PinnedApplied Data Science with Churn Problem. Building Predictive Machine Learning Model for Consumer Business IndustryIntro — In the consumer product/service industry, the churn problem is crucial for business. A churn problem is a general way of describing customers switching to another or canceling out — for example, telecommunication phone plans, gaming platforms, entertainment streaming platforms. However, every business defines the Churn problem differently concerning each’s business…Data Science20 min read
Nov 18, 2021Hypothesis Pitfalls on Excess Coffee Effects Research in University of South AustraliaI came across various news posts about the manifest of proof on high coffee consumption’s impact on the brain, heart. Then I traced back to the citing source, and it was referenced in a research article: Kitty Pham, Anwar Mulugeta, Ang Zhou, John T. O’Brien, David J. …Data Science3 min read
Nov 8, 2021Blockchain UnderstandingAfter several technical, non-technical books, occasional random blog posts, videos about blockchain in the past, I still found blockchain misleading, confusing, unintuitive. It is not about cryptography, not about the distributed network, not about the database design, not about software architect, etc. Literally, chains of blocks of data. Today, HBR’s…Blockchain3 min read
Oct 21, 2021DeepMind AlphaGo Documentary review.Today, I watched the 2-hour DeepMind AlphaGo documentary. Astonishing. The editor Cindy Lee did fantastic work on the editing and drama-style storytelling. I first heard this match-up news years ago. At that time, the news didn’t surprise me much. I (like many others) thought computer programs beating humans wasn’t fresh…Machine Learning3 min read
Oct 17, 2021Solving Common Probability Problems with Python Pt.2 — Continuous DataContinuous Data measures scale units, e.g., height, weight, speed, time. The value can go ‘continuously,’ unlimited within any two numbers. For example: 1.0000001 meters, 65.98574123213kg, 100.5kg, 100.999333kg. For every two variables, we can have infinite possible values in between. …Data Science3 min read
Oct 16, 2021Inside Airbnb Boston 2021: Building a Machine Learning Price Predictor model for Boston ListingsInside Airbnb Boston 2021: Building a Machine Learning Price Predictor model for Boston Listings What is the article about? In this post, I will conduct a data mining effort by following CRISP-DM standards on the dataset of Airbnb Boston Listing 2021. Build a listing price estimator model with Machine Learning. …Data Science8 min read
Oct 11, 2021Pandas Data Cleaning: Remove rows with empty data or missing valuesA trivia task that for data cleaning or machine learning model preparation is to remove rows or columns that have empty data or missing values. Example of removing rows. Here are two quick ways to do it. Use dropna() that when you don’t care which rows, just drop them. df.dropna(axis='rows') 2. Use drop() with…Pandas2 min read
Sep 29, 2021Create Your Own WeChat Mini Program and Pulling External API Data to ItWeChat mini program is phenomenal and ubiquitous these days. It is an interesting semi-Hybrid app that served inside WeChat app. You may think of it as a program inside an app, or even think of it as ‘function as a service’, a tiny app that is runnable without downloading. The…Wechat Mini Program9 min read
Sep 29, 2021Use Python to call Drupal 9 core RESTful API to create new contentWith Drupal 9 out-of-the-box RESTful support make decoupling so much more convenient. We make it Drupal 9 as a decoupled headless service, serving entities for external apps. (Python, Java, NodeJS whichever you favor) Intro In this post, I will show you how to use Python to make an API POST…Python2 min read
Aug 9, 2021Solving Common Probability Problems with Python Pt.1 — BinomialIn statistics, data analysis, or data science related projects, probability is always fundamental. The entire world is full of randomness, but the creator of the universe makes it somehow certain with uncertainty. Like the Normal Distribution, the bell curve makes the disorder in orderly ways. …Probability6 min read
