Weber–Fechner law

XKCD style of Mathematica plot:

XKCD style of Matplotlib (bug for line labels): This code must run under python2 environment.

A good example of 2D Histogram using astroML:

Convert Jupyter Notebook to html: jupyter nbconvert --to html low-z-galaxy-survey.ipynb

Convert LaTeX to html gif picture:


A good website to check visibility for a given RA and DEC:

Convert figure to data points:

How to use latex in jekyll?

  • gem install kramdown
  • Change the markdown line in _config.yml to markdown: kramdown
  • And add something like
<script type="text/javascript" src=""></script>

to _layouts/default.html. Now you can simply mark any mathematics in your posts with $$

Princeton Program: