时间序列(time series)是一系列有序的数据.通常是等时间间隔的采样数据.如果不是等间隔,则一般会标注每个数据点的时间刻度. time series data mining 主要包括decompose(分析数据的各个成分,例如趋势,周期性),prediction(预测未来的值),classification(对有序数据序列的feature提取与分类),clustering(相似数列聚类)等. 这篇文章主要讨论prediction(forecast,预测)问题. 即已知历史的数据,如何准确
Quandl R Package 通过Quandl API可以快速准确地获取宏观经济数据.(https://www.quandl.com/docs/api) 分享两个国外的优秀网站 R和Python在线免费学习的网站>超赞 高频数据与算法学习 This is Quandl's R package. The Quandl R package uses the Quandl API. The official Quandl R package manual can be found here. Li
I want to consider an approach of forecasting I really like and frequently use. It allows to include the promo campaigns (or another activities and other variables as well) effect into the prediction of total amount. I will use a fictitious example a
In this post I will run SAS example Logistic Regression Random-Effects Model in four R based solutions; Jags, STAN, MCMCpack and LaplacesDemon. To quote the SAS manual: 'The data are taken from Crowder (1978). The Seeds data set is a 2 x 2 factorial
同事反馈他在一测试服务器(CentOS Linux release 7.2.1511)上修改了/etc/profile文件后,使用source命令不能生效,让我帮忙看看,结果使用SecureCRT一登录就发现下面错误信息: Last login: Fri Nov 4 00:42:45 2016 from 10.20.34.14 -bash: $'\r': command not found -bash: $'\r': command not found -bash: $'\r': c