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@GrantTrebbin
GrantTrebbin / si470x_log_processor.py
Created May 10, 2015
Create a series of images to demonstrate weather related events using python and matplotlib
View si470x_log_processor.py
#!/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
@GrantTrebbin
GrantTrebbin / imCompress.py
Created May 21, 2015
Compressing Similar PNG Images
View imCompress.py
#!/usr/bin/python
from PIL import Image
import numpy
import argparse
import os
import sys
#Configure argument parser to take input arguments
@GrantTrebbin
GrantTrebbin / QRBackup.sh
Last active Oct 23, 2020
How to encode and decode a file backed up as a series of printed QR codes
View QRBackup.sh
# 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 / MailStat.py
Created Oct 19, 2015
Crudely analyse the emails in an mbox file to generate statistics
View MailStat.py
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 / MagField.py
Created Nov 3, 2015
A quick demonstration of the magnetic field of a circular current loop
View MagField.py
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 / MagField2.py
Created Nov 28, 2015
In plane magnetic field of a current loop of radius a, distance r from the loop axis. Field will be perpendicular to the plane.
View MagField2.py
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 / orderGraph.py
Created Feb 28, 2016
Visualizing Periodic Order Schedules
View orderGraph.py
import random
import math
import sqlite3
import numpy
import matplotlib.pyplot as plt
from matplotlib.collections import LineCollection
def order_trajectory(base, colours, trajectory):
scale = 500
day_trajectory = trajectory / 24
View GenerateCards.py
import itertools as itt
from collections import deque
# Each element of a sequence can have these values
possible_elements = [0, 1, 2, 3, 4, 5, 6, 7]
element_count = len(possible_elements)
# A sequence contains this many elements
sequence_length = 4
@GrantTrebbin
GrantTrebbin / DirHash.ps1
Created Oct 15, 2016
Create fingerprints of directories and files that incorporate name and directory structure
View DirHash.ps1
function Hex_To_Bytes($hex){
# Takes a string with an even number of hexadecimal characters and
# converts it two characters at a time to an array of bytes half as long
# Initialize ouput byte array
$hexLength = $hex.Length
$byteLength = $hexLength / 2
$bytes = ,0 * ($byteLength)
# generate bytes by taking 2 hexadecimal characters at a time
@GrantTrebbin
GrantTrebbin / Backup.ps1
Last active Oct 30, 2016
Create encrypted and compressed backups only when warranted
View Backup.ps1
<#
.SYNOPSIS
Backs up and encrypts a directory or file
.DESCRIPTION
Backs up files or directories by adding it them a tar file and then
encrypting it with a public key. Becuase public key encryption is used
there are no passwords stored anywhere.
gpg must be installed and the public key you want to use must be imported.