Publications by Sung Lee
Data 607 Final Project
Assignment on RPubs Rmd on Github Introduction NYC (New Amsterdam) was founded on a land deal and from then on has been driven by profit and commerce. NYC has since weathered many booms and busts. It is with this I endeavor to analyze the impact on businesses of recessions in the United States. My father is a small business owner and I have fri...
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Sung Lee Data 607 Week 12 Assignment
Assignment on RPubs Rmd on Github Introduction The purpose of this assignment is to report on a recommender system. Perform a Scenario Design analysis as described below. Consider whether it makes sense for your selected recommender system to perform scenario design twice, once for the organization (e.g. Amazon.com) and once for the organizat...
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Data 607 Project 4 Assignment
Assignment on RPubs Rmd on Github Introduction The purpose of this project is to get our feet wet in document classification. One application of document classification is identifying “spam” and “ham”. Spam is “any kind of unwanted, unsolicited digital communication, often an email, that gets sent out in bulk.”1 Ham would be the opp...
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Sung Lee Data 607 Extend Assignment
Assignment on RPubs Create Rmd on Github Extend Rmd on Github Purpose This project is to extend Michael Munguia’s stringr CREATE project. It will provide additional demonstration functions for the stringr package. Data This Rmd will employ Michael’s csv data that is already a part of this repository. The csv file is endorsements-2020.csv a...
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Sung Lee Data 607 Week 10 Assignment
Assignment on RPubs Rmd on Github Introduction Assignment In Text Mining with R, Chapter 2 looks at Sentiment Analysis. In this assignment, you should start by getting the primary example code from chapter 2 working in an R Markdown document. You should provide a citation to this base code. You’re then asked to extend the code in two ways: W...
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Data 606 Sung Lee Presentation 8.25
Problem 8.25 Murders and poverty, Part I. The following regression output is for predicting annual murders per million from percentage living in poverty in a random sample of 20 metropolitan areas. Charts Questions Write out the linear model. We get the values from the chart. The intercept is -29.901 and the slope is 2.559 \(\hat{y} = -29.901 ...
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Data 607 Week 9 Assignment
Assignment on RPubs Rmd on Github Introduction This asignment will employ the New York Times’ set of APIs to read data into JSON and transform it into an R data frame. We will use the New York Times Top Stories API and select world stories. An example of the call would use this API call https://api.nytimes.com/svc/topstories/v2/world.json?api...
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Data 607 Project 3
Assignment on RPubs Rmd on GitHub Introduction The purpose of this assignment is to answer the question, “Which are the most valued data science skills?” Within the team we have had experiences applying for jobs, but we were each relatively new to the data science vernacular. For example, we have one seasoned programmer and a student with a...
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Test Project 3
References: [http://www.sthda.com/english/wiki/text-mining-and-word-cloud-fundamentals-in-r-5-simple-steps-you-should-know] [https://www.tidytextmining.com/nasa.html#word-co-ocurrences-and-correlations] library(tm) ## Loading required package: NLP library(SnowballC) library(wordcloud) ## Loading required package: RColorBrewer library(RColorBrewe...
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Data 607: Tidyverse Create
Purpose Not all web pages are created the same. Oftentimes, in trying to analyze data, we will need a handy utility to scrape web pages. The package rvest is a handy Tidyverse package that will save time having to “harvest”1 web pages. Preparation We will need to load the library for rvest. library(rvest) # Tidyverse package for rv...
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