Monthly Archives:2013年2月

Rugarch的新功能(1.01-5版)

February 27,2013
Rugarch的新功能(1.01-5版)

Since the last release of rugarch on CRAN (ver 1.0-16),在包的开发版本(1.01-5版)中有许多更改和新功能。First,development of the package (and svn) has been moved to google code from r-forge.Second,该包现在的特点是独家使用基于XTS的时间序列

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Fast factor generation with Rcpp

February 27,2013
Fast factor generation with Rcpp

Recall that factors are really just integer vectors with ‘levels',即。,character labels that get mapped to each integer in the vector.我们怎么能采取一个任意的性格,integer,numeric,或者逻辑向量,然后用rcpp强制它成为因子?It's actually quite easy with Rcpp sugar:#include using namespace Rcpp;template IntegerVector fast_factor_template( const Vector& x ) {...

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如何使科学结果消失

February 27,2013
如何使科学结果消失

Nathan Danneman (a co-author and one of my graduate students from Emory) recently sent me a New Yorker article from 2010 金宝搏网址about the"下降效应,"the tendency for initially promising scientific results to get smaller upon replication.Wikipedia can summarize the phenomenon as well as I can: In his article,Lehrer gives several examples where

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Facebook Hacker Cup – Beautiful Strings

February 26,2013

现在Facebook黑客杯即将结束,我想我会发布我的解决方案来应对其中一个挑战。Unfortunately I only made it to Round 1,but I was able to answer this rather interesting Qualification Round problem.The Problem: When John was a little kid he didn't have much to do.There was no...

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湾区新R车间

February 26,2013
湾区新R车间

Practical Data Visualization with R Saturday March 9th,2013 8:30-5:00pm EBay 2161 North 1st Street San Jose,California I will be presenting a one day professional development workshop on modern data visualization with R,sponsored by the ACM San Francisco Bay … Continue reading →

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与R的新方法

February 26,2013

今天,there are two main ways to use Hadoop with R and big data: 1.Use the open-source rmr package to write map-reduce tasks in R (running within the Hadoop cluster - great for data distillation!)2.将数据从Hadoop导入运行Revolution R Enterprise的服务器,通过HBase,ODBC (for high-performance Hadoop/SQL interfaces),or streaming data direct...

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停止标志项目post1:R中完成的一些GIS工作

February 26,2013

(This article was first published on bRogramming,感谢R-Bloggers)为作者留言,188bet appplease follow the link and comment on their blog: bRogramming.188bet appR-bloggers.com offers daily e-mail updates 金宝搏网址about R news and tutorials on topics such as: Data science,Big Data,R jobs,visualization (ggplot2,Boxplots,maps,动画),编程(rstudio,Sweave,LaTeX,SQL,……

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终身工作?罗马主教??

February 26,2013
终身工作?罗马主教??

罗马主教的工作——即the Pope – is considered to be a life-long commitment.我是说,通常是这样。There have been 266 popes since 32 A.D.(according to http://oce.catholic.com/…): almost all popes have served until their death.但这并不意味着他们已经在工作很长时间了…一个人可以很容易地提取…

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使用函数unzip&unz清除日期文件夹

February 26,2013

我是一个有点简约的用户。I feel uncomfortable if something is not in a good order,比如变量和文档的名称,the structures of my codes and projects.I prefer my data stored in .txt or .csv so I can load them to R using read.table or read.csv.For most of the time we...

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空缺时自动通知

February 26,2013

今天,I visited a webpage inadvertently and found several job positions that I am competent with,unfortunately all of them has expired.How many chances we lost in this way?!So I decide to do somthing to limit this kind of loss,and of course using our smart R!The idea is simple: check the job vacancy webpages reguarly,if...

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