If you do use AWS (Amazon Web Services) to cloud enable your business, you should be very interested in the security services provided in the AWS Identity and Access Management module. Let’s start with the simple interactive access where you, your administrator, or your developer can sign on to...
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R in the web – with Shiny App
How do you host R application on the internet? One of the available service is from shinyapps.io. This is a hosting service that allows you to deploy your R application to the server, and shared them on your web pages. It was really easy to setup. I used RStudio to develop...
Got Spams?
Do you get spams over the internet? and please I don’t mean the canned meat. We get lots of spams in emails, and if you own a website or a blog, you will most likely be flooded with spams posted as comments or contact forms. It is quite a big task...
How to change iTunes Library Location?
iTunes is a music software innovation that was quite impressive when it was first released back in 2001. It was way ahead of all the competitors and it definitely turns heads with its great user interfaces. It was developed by Bill Kincaid and released by Casady & Greene in...
Got CRC Error?
They really don’t make good hardware anymore, specially hard drive, they seems to be not too reliable nowadays. Here is my story, I have a gigantic external hard drive that is great to store lots of data. I use it for all my data files so that I’m not...
Graphing with R 101
What is R? R is programming language and execution platform for statistical computing and graphics. It is known to be the successor for the S language, which was developed at Bell Laboratory. It focuses on a wide variety of statistical and graphical techniques, including linear and nonlinear modelling, time...
Python via Trinket (2) – Having fun with Spirals
This is part 2 of the Python via Trinket series. Next, let’s do something a bit more complex. Let’s draw some spirals. Creating patterns with spirals are very interesting and relaxing to watch. There are many way to do this, I created 2 reusable functions so the source code...
Python via Trinket (1) – Having fun with shapes !
Have you try Trinket yet? It is an education site that provides lots of interactive education opportunities which I recently stumble over. I find it fascinating to evaluate various online education sites that provide innovative ideas on how to do interactive teaching, both online or in a classroom. The...
Tower of Hanoi – a study of recursive function
The Tower of Hanoi is a classic project assignment that most student of Computer Science would encounter in their academic classes. It is usually used to illustrate the power of recursive logic in a program, of cause that it is also a great puzzle to give some good exercise to...
Math puzzle 1- Allowance for your son
Your son wanted you to give him an allowance of $1.00 a week, but you refused and offer to give him only 50 cents a week. After some debates between you 2, your son (who is pretty smart in math) come up with this proposal: “Tell you what, Mom (or Dad)....