TJ Lin – Medium

TJ Lin

TJ Lin

Why Unlimited Swiping Right Fails Men: A Data Scientist’s View

On most dating apps, swiping right on a profile means sending a match request, while swiping left skips the profile. Once both users swipe…

Sep 29

Why Unlimited Swiping Right Fails Men: A Data Scientist’s View

Sep 29

TJ Lin

Reaching 2100+ in Leetcode Contests within Three Months

There seem to be many misunderstandings about Leetcode (or algorithm problems), such as the idea that you need to memorize all the Leetcode…

Sep 22

Reaching 2100+ in Leetcode Contests within Three Months

Sep 22

TJ Lin

Five Years of Investment Experience and Changes

I spent a year learning before I finally opened an account and bought stocks. I initially invested in global market cap-weighted ETFs (VT +…

Sep 17

Sep 17

TJ Lin

寫 online judge 時難以發覺的 bug

有些 online judge (或者說大部分的 online judge) 不像 leetcode，程式有錯的話告訴你錯哪筆測資，記錄一下我找很久的各種 bug...... 語言為 C/C++，主要都是在 UVA judge 踩到的，不確定其他的 judge 行為是不是一樣。

May 18, 2020

May 18, 2020

TJ Lin

Using MKL to boost Numpy performance on Ubuntu

Numpy is using BLAS (Basic Linear Algebra Subprograms) internally. Intel provide a better alternative called “Math Kernel Library” (MKL)

Oct 12, 2019

Using MKL to boost Numpy performance on Ubuntu

Oct 12, 2019

TJ Lin

Ubuntu 使用 Intel MKL 加速 Numpy

Numpy 底層用到了所謂的「BLAS」的線性代數 library，Intel 出了一個 Math Kernel Library (MKL) 來優化，因為是 Intel 出的，所以你的 CPU 也必須是 Intel 的，網路上有查到 Intel MKL 也可以跑在 AMD…

Oct 12, 2019

Ubuntu 使用 Intel MKL 加速 Numpy

Oct 12, 2019

TJ Lin

Pandas I/O Benchmarking

On the official site of Pandas, it has a page for its I/O functions with simple profiling. But something I care about does not on that…

Jun 4, 2019

Pandas I/O Benchmarking

Jun 4, 2019

TJ Lin

Pandas I/O 效率測試

Pandas 在官網上有個頁面介紹各種 I/O function，也簡單測了時間，不過有些我在意的東西沒有測到，只好我自己來測一遍啦 (Github)。

Jun 4, 2019

Pandas I/O 效率測試

Jun 4, 2019

TJ Lin

美國券商 TD Ameritrade 2019 開戶心得

受到綠角的啟發，決定開一個美國證券戶來買美國 ETF 。研究了一番以後決定開在 TD Ameritrade ，主要是考慮到它會自動退某些債券 ETF 一部份的稅。雖然 TD 的手續費較高，但省去研究美國稅法以及退稅的時間金錢成本還是很划算的。就在這裡紀錄開戶到匯款的過程。

Mar 18, 2019

美國券商 TD Ameritrade 2019 開戶心得

Mar 18, 2019

TJ Lin

What to do when AUC less than 0.5

Someone asked this question on PTT DataScience board. He trained a rectal cancer detection model on MRI images with 5 fold cross…

Mar 15, 2019

Mar 15, 2019

TJ Lin

TJ Lin

Software engineer, write some articles for my younger self. Follow me on X https://x.com/lintseju and blog https://writings.jigfopsda.com/en/

Following

Help
Status
About
Careers
Press
Blog
Privacy
Terms
Text to speech
Teams