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magsol / OpenCV Introduction.ipynb
Created December 2, 2013 20:14
IPython notebook introducing the basics of OpenCV.
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magsol / histogram_equalization_in_python.ipynb
Created September 19, 2013 18:47
IPython notebook about histogram equalization with images. Basic image processing.
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magsol / parse_hashmap.py
Created March 15, 2013 15:34
This script takes the output of an Apache Mahout job (in HashMap format) and converts it to a histogram.
import numpy as np
import sys
import matplotlib.pyplot as plot
import csv
# read the arguments - need two files
if len(sys.argv) < 3:
quit('python parse.py [raw data file] [mahout output]')
# read the files
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magsol / sample_uniform.py
Last active December 15, 2015 00:09
Demonstrates how to sample from exponential and gaussian distributions using only a uniform distribution (useful for languages like PHP with no built-in statistical sampling libraries).
import numpy as np
import matplotlib.pyplot as plot
import sys
def exp(mean, samples = 100):
y = []
lambda_param = (1 / mean)
for i in range(0, samples):
rand = np.random.rand()
y.append(np.log(1 - rand) / (-1.0 * lambda_param))
@magsol
magsol / particles.js
Created March 15, 2013 15:28
A small modification of some public javascript code to simulate a bunch of particles exerting gravitational effects on one another. When enough particles gather in a small enough space, they explode outward.
// A great deal of this code was inspired by Codeflow.
// http://codeflow.org/entries/2010/aug/22/html5-canvas-and-the-flying-dots/
// I just added the bit where the particles explode :)
var Universe = function() { this.init.apply(this, arguments); };
Universe.prototype = {
init: function(numParticles, interval, maxVelocity, maxAcceleration, criticalMass, criticalRadius) {
var canvas = document.getElementById('particles');
var context = canvas.getContext('2d');