munrocket

// copy paste this in console
function shader_exporter(duration, width, heigth, paused) {
  document.getElementById('demogl').style.width = width + 'px';
  document.getElementById('demogl').style.height = heigth + 'px';
  document.getElementById('myResetButton').click();
  document.getElementById('myRecord').click();
  if (paused) document.getElementById('myPauseButton').click();
  let t0 = performance.now();
  function loop(){
    if (performance.now() - t0 > duration * 1000) {

LeoHuckvale

Useful tip from the late creator of matplotlib, John Hunter.

http://matplotlib.1069221.n5.nabble.com/dynamically-add-subplots-to-figure-td23571.html

import matplotlib.pyplot as plt

# start with one
fig = plt.figure()
ax = fig.add_subplot(111)

bsweger

Useful Pandas Snippets

A personal diary of DataFrame munging over the years.

Data Types and Conversion

Convert Series datatype to numeric (will error if column has non-numeric values)
(h/t @makmanalp)

erincatto

Given J*JT * x = b, solve for x in linear time and space.

J is m by n
x is m by 1
b is m by 1
m < n

J is a rectangular matrix that represents a tree with equal and opposite entries.

For example: