payton数据之旅

2015年4月3日

Customer segmentation – LifeCycle Grids with R（转）

摘要： I want to share a very powerful approach for customer segmentation in this post. It is based on customer’s lifecycle, specifically onfrequencyandrecen... 阅读全文

posted @ 2015-04-03 15:59 payton数据之旅阅读(349) 评论(0) 推荐(0) 编辑

rPithon vs. rPython（转）

摘要： Similar to rPython, the rPithon package (http://rpithon.r-forge.r-project.org) allows users to execute Python code from R and exchange the data betwee... 阅读全文

posted @ 2015-04-03 15:49 payton数据之旅阅读(395) 评论(0) 推荐(0) 编辑

Interactive pivot tables with R（转）

摘要： I love interactivepivot tables. That is the number one reason why I keep using spreadsheet software. The ability to look at data quickly in lots of di... 阅读全文

posted @ 2015-04-03 15:44 payton数据之旅阅读(584) 评论(0) 推荐(0) 编辑

Targeted Learning R Packages for Causal Inference and Machine Learning（转）

摘要： Targeted learning methods build machine-learning-based estimators of parameters defined as features of the probability distribution of the data, while... 阅读全文

posted @ 2015-04-03 15:36 payton数据之旅阅读(468) 评论(0) 推荐(0) 编辑

2015年3月31日

Sampling Distributions and Central Limit Theorem in R（转）

摘要： The Central Limit Theorem (CLT), and the concept of the sampling distribution, are critical for understanding why statistical inference works. There a... 阅读全文

posted @ 2015-03-31 11:27 payton数据之旅阅读(407) 评论(0) 推荐(0) 编辑

2015年3月27日

Introducing: Machine Learning in R（转）

摘要： Machine learning is a branch in computer science that studies the design of algorithms that can learn. Typical machine learning tasks are concept lear... 阅读全文

posted @ 2015-03-27 09:43 payton数据之旅阅读(565) 评论(0) 推荐(0) 编辑

2015年3月26日

A function to help graphical model checks of lm and ANOVA（转）

摘要： As always a more colourful version of this post is available onrpubs.Even if LM are very simple models at the basis of many more complex ones, LM stil... 阅读全文

posted @ 2015-03-26 14:34 payton数据之旅阅读(246) 评论(0) 推荐(0) 编辑

2015年3月25日

Hash Table Performance in R: Part I（转）

摘要： What Is It?A hash table, or associative array, is awell known key-value data structure. In R there is no equivalent, but you do have some options. You... 阅读全文

posted @ 2015-03-25 09:38 payton数据之旅阅读(230) 评论(0) 推荐(0) 编辑

2015年2月28日

reshape: from long to wide format（转）

摘要： This is to continue on the topic of using themelt/castfunctions inreshapeto convert between long and wide format of data frame. Here is the example I ... 阅读全文

posted @ 2015-02-28 10:00 payton数据之旅阅读(557) 评论(0) 推荐(0) 编辑

2015年2月27日

活动设计的“七宗罪”（转）

摘要：导语活动做不好会伤用户，伤产品。很多人以为活动能让产品收入突飞猛进，很多人以为活动能弥补产品的缺陷。其实活动不是解决方案，只是止痛药。他解决不了根本的问题，只能减少疼痛而已。而有时候，药方子开错了，会让伤口更疼！所以有时候不做活动反而更好！┃七宗罪之一：给太多奖励给少了，玩家会骂你抠门。奖励给多了，... 阅读全文

posted @ 2015-02-27 14:59 payton数据之旅阅读(220) 评论(0) 推荐(0) 编辑

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