Paper Sizes

This is more than ten years old talk from one of my favourite YouTube channels Gresham College by professor John D. Barrow (1952-2020).

It talks about the different paper sizes we have and what are their mathematical properties.

Here are some screenshots with interesting information.

International standard paper sizes.

A series

Georg Christoph Lichtenberg proposed the standardized paper size system used globally today except in Canada and the US defined by ISO 216, which has A4 as the most commonly used size.

B series

C series

Uses

American Paper Sizes

Golden Ratio

Medieval books

Dark Matplotlib themes/styles

I was searching dark themes for Matplotlib and found these three. And put them here with examples so I can find them faster next time.

QB style

Website: github.com/quantumblacklabs/qbstyles

Install:

pip install qbstyles

Example code:

import matplotlib.pyplot as plt
from qbstyles import mpl_style

def plot(dark):
  mpl_style(dark)
    
  plt.plot([1, 3, 9, 5, 2, 1, 1], marker='o')
  plt.plot([4, 5, 5, 7, 9, 8, 6], marker='o')

  plt.show()

plot(dark=True)

ing-theme-matplotlib

Website: pypi.org/project/ing-theme-matplotlib/

Install:

pip install ing_theme_matplotlib

Example code:

import matplotlib.pyplot as plt
from ing_theme_matplotlib import mpl_style

def plot(dark):
  mpl_style(dark)
    
  plt.plot([1, 3, 9, 5, 2, 1, 1], marker='o')
  plt.plot([4, 5, 5, 7, 9, 8, 6], marker='o')

  plt.show()

plot(dark=True)

mplcyberpunk

Website: github.com/dhaitz/mplcyberpunk

Install:

pip install mplcyberpunk

Example code:

import matplotlib.pyplot as plt
import mplcyberpunk

def plot():
  plt.style.use("cyberpunk")
    
  plt.plot([1, 3, 9, 5, 2, 1, 1], marker='o')
  plt.plot([4, 5, 5, 7, 9, 8, 6], marker='o')

  mplcyberpunk.add_glow_effects()
  plt.show()

plot()

def plot_lines_glow():
  plt.style.use("cyberpunk")
    
  plt.plot([1, 3, 9, 5, 2, 1, 1], marker='o')
  plt.plot([4, 5, 5, 7, 9, 8, 6], marker='o')

  mplcyberpunk.make_lines_glow()
  plt.show()


def plot_underglow():
  plt.style.use("cyberpunk")
    
  plt.plot([1, 3, 9, 5, 2, 1, 1], marker='o')
  plt.plot([4, 5, 5, 7, 9, 8, 6], marker='o')

  mplcyberpunk.add_underglow()
  plt.show()