ctufts’s gists

ctufts / deepAssignmentOperatorExamples.R

Created April 28, 2016 19:56

Example illustrating the deep assignment operator's (<<-) use in R

	####################################################
	# case of global assignment
	# parent environment is the global environment
	# from Hadley Wickham's 'Advanced R'
	#####################################################
	x <- 0
	f <- function() {
	x <<- 1

	}

ctufts / PHL_Crime_By_District.R

Last active February 24, 2016 20:34


	##################### Import Libraries ##############################################
	# if you don't have the libraries below you can install the library using the
	# following command : install.packages('package_name_here_in_quotes')
	library(dplyr)
	library(lubridate)
	library(RColorBrewer)
	library(leaflet)
	library(stringr)
	library(rgdal)

ctufts / replaceValuesWithKeys.py

Last active November 7, 2015 22:39

Find 'value' in a list of tokens and replace them with the 'key' of a dictionary. The dictionary can have multiple values per key. Example use: replacing multiple nick names with one common name.

	s = ['c' ,'is', 'equal', 'to', 'b']
	print(s)
	# output >> ['c', 'is', 'equal', 'to', 'b']
	# dictionary of names:values
	d = {'joe':['a', 'b'], 'tom':['c', 'd']}

	# replace any values from the dict with the key value
	for i in range(0, len(s)):
	for key,value in d.items():
	for v in value:

ctufts / twitterStream_to_mysql.py

Last active July 8, 2019 01:37

The script creates a twitter stream listener using Tweepy then stores the data in a MySQL database. The code works with Python 3 and will also support emoji ( utf8mbr4 encoding ).

	# code for streaming twitter to a mysql db
	# for Python 3 and will support emoji characters (utf8mb4)
	# based on the Python 2 code
	# supplied by http://pythonprogramming.net/twitter-api-streaming-tweets-python-tutorial/
	# for further information on how to use python 3, twitter's api, and
	# mysql together visit: http://miningthedetails.com/blog/python/TwitterStreamsPythonMySQL/


	from tweepy import Stream
	from tweepy import OAuthHandler

ctufts / PhlCrime_GettingStarted_PT_I_II.R

Last active November 7, 2015 22:35

The script imports Philadelphia Crime Data Parts I and II (https://www.opendataphilly.org/dataset/crime-incidents), creates a summary based on year, month, and crime type and creates a basic map in leaflet using the first 1000 incidents

	# the following script will import Philadelphia Crime Data
	# Parts I and II, create a summary based on year, month, and crime type
	# and will create a basic map in leaflet using the first 1000 incidents
	# you will need to install dplyr, leaflet, readr, lubridate, and stringr
	# packages ( install.packages('package name') )

	rm(list = ls())
	library(dplyr)
	library(leaflet)
	library(readr)

ctufts / java_compatable_regex.txt

Last active September 8, 2016 20:15

Regular expression examples in R

	(?<!@\|#)\b\w+ : Remove all words starting with @ or # (remove hashtags and user handles from twitter)

	(?<!@\|#)\b\w{2,} : Same as above but only keep words with length of 2 or greater

Chris Tufts ctufts