tinybike

# Fun with sequential differences
# @author jack@tinybike.net

# Recursion (hideous...or maybe I'm just bad at it)
function seqdiff!(x; top=NaN, differences=[])
    if isempty(x)
        return [0, differences], sum(differences)
    end
    if isnan(top)
        top = pop!(x)

tinybike

#!/usr/bin/env python
"""
simple mssql -> csv file example using pymssql
@author jack@tinybike.net
"""
import csv
import datetime
import pymssql
from decimal import Decimal

tinybike

% Resourceful.m
% A 'game of life' where aging is an emergent property of resource limits.
% (c) Jack Peterson (jack@tinybike.net), 4/21/2012

% Setup:
% A single type of organism with a single resource type.
% Things live on an env_size x env_size grid.
% env is the environmental grid.
% haz is the hazards grid. Each time step, there is a probability haz(i,j)
% that an organism living at tile (i,j) will be killed.

tinybike

% AutoFilter.m
% Estimates the autoregression kernel of a noisy input signal
% using a simple low-pass filter.
% (c) Jack Peterson (jack@tinybike.net), 2011

% Variable definitions:
% tests: number of different corrupted signals to analyze
% its: maximum filter power to test on each signal
% noisemax: number of different noise levels to test
% nstd: standard deviation of white noise

tinybike

#!/usr/bin/env python
"""
A simple agent-based model of a financial market.

(c) Jack Peterson (jack@tinybike.net), 2012
"""
from __future__ import division
from random import random, shuffle
import pylab as p
from collections import Counter

tinybike

% AFTree.m
% "Anti-ferromagnetic" model for tree growth
% (c) Jack Peterson (jack@tinybike.net), 2011

% Define an NxN grid (T), with each grid point big enough to hold one tree.
% Each element T(i,j) = 1 if there a tree has randomly started to grow
% there, and T(i,j) = 0 otherwise.
N = 100;
T = round(rand(N));

tinybike

function licor = licorify(filename)
%% licorify.m converts .81x Licor files into a Matlab structure (licor), 
% which is organized as follows:
%
% - licor.headers: Structure containing the 31-row header block from the .81x
% file; i.e., the 'TSource' data is stored in licor.headers.TSource
%
% - licor.footers: Structure containing the 23-row footer block, organized in
% the same way as licor.headers
%

tinybike

function f = randarbmulti(x,y,N)
% RANDARBMULTI generates N random numbers from an arbitrary PDF, defined by
% vectors x and y.  Modified from randarb.m (Dave Dykes) at:
% http://www.mathworks.com/matlabcentral/fileexchange/6506-obs-from-arbitrary-pdf
%
% (c) Jack Peterson (jack@tinybike.net), 4/21/2013

cdf_y = cumsum(y);
sum_y = sum(y);

tinybike

<?php
/**
 * Example Authorize.Net transaction postback handler.
 * Writes transaction records to a MySQL database.
 *
 * Uses the Authorize.Net PHP SDK, which can be found at:
 * https://github.com/AuthorizeNet/sdk-php
 *
 * Example HTML form:
 *

tinybike

#!/usr/bin/env python
"""
parse a text file and count the occurrences of words in the file
@author Jack Peterson (jack@tinybike.net)
"""
import sys
import math
import sqlite3

def wordcount(data):