁止此自动转换.必须为 Key/Value 格式.如果为数组,jQuery 将自动为不同值对应同一个名称.如 {foo:["bar1", "bar2"]} 转换为 '&foo=bar1&foo=bar2'. 示例: $.ajax({    type: "POST",    url: "so…

Data analysis - Wikipedia https://en.wikipedia.org/wiki/Data_analysis Data analysis is a process of inspecting, cleansing, transforming, and modeling data with the goal of discovering useful information, informing conclusions, and supporting decision…

大数据分析指南 TMF Frameworx最佳实践 Unleashing Business Value in Big Data 前言 此文节选自TMF Big Data Analytics Guidebook. TMF文档版权信息  Copyright © TeleManagement Forum 2013. All Rights Reserved. This document and translations of it may be copied and furnished to other…

Week 1 Data Science: An overview Objective: 1.Is data science the same as statistics or analysis? statistics analysis data science statistical analysis *analyzing the information of a sample. statistical analysis allowed to draw inference about targe…

MAT022 Foundations of Statistics and Data Science Summative Assessment 2019/20MAT022 Foundations of Statistics and Data ScienceSummative Assessment 2019/20Summative assessment for the module is by means of a single report on your statistical analysis…

发现一个比较有意思的网站,http://www.oracle-base.com/articles/11g/articles-11g.php Oracle 11g Articles Oracle Database 11g: New Features For Administrators OCP Exam Articles Oracle Database 11g Release 1: Miscellaneous Articles Oracle Database 11g Release 2: Misc…

Complete list of Microsoft SQL Server trace flags (585 trace flags) REMEMBER: Be extremely careful with trace flags, test in your test environment first. And consult professionals first if you are the slightest uncertain about the effects of your cha…