https://github.com/mattbane/RecommenderSystem http://grouplens.org/datasets/movielens/ KDDCUP-2012官网 From kdnuggets Data repositories AWS (Amazon Web Services) Public Data Sets, provides a centralized repository of public data sets that can be seamle…
/*Author: Jiangong SUN*/ As I've manipulated a lot of data using SQL data reader in recent project. And people says it's not good to access the data by column name. So I've made an performance test in reading data from SQL data reader. Firstly, I've…
由于自己一个项目要用多到Sql与NoSql两种截然不同的数据结构,但在编程上我希望统一接口API,让不同类型的数据库能在相同的编程接口模式下运作.于是找了一个spring的官网,发现一个spring data的项目.Spring Data 统一所有访问数据库的接口,为开发者提供一个更加简便的开发方式 Spring Data 官网 下面是几个核心的项目介绍 Spring Data Commons - 每个Spring Data 项目的核心基础 (因此每一个Spring Data项目都使用统一的接…
问题描述:执行下面的代码,报错valueError: This solver needs samples of at least 2 classes in the data, but the data contains only one class: 0 原因:数据量太少 解决方案:增加训练数据量 代码如下: filename = "test.csv" data = pd.read_csv(filename,sep=' ') data = pd.DataFrame(data) x =…