Couple of months back I read Jeffrey Breen’s presentation on mining Twitter for consumer attitudes towards airlines, so I was just curious how it would look if I estimate the sentiment toward major hotels.

So here it is:
# load twitter library > library(twitteR) # search for all the hilton tweets > hilton.tweets=searchTwitter('@hilton',n=1500) > length(hilton.tweets) [1] 162 > class(hilton.tweets) [1] "list" > tweet=hilton.tweets[[1]] > class(tweet) [1] "status" attr(,"package") [1] "twitteR" > tweet$getScreenName() [1] "i_RAHOFA" > tweet$getText() > library("plyr") > hilton.text=laply(hilton.tweets,function(t)t$getText()) > length(hilton.text) > head(hilton.text,5) # load list of positive and negative words for SIMPLE sentiment analysis # you would have to download the files from a website I included below - make sure you put in the directory that you will be # referencing > hu.liu.pos=scan('/Users/marcinkulakowski/Downloads/r/positive-words.txt',what='character',comment.char=';') > hu.liu.neg=scan('/Users/marcinkulakowski/Downloads/r/negative-words.txt',what='character',comment.char=';') > pos.words=c(hu.liu.pos,'upgrade') > neg.words=c(hu.liu.neg,'wtf','wait','waiting','epicfail','mechanical') # sampling > sample=c("You'reawesomeandIloveyou","Ihateandhateandhate.Soangry.Die!","Impressedandamazed:youarepeerlessinyourachievementofunparalleledmediocrity.") > score.sentiment = function(sentences, pos.words, neg.words, .progress='none') { require(plyr) require(stringr) # we got a vector of sentences. plyr will handle a list # or a vector as an "l" for us # we want a simple array ("a") of scores back, so we use # "l" + "a" + "ply" = "laply": scores = laply(sentences, function(sentence, pos.words, neg.words) { # clean up sentences with R's regex-driven global substitute, gsub(): sentence = gsub('[[:punct:]]', '', sentence) sentence = gsub('[[:cntrl:]]', '', sentence) sentence = gsub('\\d+', '', sentence) # and convert to lower case: sentence = tolower(sentence) # split into words. str_split is in the stringr package word.list = str_split(sentence, '\\s+') # sometimes a list() is one level of hierarchy too much words = unlist(word.list) # compare our words to the dictionaries of positive & negative terms pos.matches = match(words, pos.words) neg.matches = match(words, neg.words) # match() returns the position of the matched term or NA # we just want a TRUE/FALSE: pos.matches = !is.na(pos.matches) neg.matches = !is.na(neg.matches) # and conveniently enough, TRUE/FALSE will be treated as 1/0 by sum(): score = sum(pos.matches) - sum(neg.matches) return(score) }, pos.words, neg.words, .progress=.progress ) scores.df = data.frame(score=scores, text=sentences) return(scores.df) } > result=score.sentiment(sample,pos.words,neg.words) > class(result) [1] "data.frame" > result$score [1] 0 0 0 > hilton.scores=score.sentiment(hilton.text,pos.words,neg.words,.progress='text') > hilton.scores$hotel='Hilton' > hilton.scores$code='HL' > hist(hilton.scores$score) # hilton histogram > library("ggplot2") > qplot(hilton.scores$score) # qplot hilton # lets search for all other major hotels # Intercontinental intercontinental.tweets=searchTwitter('@intercontinental',n=1500) class(tweet) intercontinental.text=laply(intercontinental.tweets,function(t)t$getText()) intercontinental.scores=score.sentiment(intercontinental.text,pos.words,neg.words,.progress='text') intercontinental.scores$hotel='Intercontinental' intercontinental.scores$code='IC' # Wyndham wyndham.tweets=searchTwitter('@wyndham',n=1500) class(tweet) wyndham.text=laply(wyndham.tweets,function(t)t$getText()) wyndham.scores=score.sentiment(wyndham.text,pos.words,neg.words,.progress='text') wyndham.scores$hotel='Wyndham' wyndham.scores$code='WY' # Marriott marriott.tweets=searchTwitter('@marriott',n=1500) class(tweet) marriott.text=laply(marriott.tweets,function(t)t$getText()) marriott.scores=score.sentiment(marriott.text,pos.words,neg.words,.progress='text') marriott.scores$hotel='Marriott' marriott.scores$code='MI' # BestWestern bestwestern.tweets=searchTwitter('@bestwestern',n=1500) class(tweet) bestwestern.text=laply(bestwestern.tweets,function(t)t$getText()) bestwestern.scores=score.sentiment(bestwestern.text,pos.words,neg.words,.progress='text') bestwestern.scores$hotel='Bestwestern' bestwestern.scores$code='BW' # Starwood starwood.tweets=searchTwitter('@starwood',n=1500) class(tweet) starwood.text=laply(starwood.tweets,function(t)t$getText()) starwood.scores=score.sentiment(starwood.text,pos.words,neg.words,.progress='text') starwood.scores$hotel='Starwood' starwood.scores$code='SW' # Hyatt hyatt.tweets=searchTwitter('@hyatt',n=1500) class(tweet) hyatt.text=laply(hyatt.tweets,function(t)t$getText()) hyatt.scores=score.sentiment(hyatt.text,pos.words,neg.words,.progress='text') hyatt.scores$hotel='Hyatt' hyatt.scores$code='HY' > all.scores=rbind(intercontinental.scores,wyndham.scores,hilton.scores,marriott.scores,bestwestern.scores,starwood.scores,hyatt.scores) # Make separate plot for each hotel > ggplot(data=all.scores)+#ggplotworksondata.frames,always geom_bar(mapping=aes(x=score,fill=hotel),binwidth=1)+ facet_grid(hotel~.)+#makeaseparateplotforeachhotel theme_bw()+scale_fill_brewer()#plaindisplay,nicercolors # Plot > all.scores$very.pos=as.numeric(all.scores$score>=2) > all.scores$very.neg=as.numeric(all.scores$score twitter.df=ddply(all.scores,c('hotel','code'),summarise,pos.count=sum(very.pos),neg.count=sum(very.neg)) > twitter.df$all.count=twitter.df$pos.count+twitter.df$neg.count > twitter.df$score=round(100*twitter.df$pos.count/twitter.df$all.count) > install.packages("doBy") > library("doBy") > orderBy(~-score,twitter.df) hotel code pos.count neg.count all.count score 1 Bestwestern BW 6 0 6 100 5 Starwood SW 7 0 7 100 6 Wyndham WY 2 0 2 100 3 Hyatt HY 7 1 8 88 2 Hilton HL 15 3 18 83 4 Marriott MI 13 4 17 76 > install.packages("XML") > library(XML) > acsi.url='http://www.theacsi.org/index.php?option=com_content&view=article&id=147&catid=&Itemid=212&i=Hotels' # scrape acsi website for scores > acsi.df=readHTMLTable(acsi.url,header=T,which=1,stringsAsFactors=F) > acsi.df=acsi.df[,c(1,18)] > head(acsi.df,1) > colnames(acsi.df)=c('hotel','score') > acsi.df$score=as.numeric(acsi.df$score) > View(acsi.df) # ACSI Dataframe > acsi.df$code=c('HL','SW','MI','NA','HY','NA','IC','BW','NA','WY','NA','NA','NA') > acsi.df$score=as.numeric(acsi.df$score) > compare.df=merge(twitter.df,acsi.df,by='code',suffixes=c('.twitter','.acsi')) > compare.df=subset(compare.df,all.count>100) > compare.df=merge(twitter.df,acsi.df,by='code',suffixes=c('.twitter','.acsi')) > View(compare.df) # scores compared > ggplot(compare.df)+geom_point(aes(x=score.twitter,y=score.acsi,color=hotel.twitter),size=6)+ geom_smooth(aes(x=score.twitter,y=score.acsi,group=1),se=F,method="lm")+theme_bw()+opts(legend.position=c(0.85,0.85)) # final plot
Materials used:
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Jeffrey Breen’s presentation

The American Customer Satisfaction Index (Hotels)

Opinion Mining, Sentiment Analysis, Opinion Extraction