JDK is an important tool which consists the base of Java programming as well as supports many other programming IDEs.
This article introduces the installation method of Oracle jdk 8 on Ubuntu 14.04.

This is a learning note for the course Data Analysis in R, the data.table Way.
This course introduces the package ‘data.table’ which is a very powerful tool for data manipulation. I borrow two built-in data frames: mtcars and iris throughout the entire article.

迷你猪降临到这个混乱的世界已经整整一个星期了，白驹就这么过了个隙。

I wanted to try Linux system thus I formatted an old laptop bought 7 years ago (HP Pavilion dm3, French keyboard).
No doubt that I need R and RStudio to be installed on this laptop…

小坏蛋如此迫切地想来到人世，以至于早于预产期4天——12号的晚上，他就开始冲击萝卜的肚子。
临时换了第二天一早的高铁票，赶到产房门口，还没过五分钟，萝卜和娃就被推出来了。
那时真是长吁了一口气，我总算没错过娃出来的那一刻。
然后仿佛眼前落下一负担子一样，肩头一沉。

就这样，三组家庭，多了第七口人，第四个处女座。萝卜，未来的路还长，你要挺住。

For many quantitative analysis, we often consider factors such climate or economics data. Those data are usually displayed as tables on the websites and can be collected from there. However, to copy-paste with EXCEL is an extremely inefficient way.
We can use R to read data directly from the web pages and store them uniformly without too may data clean steps.

Asimov’s Three Laws of Robotics

1. A robot may not injure a human being or,through inaction,allow a human being to come to harm.
2. A robot must obey orders given it by human beings except where such orders would conflict with the First Law.
3. A robot must protect its own existence as long as such protection does not conflict with the First or Second Law.

不知不觉就八月了。七月的最后几天，风雨大作，延续至今。今年，北京的雨格外的多。
草木郁郁葱葱的在这盛夏肆意生长，枝丫穿越斑驳的树皮，渗出一片两片新绿，包围在不那么纯净的空气中，让自己的魂灵努力靠近太阳所能及的范围。地上斑斑点点。这个，叫什么来着，树影婆娑。
静静的看着树叶投出的影子在日光下摇摆，有种白驹过隙的感觉。恍若此生一直在这树荫下度过。

阅读全文 »

现在这个博客基本处于裸奔状态，除了默认的Landscape模板和仅有的两三篇文章以外，其它设置几乎是空白。对于处女座而言简直不能忍。

这是我这个代码菜鸟第一次自己搭建一个博客，感谢Hexo的设计者Tommy Chen给我一个自high的机会。=3=
趁着还没忘，先把搭建过程记录下来(其实Hexo网站上也有…)。