John Swain swainjo

Country Opinions

In the video game Elite:Dangerous players can buy and sell commodities at stations around the galaxy. This gist shows how to use Neo4j and Cypher queries for trading decisions in this game.

Movie Recommendations with k-Nearest Neighbors and Cosine Similarity

Introduction

The k-nearest neighbors (k-NN) algorithm is among the simplest algorithms in the data mining field. Distances / similarities are calculated between each element in the data set using some distance / similarity metric ^^[1]^ that the researcher chooses (there are many distance / similarity metrics), where the distance / similarity between any two elements is calculated based on the two elements' attributes. A data element’s k-NN are the k closest data elements according to this distance / similarity.

1. A distance metric measures distance; the higher the distance the further apart the neighbors. A similarity metric measures similarity; the higher the similarity the closer the neighbors.

	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>

	body {
	font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
	width: 960px;
	height: 500px;
	position: relative;
	}

	<!DOCTYPE html>

	<html xmlns="http://www.w3.org/1999/xhtml">

	<head>

	<meta charset="utf-8">
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
	<meta http-equiv="Content-Style-Type" content="text/css" />
	<meta name="generator" content="pandoc" />

	== Green Man POC
	:neo4j-version: neo4j-2.1
	:author: John Swain
	:twitter: @swainjo
	:tags: domain:POC

	=== Load Sample Data

	//setup
	//hide

	=== Load Sample Data

	//setup
	//hide
	[source,cypher]
	----
	create
	(_8:`Tweet` {`created_at`:"Tue Sep 16 07:49:19 +0000 2014", `favorites`:0, `id`:511783879238488064, `text`:"RT @selinasorrels: DON'T BE AFRAID~~~ BE AWARE...Computer Models Tell Us That This Ebola Pandemic Could Soon Kill Millions... #Geo-Eng~
	ht…"}),
	(_9:`User` {`followers`:193, `following`:282, `location`:"Lelystad 06-22.44.69.21", `name`:"Harmen Bouwstra", `profile_image_url`:"http://pbs.twimg.com/profile_images/498588508273922048/PrR7_4zL_normal.jpeg", `screen_name`:"HBouwstra"})

John Swain swainjo

Country Opinions

Movie Recommendations with k-Nearest Neighbors and Cosine Similarity

Introduction

FIS Alpine Skiing seasons

Introduction