Programming

Migrate to blogdown

Finally I have migrated both of my personal and technical blogs from jekyll to blogdown. This will be the first step of my plan to re-organizing my whole writing system.1 There are already many comprehensive articles on how to set up a blogdown site, so I don’t plan to draft an extra step by step tutorial. This post just records the main steps I’ve done in my blog migration, along with some other thoughts during this procedure.

简单测一下dplyr

R 语言处理数据的一大优势就是它自身有非常多方便的函数可以对 data.frame 进行各种变换。 这其中 Hadley 的 plyr 包可谓一大神器。很多时候一个 ddply 函数

Ubuntu 12.04 升级手记

我之前一直用的是ubuntu 10.04的长期支持版本,前段时间更新管理器提示可以升级到12.04的下一个LTS。虽然想到