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@GrantTrebbin
GrantTrebbin / MagField.py
Created November 3, 2015 13:18
A quick demonstration of the magnetic field of a circular current loop
import numpy as np
import matplotlib.pyplot as plt
import scipy.special as sp
a = 1.55
current = 1
mu = 4 * np.pi / 10000000
# equal to sqrt(4ra(z^2 + (a+r)^2)^(-1))
def k_val (R, Z):
@GrantTrebbin
GrantTrebbin / MailStat.py
Created October 19, 2015 09:50
Crudely analyse the emails in an mbox file to generate statistics
import mailbox
from email.header import decode_header
import re
import itertools
regex = re.compile('[^a-zA-Z0-9]')
words = []
for message in mailbox.mbox('Inbox.mbox'):
subject, encoding = decode_header(message['subject'])[0]
@GrantTrebbin
GrantTrebbin / QRBackup.sh
Last active December 20, 2023 17:54
How to encode and decode a file backed up as a series of printed QR codes
# How to encode and decode a file backed up as a series of printed QR codes
# Install the required tools
sudo apt-get update
sudo apt-get install zbar-tools imagemagick qrencode
################################################################################
# Convert the file to a base 64 encoded format. Probably not needed as QR codes
@GrantTrebbin
GrantTrebbin / imCompress.py
Created May 21, 2015 13:16
Compressing Similar PNG Images
#!/usr/bin/python
from PIL import Image
import numpy
import argparse
import os
import sys
#Configure argument parser to take input arguments
@GrantTrebbin
GrantTrebbin / si470x_log_processor.py
Created May 10, 2015 09:20
Create a series of images to demonstrate weather related events using python and matplotlib
#!/usr/bin/python
import csv
import sys
from datetime import datetime
import matplotlib.pyplot as plt
import matplotlib.dates as mdates
import matplotlib.image as image
import matplotlib.lines as mlines
import os.path