Zhiping Yang ouyangzhiping

Building a beamer presentation with knitr.

Introduction

The documents included are the input for knitr. In addition you need to have the tool pandoc installed. I also use a custom beamer template to add the University of Utah \institute command to the template. It also changes the indentation some.

Steps

knit document with

Install Python

$ brew install readline sqlite gdbm
$ brew install python --universal --framework
$ python --version
Python 2.7

Symlinks...

The range sliders at the top change the values for the force-directed algorithm and the buttons load new graphs and apply various techniques. This will hopefully serve as a tool for teaching network analysis and visualization principles during my Gephi courses and general Networks in the Humanities presentations.

Notice this includes a pretty straightforward way to load CSV node and edge lists as exported from Gephi.

It also includes a pathfinding algorithm built for the standard data structure of force-directed networks in D3. This requires the addition of .id attributes for the nodes, however.

Now with Clustering Coefficients!

Also, it loads images for nodes but the images are not in the gist. The code also refers to different network types but the data files on Gist only refer to the transportation network.

Zero downtime deploys with unicorn + nginx + runit + rvm + chef

Below are the actual files we use in one of our latest production applications at Agora Games to achieve zero downtime deploys with unicorn. You've probably already read the GitHub blog post on Unicorn and would like to try zero downtime deploys for your application. I hope these files and notes help. I am happy to update these files or these notes if there are comments/questions. YMMV (of course).

Other application notes:

Our application uses MongoDB, so we don't have database migrations to worry about as with MySQL or postgresql. That does not mean that we won't have to worry about issues with the database with indexes being built in MongoDB or what have you.
We use capistrano for deployment.

Salient points for each file:

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

	if [ -f "$rvm_path/scripts/rvm" ] && [ -f ".ruby-version" ] && [ -f ".ruby-gemset" ]; then
	source "$rvm_path/scripts/rvm"
	rvm use `cat .ruby-version`@`cat .ruby-gemset`
	fi

	#!/usr/bin/env python
	# Twilio Tools for Reminding & Calling
	# Download the twilio-python library from http://twilio.com/docs/libraries
	from twilio.rest import TwilioRestClient
	from twilio import twiml
	from flask import Flask

	app = Flask(__name__)

	account = "TWILIO ACCOUNT"

	common: &common
	adapter: postgresql
	username: ouyang
	password: ouyang
	#host: 33.33.33.10

	development:
	<<: *common
	database: attention_dev

	# install xcode

	app store => xcode => command line tool

	# install brew

	ruby -e "$(curl -fsSL https://raw.github.com/mxcl/homebrew/go)"

	# install brew cask

	{
	"cmd": ["pandoc.exe", "--to=html", "--output=$file.html", "$file"],
	"selector": "source.md"
	}