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grep Exclude Example in R

Just finished a Coursera data science course. In one of the assignments, we need to clean up the weather event types. I was struggling with the grep function. For example, I want to find the…

Coursera: R Programming Week 3 Tips

The week 3's assignment is the easiest one. If you can figure out the sample program provided, the solution is very similar to the sample code. You only need to replace a few strings to…

Coursera: R Programming Week 2 Tips

The assignment for week 2 is kinda tough if you have not used R before. The video lectures also did not prepare you for it. If you have not taken the swirl tutorial, I strongly…

Coursera: R Programming Week 1 Tips

After taking The Data Scientist's Toolbox in the Coursera's Data Science Signature Track, R Programming is my second Coursera course. The Data Scientist's Toolbox is very easy, I only spent like a few hours each…

HTA: Check Process Example

Microsoft has a less known technology called HTA (HTML Application). Basically, it gives scripts a GUI front end using HTML notation. I have known HTA for years, but I never get around to try it.…

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PowerShell and Amazon Web Service

I got some experiences with Amazon Web Service when I created my Anime Reviews site. It's pretty neat that you can write a query to look up very detailed product information. Recently, I am thinking…