Wenxuan ZhangUnderstanding Cohen’s KappaCohen’s Kappa, or quadratic weighted kappa, is a metric to measure agreement between two ratings.Nov 21, 2023Nov 21, 2023
Wenxuan ZhangGit and Github 101Github is one of the most essential tools for software engineers, data scientists, data analysts, or anyone need version control.Aug 28, 2023Aug 28, 2023
Wenxuan ZhangTime Series Analysis and ARIMA modelTime series is a set of data points indexed in time order. Some typical example are annual s&p 500 index, daily temperature and website…Jul 11, 2023Jul 11, 2023
Wenxuan ZhangOn Unemployment — What happened since pandemic and what will be the job market outlook in 2023?There no short of job cutting news at the end of 2022. According to layoffs.fyi, 1003 companies cut 152,421 jobs. Walls street did not…Dec 25, 2022Dec 25, 2022
Wenxuan ZhangLet’s talk about weather — using rnoaa to access the NOAA weather dataHow 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…Nov 25, 2022Nov 25, 2022
Wenxuan ZhangThe Very Basics of a Statistical TestThere are multiple types of statistical tests, but they all share same basic elements, which are random variables, distribution…Oct 14, 2022Oct 14, 2022
Wenxuan ZhangSpeed Up Your Tableau DashboardYou created a tableau dashboard and shared it with the leadership team, sales team, finance team and they came back to told you how they…Oct 6, 2022Oct 6, 2022
Wenxuan ZhangNo more power point by hand — automate PPT creation by R OfficerAs a data scientist, you draw insights from data and present it in a informative and visually appealing way. There are good tools (Tableau…Sep 16, 2022Sep 16, 2022
Wenxuan ZhangTableau Filters — Operation orders and examplesThere are 6 types of tableau filters. Understanding operational order of filters can of vital importance. This article is going to briefly…Sep 9, 2022Sep 9, 2022
Wenxuan ZhangAn overview of methods to create R Shiny Desktop AppsIn this article, I am going to discuss two ways of deploying the R Shiny App as a desktop appMay 6, 20222May 6, 20222
