R: implicit return values / return value of an assignment
The last expression evaluated in a function becomes the return value.
Recent Posts
Expectation Maximization Algorithm Intuition
之前写过一篇 Expectation-Maximization Algorithm，但是太细碎了，没有抓住核心。
Gradient and Directional Derivative
Original post is The Gradient and Directional Derivative from Mathematics School, Oregon State University. Here I thank the author(s) sincerely.
Generative Models
参考自 Introduction to Semi-Supervised Learning。
Python: Yes, you can unpack a generator!
def square_and_cube(x): yield x**2 yield x**3
Python: Generator Expressions / joblib.Parallel
其实 Digest of Fluent Python 里有讲，只是我实在是太不习惯它的用法了：
ggplot2: use geom_line() carefully when your x-axis data are descending
Given 3 points, $(1,1), (2,1), (2,2)$, how would you connect them with 2 segments? Subtly, geom_line of ggplot2 thinks in a different way when you order the ...