Data Types in R

R

Data Types in R take on an interesting twist in contrast to other traditional programming languages like Java and C. In R, the variables are not “declared” with any data type, the variables are assigned some values and the values itself will determine the data type of the variable....

Easy web access log processing with R

R

I recently had a need to diagnose a problem in my web site, so I wanted to do some analysis of the raw access log file.  There are many out-of-the-box analytical utility available but none of them allows me to drill down to the access pattern in more details....

R in the web – with Shiny App

R

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...

Graphing with R 101

R

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...

Google Analytics

What is Google Analytics? Google Analytics is a wonderful tool for anyone who manages website.  There are four main components to the Google Analytics system: Collection: to collect all user interaction data from websites.  This is done via JavaScript code that are injected into the html code.  The “activities”...

Qlikview Development Life Cycle

Qlikview platform provides a complete end-to-end solution consist of data source connectors, desktop development software, and back-end server infrastructure.   A typical development flow starts with identifying a data source, usually a data warehouse, database, or even an excel spreadsheet.  Business analyst will define the use cases for the...

Qlikview Tutorial

Qlikview is one of the easiest and flexible Business Intelligence visualization tool I’ve used for my BI development in the last few years.  It is simple, but have powerful scripting language that allow you to customize it in many ways.  What is also very promising is that Qlik.com continue to...