∫ntegrabℓε ∂iﬀerentiαℓs · unorganised notes, code, and writings of random topics

QQ-plot and PP-plot

July 23, 2021 blog math code

Both QQ-plot and PP-plot are called the probability plot, but they are different. These plots are intended to compare two distributions, usually at least one of them is empirical. It is to graphically tell how good the two distributions fit. [more]

Interpreting linear regression summary from statsmodels

July 16, 2021 blog math code

The python package statsmodels has OLS functions to fit a linear regression problem. How well the linear regression is fitted, or whether the data fits a linear model, is often a question to be asked. The way to tell is to use some statistics, which by default the OLS module... [more]

Bokeh, interactive widgets, and jupyterlab

July 13, 2021 blog code

Jupyter notebooks and visualization are natural marriage. It is more fun if we can skew this or that a bit by turning a knob or selecting something from a drop down. This is where so called interactive widgets come to play. There are a lot of examples on how to... [more]

Lagrangians and Portfolio Optimization

June 22, 2021 blog math code

A portfolio optimization problem in Markowitz style looks like the following [more]

htop cheatsheet

May 25, 2021 blog system

htop is useful and bring forth very rich information on one screen. Here is the cheatsheet to understand it: [more]