Capstone
Nick Wright
23 November 2017
John Hopkins Data Science Course – Capstone Project – Week 2
This is a progress report to provide an update as of week 2 of the capstone project. The data was downloaded from the website and the following analysis was carried out in order to answer the ‘Quiz 1’ questions. The longest line in each of the three sets of data is calculated.
library(tm)## Warning: package 'tm' was built under R version 3.4.2## Loading required package: NLPlibrary(stringi)
library(SnowballC)
library(wordcloud)## Warning: package 'wordcloud' was built under R version 3.4.2## Loading required package: RColorBrewerlibrary(RColorBrewer)
setwd("C:\\Users\\nicaw\\Documents\\R\\Work\\Capstone\\Coursera-SwiftKey\\final\\en_US")
Blogs <- readLines(con <- file("./en_US.Blogs.txt"), encoding = "UTF-8", skipNul = TRUE)
close(con)
length(Blogs)## [1] 899288fileName="en_US.blogs.txt"
con=file(fileName,open="r")
lineBlogs=readLines(con)
longBlogs=length(line)
close(con)
fileName="en_US.news.txt"
con=file(fileName,open="r")
lineNews=readLines(con) ## Warning in readLines(con): incomplete final line found on 'en_US.news.txt'longNews=length(line)
close(con)
fileName="en_US.twitter.txt"
con=file(fileName,open="r")
lineTwitter=readLines(con) ## Warning in readLines(con): line 167155 appears to contain an embedded nul## Warning in readLines(con): line 268547 appears to contain an embedded nul## Warning in readLines(con): line 1274086 appears to contain an embedded nul## Warning in readLines(con): line 1759032 appears to contain an embedded nullongTwitter=length(line)
close(con)
longBlogs<-stri_length(lineBlogs)
max(longBlogs)## [1] 40835longNews<-stri_length(lineNews)
max(longNews)## [1] 5760longTwitter<-stri_length(lineTwitter)
max(longTwitter)## [1] 213Starting with the ‘News’ file, a wordcloud was generated to show the most common words (which were generally prepositions: ‘the’, ‘and’ , ‘with’ , ‘was’ and ‘for’). As these are not very interesting, they were removed and the wordcloud rerun.
# Load
library("tm")
docNews <- Corpus(VectorSource(lineNews))
toSpace <- content_transformer(function (x , pattern ) gsub(pattern, " ", x))
docNews <- tm_map(docNews, toSpace, "/")
docNews <- tm_map(docNews, toSpace, "@")
docNews <- tm_map(docNews, toSpace, "\\|")
# Convert the text to lower case
docNews2 <- tm_map(docNews, content_transformer(tolower))
# Remove numbers
docNews2 <- tm_map(docNews2, removeNumbers)
docNews2 <- tm_map(docNews2, removeWords, c("the", "and", "with", "was", "that", "for"))
# Remove punctuations
docNews2 <- tm_map(docNews2, removePunctuation)
# Eliminate extra white spaces
docNews2 <- tm_map(docNews2, stripWhitespace)
# Text stemming
docNews2 <- tm_map(docNews2, stemDocument)
head(lineNews)## [1] "He wasn't home alone, apparently."
## [2] "The St. Louis plant had to close. It would die of old age. Workers had been making cars there since the onset of mass automotive production in the 1920s."
## [3] "WSU's plans quickly became a hot topic on local online sites. Though most people applauded plans for the new biomedical center, many deplored the potential loss of the building."
## [4] "The Alaimo Group of Mount Holly was up for a contract last fall to evaluate and suggest improvements to Trenton Water Works. But campaign finance records released this week show the two employees donated a total of $4,500 to the political action committee (PAC) Partners for Progress in early June. Partners for Progress reported it gave more than $10,000 in both direct and in-kind contributions to Mayor Tony Mack in the two weeks leading up to his victory in the mayoral runoff election June 15."
## [5] "And when it's often difficult to predict a law's impact, legislators should think twice before carrying any bill. Is it absolutely necessary? Is it an issue serious enough to merit their attention? Will it definitely not make the situation worse?"
## [6] "There was a certain amount of scoffing going around a few years ago when the NFL decided to move the draft from the weekend to prime time -- eventually splitting off the first round to a separate day."wordcloud(docNews2, min.freq = 1, max.words=200, random.order=FALSE, rot.per=0.35, colors=brewer.pal(8, "Dark2"))
Analysis was repeated for ‘Twitter’ and ‘Blogs’ files
Twitter:
## [1] "How are you? Btw thanks for the RT. You gonna be in DC anytime soon? Love to see you. Been way, way too long."
## [2] "When you meet someone special... you'll know. Your heart will beat more rapidly and you'll smile for no reason."
## [3] "they've decided its more fun if I don't."
## [4] "So Tired D; Played Lazer Tag & Ran A LOT D; Ughh Going To Sleep Like In 5 Minutes ;)"
## [5] "Words from a complete stranger! Made my birthday even better :)"
## [6] "First Cubs game ever! Wrigley field is gorgeous. This is perfect. Go Cubs Go!"
Blogs
## [1] "In the years thereafter, most of the Oil fields and platforms were named after pagan âgodsâ."
## [2] "We love you Mr. Brown."
## [3] "Chad has been awesome with the kids and holding down the fort while I work later than usual! The kids have been busy together playing Skylander on the XBox together, after Kyan cashed in his $$$ from his piggy bank. He wanted that game so bad and used his gift card from his birthday he has been saving and the money to get it (he never taps into that thing either, that is how we know he wanted it so bad). We made him count all of his money to make sure that he had enough! It was very cute to watch his reaction when he realized he did! He also does a very good job of letting Lola feel like she is playing too, by letting her switch out the characters! She loves it almost as much as him."
## [4] "so anyways, i am going to share some home decor inspiration that i have been storing in my folder on the puter. i have all these amazing images stored away ready to come to life when we get our home."
## [5] "With graduation season right around the corner, Nancy has whipped up a fun set to help you out with not only your graduation cards and gifts, but any occasion that brings on a change in one's life. I stamped the images in Memento Tuxedo Black and cut them out with circle Nestabilities. I embossed the kraft and red cardstock with TE's new Stars Impressions Plate, which is double sided and gives you 2 fantastic patterns. You can see how to use the Impressions Plates in this tutorial Taylor created. Just one pass through your die cut machine using the Embossing Pad Kit is all you need to do - super easy!"
## [6] "If you have an alternative argument, let's hear it! :)"
Next steps will be to look at how words are grouped and potentially build a predictive model