Ben Chuanlong Du's Blog

It is never too late to learn.

Effect of Duplicating Observations in Linear Models

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

coefficients don't change but variance become smaller. use formula to show it ...

Complete Duplication of All Data Points

Complete Duplication of Some Data Points

Duplication with Noise

common in computer vision …

Visualization for AI Concepts

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

Tools for (approximately) visualizing the architures of existing neural networks or for visualizing the traing process (training/validation loss/accuracy, activation, etc.) are extremely helpful! TensorBoard is one of the best …

Python for WeChat

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

ItChat A complete and graceful API for Wechat. 微信个人号接口、微信机器人及命令行微信,三十行即可 …

Tips on Delta Lake

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

Delta Lake

Delta Table

convert to delta [db_name.]table_name [partitioned by ...] [vacuum [retain number hours]]

vaccum

describe history db_name.table_name

can select from historical snapshot can also rollback to a historical snapshot rollback …