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.

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…

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.