Wenxuan ZhangUnderstanding Cohen’s KappaCohen’s Kappa, or quadratic weighted kappa, is a metric to measure agreement between two ratings.·3 min read·Nov 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.·6 min read·Aug 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…·7 min read·Jul 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…·4 min read·Dec 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…·5 min read·Nov 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…·5 min read·Oct 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…·5 min read·Oct 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…·6 min read·Sep 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…·4 min read·Sep 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 app·7 min read·May 6, 2022--2--2