Lambda Cognition

「Where innovation never stops.」

14 Must-Read Books For Behavior Data Scientists

In my Ph.D career, human behavior (especially mobility) analysis from telecommunication data is my studying theme. I learned a bunch of theories and techniques from other domains when they are of ...

Posted by Xiaming Chen on October 15, 2015

A Tutorial On Topology Correction Of Shapefiles

Abstract: Here is some practical expeirience in cleansing the shapefile using GRASS, which is an open-source platform to do scientific analysis on spatial data. ERIS shapefile is a popular format ...

Posted by Xiaming Chen on August 30, 2015

A Collection of R Pkgs Under Your Pillow

R在统计分析、机器学习、以及绘图上有着丰富的功能，基础安装包里的函数能够满足基本的需求，如果需要更多样化、复杂的数据处理，可以试着使用以下工具: 数据清洗转换 (Data wangling) DescTools (Tools for describing data and descriptive statistics) dplyr (面向data.frame，plyr的下次迭代...

Posted by Xiaming Chen on May 20, 2015

Top Tricks to Make Your Zotero More Powerful

Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share your research sources. It support a wide range of documentation types from papers to presentations, from web pages ...

Posted by Xiaming Chen on January 8, 2015

Understanding Urban Lives with Open Data

Data mining, one of the hottest topics on the media in past years, exhibits a new way to help companies, organizations, and even ordinary people to make plans and decisions in near future. We are c...

Posted by Xiaming Chen on October 23, 2014

Inspiring GIS Projects in R

R is a free software for statistical computing and graphics (as declaimed in its project vision). But in my view, its horizon is beyond that thanking to its flexible extension infrastructure. As a ...

Posted by Xiaming Chen on October 16, 2014