How is the weather? When I was asked about the question, I usually resort to google Weather + City. I feel winter this year is way warmer vs. LY, but how can I find this year and last year’s winter temperature? …

There are multiple types of statistical tests, but they all share same basic elements, which are random variables, distribution, null/alternative hypothesis and critical value, and concepts that are generated from these elements, e.g., …

You created a tableau dashboard and shared it with the leadership team, sales team, finance team and they came back to told you how they loved your dashboard that shared insights that was not captured before. …

As a data scientist, you draw insights from data and present it in a informative and visually appealing way. There are good tools (Tableau, Looker, Power BI) to help you tell the story, while what if your boss prefers PowerPoint? It is not hard to make PowerPoint, but it takes…

There are 6 types of tableau filters. Understanding operational order of filters can of vital importance. This article is going to briefly explain the 6 types of filters and share 3 examples to differentiate the subtle details of different filters. Extract Filters and Data Source Filters applied on extract or…

In this article, I am going to discuss two ways of deploying the R Shiny App as a desktop app There are two ways of deploying the R Shiny Apps: Web Application Desktop Application Though the first method is convenient, and easy to share, it requires multiple approvals from IT/Finance…

Have you ever run into the following warnings? If yes, you need to compile the R source code to binary (two type of R packages, binary/source). Then you need to have RTools installed. Select your Rtools based on your R version.

Reactivity is one of the most important and confusing concepts of R Shiny Programming. This article is going to explain the definition and different between: Reactive : define reactive expression that is impacted by input Observe : similar with print function, which allow the user to observe what is happening…

As a programmer, data scientist, or anyone who write code sometimes, you should not be unfamiliar with ‘Bugs’. Often, people tried to avoid them as much as possible, however, it is impossible. The best approach would be, to understand what are the typical bugs and tried to avoid them in…