Yu Dong

Data Science & Analytics, Data Storyteller

Posts by Category

data viz

My 2024 Weekly Vizzes

2 minute read

This is my seventh year of this weekly visualization project. I began this journey in 2018 when I started my first full-time job. The goal is to visualize a ...

My 2023 Weekly Vizzes

2 minute read

This is my sixth year of this weekly visualization initiative ;) The goal is to find some fun datasets, visualize them in some fun (or boring) ways, and extr...

My 2022 Weekly Vizzes

2 minute read

This is my fifth year of this weekly visualization initiative ;) The goal is to find some fun datasets, visualize them in some fun (or boring) ways, and extr...

My 2021 Weekly Vizzes

3 minute read

Though MakeoverMonday project went into an ‘indefinite hiatus’ from 2021/9/27, I will keep on this weekly Tableau visualization journey. Please notice that ...

My 2020 MakeoverMonday Vizzes

3 minute read

This has been my third year doing Tableau Makeovermonday. Another fruitful year trying out 52 different visualizations on various topics :) MakeoverMonday i...

FDLC Salary Data Visualization

2 minute read

On 10/6/2020, DHS issued the Strengthening the H-1B Nonimmigrant Visa Classification Program Interim Final Rule, which raised the bar of the H1B wage levels ...

My 2019 MakeoverMonday Vizzes

3 minute read

Throughout 2019, I have been putting aside one hour every Monday to work on my Tableau visualizations following the Makeovermonday project. MakeoverMonday i...

My 2018 MakeoverMonday Vizzes

3 minute read

Starting from Jan 08, 2018, I decide to put aside one hour on Monday weekly to create some visualization and find some insights from the data. MakeoverMonda...

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blog

My First GPTs

2 minute read

In my previous post, I delved into the exciting realm of OpenAI’s latest offerings, setting the stage for an even more intriguing exploration this week. Toda...

Update My Blog with GPT

5 minute read

Today, I gained access to the GPT All Tools feature, an exciting upgrade for Plus users that integrates DALLE, browsing, and analysis with GPT-4, all within ...

Course Notes - ChatGPT Prompt Engineering

14 minute read

ChatGPT has been a very hot topic recently, and has shown great potential to improve productivity. Yesterday, I took the ChatGPT Prompt Engineering for Devel...

2023 LinkedIn Post Engagement Analysis

7 minute read

On Jan 2nd this year, I posted my annual reflection on LinkedIn. I am very happy to see some great interactions on the post and as a result, an increase in w...

Five Years in My DS Career

10 minute read

I started my first full-time data science job in Jan 2018, working as an Associate Product Analyst at Ancestry.com. This month, I officially finished the 5th...

How I Ramped Up My Blog Site UI

6 minute read

This weekend, I spent ~5 hours ramping up the UI of this personal website. Previously, it was using the default ‘slate’ Jekyll theme, which was set up direct...

My Data Science Projects List

less than 1 minute read

This is an archive of my past data science and analytics projects. Data Science & Analytics Projects Fraud Detection Machine Learning Algorithms ...

Advice On Starting A New Job

5 minute read

This week marked my first month at Brex. Time flies and it’s always surprising to see how many discoveries I have made in this first month when looking back....

Data Science & Analytics Reading List

3 minute read

This summer I got the opprotunity to mentor an intern in the Product Analytics team at Ancestry. I personally learned a lot from my mentor when I was an anal...

A Starter Code for Xgboost Regression

4 minute read

These days I have been writing too much SQL… Therefore, last week, to refresh my knowledge on xgboost and general modeling project process in R and Python, I...

Online Courses Reviews

8 minute read

Online courses have been a great supplementary part to my offline study and work. Whenever I am interested in exploring some new fields, or find myself lacki...

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reading notes

Reading Notes 2025 Jul - Aug

4 minute read

My Medium Articles! In the past two months, I continued writing articles per month on Medium and Towards Data Science. Here you go: From Data Scientist I...

Reading Notes 2025 May - Jun

4 minute read

My Medium Articles! In the past two months, I continued writing articles per month on Medium and Towards Data Science. Here you go: The Secret Power of D...

Reading Notes 2025 Mar - Apr

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My Medium Articles! In the past two months, I continued writing articles per month on Medium and Towards Data Science. Here you go: Google’s Data Science...

Reading Notes 2025 Jan - Feb

3 minute read

My Medium Articles! In the past two months, I continued writing articles per month on Medium and Towards Data Science. Here you go: Unlocking the Power o...

Reading Notes 2024 Nov - Dec

3 minute read

My Medium Articles! In the past two months, I kept the pace of writing 2 articles per month on Medium. Here you go: My Medium Journey as a Data Scientist...

Reading Notes 2024 Sep - Oct

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My Medium Articles! It has been six months since I started writing on Medium and I am approaching 3k followers now! Below are the articles I posted lately. ...

Reading Notes 2024 Jul - Aug

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My Medium Articles! In the past two months, I continued writing data science and AI contents on Medium. I am super excited to have more than 1k followers no...

Reading Notes 2024 May - Jun

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My Medium Articles! Before I jump into the summary of the articles I read in the past two months, I am excited to announce that I have become a write on Med...

Reading Notes 2024 Mar - Apr

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This is a summary of the data-science related blogs I read in the past two months. Hope you will enjoy the reading as well. Data Science Statistical Meas...

Reading Notes 2024 Jan - Feb

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This is the fourth year since I started reading data science blogs (mostly on Medium) every Friday and Sunday night. This habit has brought me immense self-f...

Reading Notes 2023 Nov - Dec

3 minute read

This post summarises the Medium blogs I read in the past two months. I have been exploring various LLM applications including GPTs and semantic search with t...

Reading Notes 2023 Sept - Oct

3 minute read

This post summarises the Medium blogs I read in the past two months. Hope you will enjoy the reading as well. Causal Inference Causal Analysis with PyMC:...

Reading Notes 2023 Jul - Aug

3 minute read

This post summarises the Medium blogs I read in the past two months. Hope you will enjoy the reading as well. DS, Analytics From Analytics to Actual Appl...

Reading Notes 2023 May - Jun

3 minute read

This post summarises the Medium blogs I read in the past two months. Hope you will enjoy the reading as well. DS, Analytics Creative Fatigue: How adverti...

Reading Notes 2023 Mar - Apr

3 minute read

This post summarises the Medium blogs I read in the past two months. Hope you will enjoy the reading as well. Causal Inference How to correctly select yo...

Reading Notes 2023 Jan - Feb

3 minute read

This is the first article of the reading notes series in 2023. It summarises the Medium blogs I read in the past two months. Hope you will enjoy the reading ...

Reading Notes 2022 Nov - Dec

4 minute read

This is the summary of the great blog posts I read in November and December. This is the last one of the year – I am glad I keep up with this habit of readin...

Reading Notes 2022 Sep - Oct

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This is a summary of the great Medium posts I came across in the past two months. Hope you enjoy it :) Causal Inference Causal Forecasting at Lyft (Part ...

Reading Notes 2022 Jul - Aug

3 minute read

This is a summary of the great Medium posts Elise and I read in July and Augest. I have been working on some customer segmentation project at work, so you wi...

Reading Notes 2022 May - Jun

2 minute read

This is a summary of the great Medium posts Elise and I read in May and June. Please enjoy :) Causal Inference A Survey of Causal Inference Applications ...

Reading Notes 2022 Mar - Apr

3 minute read

This is a summary of the great Medium posts Elise and I read in March and April. Please enjoy :) Experimentation Assign Experiment Variants at Scale in A...

Reading Notes 2022 Jan - Feb

2 minute read

As in 2021, this series of blogs summarise the best data science-related posts Elise and I came across in the past two months during our Friday and Sunday ni...

Reading Notes 2021 Nov - Dec

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This is my sixth and last blog of this series this year, summarising the great posts Elise and I came across during our Friday and Sunday night reading sessi...

Reading Notes 2021 Sept - Oct

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This is my fifth blog of this series (and second to last for this year), summarising the great posts Elise and I came across during our Friday and Sunday nig...

Reading Notes 2021 Jul - Aug

4 minute read

This is my fourth blog of this series, summarising the great posts Elise and I came across during our Friday and Sunday night reading sessions. As you can se...

Reading Notes 2021 May - Jun

3 minute read

This is my third blog of this series, summarising the great posts Elise and I came across during our Friday and Sunday night reading sessions. In these two m...

Reading Notes 2021 Mar - Apr

2 minute read

As mentioned in the last post, this year I have been reading DS&Analytics related blogs with my friend Elise every Friday and Sunday night. This is my se...

Reading Notes 2021 Jan - Feb

2 minute read

This year, I put reading data science related Medium & blog posts on my resolution list – the plan is to read three posts on Friday night and three on Su...

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