salmoni’s gists

salmoni / velocity.r

Created August 19, 2013 14:48

R code to measure 'velocity', how much each data point differs according to its neighbours. Accepts a vector and returns a single value measurement of velocity.

	velocity <- function(vector) {
	N <- length(vector)
	val <- sum(abs(vector[1:N-1]-vector[2:N]))
	return (val)
	}

salmoni / linear_least_squares.py

Created August 19, 2013 14:49

Brief code to calculate line of best fit for a single vector ('y'). Assumes the 'x' variable is a simple range from 0 .. N-1. Returns the intercept, the slope, the correlation between x and y, and the residual (error). Doesn't use the lstsq function in numpy but the results are the same.

	import numpy

	x = numpy.array(range(400))
	xm = x.mean()
	xstd = x.std()

	def fitline(y):
	N = len(y)
	x = numpy.array(range(N))
	ym = y.mean()

salmoni / Force IE10

Created April 8, 2014 15:23

Changing Windows registry so that IE emulates IE10. For all codes, see http://msdn.microsoft.com/en-us/library/ee330730(v=vs.85).aspx

	import _winreg as wreg
	current_file = __file__
	key = wreg.CreateKey(wreg.HKEY_CURRENT_USER, "Software\\Microsoft\\Internet Explorer\\Main\\FeatureControl\\FEATURE_BROWSER_EMULATION")
	wreg.SetValueEx(key, current_file, 0, wreg.REG_DWORD, 10001)

salmoni / least_squares_fit.py

Created April 8, 2014 15:25

Brief code to calculate line of best fit for a single vector ('y'). Assumes the 'x' variable is a simple range from 0 .. N-1. Returns the intercept, the slope, the correlation between x and y, and the residual (error). Doesn't use the lstsq function in numpy but the results are the same.

	import numpy

	x = numpy.array(range(400))
	xm = x.mean()
	xstd = x.std()

	def fitline(y):
	N = len(y)
	x = numpy.array(range(N))
	ym = y.mean()

salmoni / GroupedDescriptives.py

Created April 8, 2014 15:26

Grouped descriptives

	"""
	Grouped descriptives

	(c) 2013, Alan James Salmoni
	"""

	def Count(data):
	return len(data)

	def Sum(data):

salmoni / today.py

Created April 8, 2014 15:28

Get the date today. Returns something like 2013-10-14.

	import datetime
	def GetToday():
	now = datetime.date.today()
	return now.strftime("%Y-%m-%d")

	if __name__ == '__main__':
	print GetToday()

salmoni / ParseLineOfCSV.py

Created April 12, 2014 20:51

Parses a single line of CSV with a set (multiple!) delimiters and a set (multiple!) of quotation characters. Embedded quotes are kept honest (see examples at bottom of file).

	def ParseLine(line, delims, quotes):
	"""
	Parses a line of text into components. This attempts to
	be a proper parser that can cope with multiple delimiters.
	"""
	inQuote = False # flag for being 'within' quotes
	token = '' # current token
	tokens = [] # list of tokens
	for char in line:
	if inQuote: # so if we're in the middle of a quote...

salmoni / ParseCSVFile.py

Created May 1, 2014 11:42

Python: Class to parse a CSV file using the parser in another gist. Instantiate this object with a) the path + filename, b) delimiters (multiple accepted) and c) quote characters and it returns a file object that can be iterated over and read normally.

	class CSVObject(object):
	"""
	This class instantiates a file object as an interable. It means that
	CSV files can be read more efficiently than reading the entire data
	into memory.
	"""
	def __init__(self, fileName, delims, quotes):
	self.fileName = fileName
	self.delims = delims
	self.quotes = quotes

salmoni / goQueryTest.go

Last active October 13, 2024 12:20

Parsing HTML in Go/Golang using goQuery to extract data from only one of multiple tables. Demonstrates nested Find statements.

	package main

	import (
	"fmt"
	"log"
	"strings"

	"github.com/PuerkitoBio/goquery"
	)

James Smith salmoni