Exploring the Yelp Dataset

file_name <- 'E:/Khole/Downloads/business1.json'
business<-jsonlite::stream_in(textConnection(readLines(file_name, n=300000)), flatten = TRUE)

 Found 1 records...
 Imported 1 records. Simplifying...

file_name <- 'E:Khole/Downloads/review1.json'
review<-jsonlite::stream_in(textConnection(readLines(file_name, n=280984)), flatten = TRUE)

 Found 1 records...
 Imported 1 records. Simplifying...

##check data types
glimpse(business)

Rows: 50,000
Columns: 58
$ business_id                           <chr> "K0i8UwxEYFv8mqHl7jAkrg", "o7cEZApxvuyaWpHI1d-_cg", "4nJWUXQqm8vxubgC_0AcCQ", "psKq1NDfgIoON5DAXwuTlg",~
$ name                                  <chr> "Any Lab Test Now Glendale", "Cantine Poincaré", "Big Moe's Burgers", "Apple Store", "Gourmand's", "Que~
$ address                               <chr> "18205 N 51st Ave, Ste 143", "1071 Boul St-Laurent", "3517 Kennedy Road", "3265 W Market St", "5345 Can~
$ city                                  <chr> "AZ", "Montréal", "Scarborough", "Akron", "Valley View", "Henderson", "Calgary", "Phoenix", "Phoenix", ~
$ state                                 <chr> "AZ", "QC", "ON", "OH", "OH", "NV", "AB", "AZ", "AZ", "NC", "ON", "AZ", "AZ", "AB", "NV", "NC", "QC", "~
$ postal_code                           <chr> "85308", "H2Z 1J6", "M1V 4S4", "44333", "44125", "89074", "T2G 0X5", "85034", "85022", "28213", "M5C 2G~
$ latitude                              <dbl> 33.6523, 45.5085, 43.8230, 41.1560, 41.4151, 36.0358, 51.0425, 33.4361, 33.6068, 35.2949, 43.6507, 33.6~
$ longitude                             <dbl> -112.1683, -73.5603, -79.3064, -81.6377, -81.6322, -115.0877, -114.0630, -111.9950, -112.0657, -80.7475~
$ stars                                 <dbl> 4.0, 4.0, 3.0, 2.0, 4.5, 2.0, 4.0, 1.5, 4.5, 4.0, 4.0, 4.0, 5.0, 3.5, 4.0, 3.5, 3.5, 5.0, 4.0, 3.5, 3.0~
$ review_count                          <int> 4, 7, 87, 4, 82, 74, 5, 698, 13, 4, 36, 23, 13, 3, 48, 7, 24, 60, 11, 3, 8, 5, 8, 9, 3, 5, 3, 30, 5, 9,~
$ is_open                               <int> 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1~
$ categories                            <chr> "Diagnostic Services, Laboratory Testing, Health & Medical", "Breweries, Food, Gastropubs, Brewpubs, Re~
$ attributes.BusinessAcceptsCreditCards <chr> "True", NA, NA, NA, "True", "True", NA, NA, "True", "True", NA, "True", NA, NA, "True", "True", NA, "Tr~
$ attributes.BikeParking                <chr> NA, NA, "True", "False", "True", NA, NA, NA, "True", NA, NA, NA, NA, NA, "False", NA, "True", NA, NA, N~
$ attributes.GoodForKids                <chr> NA, NA, "True", NA, "True", NA, NA, NA, NA, "True", NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA,~
$ attributes.BusinessParking            <chr> NA, NA, "{'garage': False, 'street': False, 'validated': False, 'lot': True, 'valet': False}", NA, "{'g~
$ attributes.RestaurantsPriceRange2     <chr> NA, NA, "1", "2", "1", NA, NA, NA, "2", "2", NA, NA, NA, NA, "3", "1", "2", NA, NA, NA, "2", NA, "1", "~
$ attributes.WiFi                       <chr> NA, NA, "u'no'", NA, "u'no'", NA, NA, "u'free'", NA, NA, "u'free'", NA, NA, NA, NA, NA, NA, NA, NA, NA,~
$ attributes.RestaurantsAttire          <chr> NA, NA, "u'casual'", NA, "u'casual'", NA, NA, NA, NA, "'casual'", NA, NA, NA, NA, NA, NA, NA, NA, NA, N~
$ attributes.RestaurantsTakeOut         <chr> NA, NA, "True", NA, "True", NA, NA, NA, NA, "True", NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA,~
$ attributes.NoiseLevel                 <chr> NA, NA, "u'average'", NA, "'average'", NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, "u'loud'", NA, NA, N~
$ attributes.RestaurantsReservations    <chr> NA, NA, "False", NA, "False", NA, NA, NA, NA, "True", NA, NA, NA, NA, NA, NA, "False", NA, NA, NA, NA, ~
$ attributes.RestaurantsGoodForGroups   <chr> NA, NA, "False", NA, "False", NA, NA, NA, NA, "True", NA, NA, NA, NA, NA, NA, "True", NA, NA, NA, NA, N~
$ attributes.HasTV                      <chr> NA, NA, "True", NA, "True", NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, "True", NA, NA, NA, NA, NA, NA,~
$ attributes.Alcohol                    <chr> NA, NA, "u'none'", NA, "'beer_and_wine'", NA, NA, NA, NA, "u'full_bar'", NA, NA, NA, NA, NA, NA, "u'ful~
$ attributes.RestaurantsDelivery        <chr> NA, NA, "False", NA, "False", NA, NA, NA, NA, "False", NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, ~
$ attributes.OutdoorSeating             <chr> NA, NA, "False", NA, "False", NA, NA, NA, NA, "True", NA, NA, NA, NA, NA, NA, "True", NA, NA, NA, "Fals~
$ attributes.Caters                     <chr> NA, NA, "False", NA, "True", NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, "False", NA, N~
$ attributes.Ambience                   <chr> NA, NA, "{'romantic': False, 'intimate': False, 'classy': False, 'hipster': False, 'divey': False, 'tou~
$ attributes.RestaurantsTableService    <chr> NA, NA, NA, NA, "False", NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA~
$ attributes.GoodForMeal                <chr> NA, NA, NA, NA, "{'dessert': False, 'latenight': False, 'lunch': True, 'dinner': False, 'brunch': False~
$ attributes.ByAppointmentOnly          <chr> NA, NA, NA, NA, NA, "False", NA, NA, "False", NA, NA, NA, "True", "False", "False", NA, NA, "False", NA~
$ attributes.AcceptsInsurance           <chr> NA, NA, NA, NA, NA, "True", NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, "True", NA, NA, NA, NA, NA, NA,~
$ attributes.BusinessAcceptsBitcoin     <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, "False", NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA~
$ attributes.DogsAllowed                <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, "False", NA, NA, NA, NA, NA, NA, NA, NA, NA~
$ attributes.HappyHour                  <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, "True", NA, NA, NA, NA, NA, NA, NA, NA,~
$ attributes.WheelchairAccessible       <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, "True", NA, NA,~
$ attributes.DriveThru                  <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA,~
$ attributes.GoodForDancing             <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA,~
$ attributes.CoatCheck                  <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA,~
$ attributes.Music                      <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA,~
$ attributes.Corkage                    <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA,~
$ attributes.BYOBCorkage                <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA,~
$ attributes.HairSpecializesIn          <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA,~
$ attributes.BestNights                 <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA,~
$ attributes.Smoking                    <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA,~
$ attributes.BYOB                       <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA,~
$ attributes.AgesAllowed                <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA,~
$ attributes.DietaryRestrictions        <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA,~
$ attributes.RestaurantsCounterService  <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA,~
$ attributes.Open24Hours                <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA,~
$ hours.Monday                          <chr> "8:0-18:0", NA, "11:0-22:0", NA, "6:30-15:0", "6:0-17:0", NA, "4:0-0:0", "8:30-18:0", NA, NA, "0:0-0:0"~
$ hours.Tuesday                         <chr> "8:0-18:0", NA, "11:0-22:0", NA, "6:30-15:0", "6:0-17:0", NA, "4:0-0:0", "8:30-18:0", NA, NA, "0:0-0:0"~
$ hours.Wednesday                       <chr> "8:0-18:0", NA, "11:0-22:0", NA, "6:30-15:0", "6:0-17:0", NA, "4:0-0:0", "8:30-18:0", NA, NA, "0:0-0:0"~
$ hours.Thursday                        <chr> "8:0-18:0", NA, "11:0-22:0", NA, "6:30-15:0", "6:0-17:0", NA, "4:0-0:0", "8:30-18:0", NA, NA, "0:0-0:0"~
$ hours.Friday                          <chr> "8:0-18:0", NA, "11:0-0:0", NA, "6:30-15:0", "6:0-17:0", NA, "4:0-0:0", "8:30-18:0", NA, NA, "0:0-0:0",~
$ hours.Saturday                        <chr> "9:0-14:0", NA, "11:0-0:0", NA, NA, NA, NA, "4:0-0:0", "8:30-17:0", NA, NA, "0:0-0:0", NA, "10:0-16:0",~
$ hours.Sunday                          <chr> NA, NA, "12:0-21:0", NA, NA, NA, NA, "4:0-0:0", NA, NA, NA, "0:0-0:0", NA, NA, NA, NA, "10:0-3:0", NA, ~

### Let's examine the structure of certain columns
### We will ignore anything with "hours" or "attribute" it's the name
business %>%
select(-starts_with("hours"), -starts_with("attribute"))

### Let's count how many restaurants there are
### We will detect the term "Restaurant" using the str_detect function then retain (using "filter")only the rows that have the term restaurant.
business %>%
 select(-starts_with("hours"), -starts_with("attribute")) %>%
 filter(str_detect(categories, "Restaurant"))

### Let's examine rows in the Categories that have the term restaurant 
### Show the full list of restaurants in the categories column
business %>%
 select(categories) %>%
 filter(str_detect(categories, "Restaurant"))

#*Lets separate the items in the categories list and put each item on a separate row
#we will then display the name of each restaurant and their categories in separate rows
business %>%
 filter(str_detect(categories, "Restaurant")) %>%
 mutate(categories=str_split(categories, ",")) %>% ## Split the elements where there is a comma.This will create a list
 unnest(categories)%>%## Place each list element onto a separate row
 select(name, categories)

###*We would like to group and count the number of different categories associated with restaurants. Notice that there is a space before some of the categories
###This may be problematic if we try to group and count the observations.
###Let's remove all unnecessary spaces
business %>%
 filter(str_detect(categories, "Restaurant")) %>%
 mutate(categories=str_split(categories, ",")) %>%
 unnest(categories)%>%
 select(name, categories) %>%
 mutate(categories=str_trim(categories))%>% ## create a new variable called categories and remove whitespace from start and end of categories
 mutate(categories=str_squish(categories)) ##create a new variable called categories and reduce repeated whitespace inside a string.

### *Let's count the number of different categories associated with restaurants and arrange them from most to least
business %>%
 filter(str_detect(categories, "Restaurant")) %>%
 mutate(categories=str_split(categories, ",")) %>%
 unnest(categories)%>%
 select(name, categories) %>%
 mutate(categories=str_trim(str_squish(categories))) %>%
 count(categories)%>% ## count the unique values in the categories column
 arrange (desc(n)) ##sort (in descending order) a data frame by the number of items is each category

###Let's see which are the most popular types of categories in each state or province
###We will filter out the words "Restaurant" and "Food" since those are likely to be common for all the establishments
business %>% 
  select(-starts_with("hours"), -starts_with("attribute")) %>%
 filter(str_detect(categories, "Restaurant")) %>%
 mutate(categories=strsplit(categories, ",")) %>%
 unnest(categories)%>%
 select(name, categories) %>%
 mutate(categories=str_trim(str_squish(categories))) %>%
filter (!categories %in% c("Restaurants", "Food")) %>% ## filter out multiple categories i.e. Restaurants and Food
 count(categories)%>%
 arrange(desc(n))

### Now let's answer the following questions

##1. Show the number of different categories other than Restaurants and food, in each state/province ?


business %>%
## filter(str_detect(categories, "Restaurant")) %>%
 mutate(categories=strsplit(categories, ",")) %>%
 unnest(categories)%>%
 select(state, categories) %>%
 mutate(categories=str_trim(str_squish(categories))) %>%
 filter (!categories %in% c("Restaurants", "Food")) %>% ##filter out multiple categories
 group_by(state,categories)%>%
 count(categories)%>%
 arrange(state,desc(n))

##2. How many establishments are there in each state that have the word Restaurants as one of their categories?
business %>%
 filter(str_detect(categories, "Restaurant")) %>%
 mutate(categories=strsplit(categories, ",")) %>%
 unnest(categories)%>%
 select(state, categories) %>%
 mutate(categories=str_trim(str_squish(categories))) %>%
 filter(categories =="Restaurants") %>%
 group_by(state,categories)%>%
 count(categories)%>%
 arrange(desc(n))

#let's pivot the categories column and create a new wider dataset called business_wider that has categories as columns i.e dummyy variables from the categories column

business_wide<-business%>%
       mutate(categories = strsplit(categories, ", ")) %>%
     unnest(categories) %>% 
     arrange(categories) %>%  
     pivot_wider(names_from = categories,
            names_prefix = "categories_",
            names_repair = "universal", 
            values_from = categories, 
            values_fill = 0, 
            values_fn = length)

New names:
* `categories_& Probates` -> categories_..Probates
* `categories_3D Printing` -> categories_3D.Printing
* `categories_Acai Bowls` -> categories_Acai.Bowls
* `categories_Acne Treatment` -> categories_Acne.Treatment
* `categories_Active Life` -> categories_Active.Life
* ...

##2. How many establishments are there in each state that have the word Restaurants as one of their categories?

business_wide%>%
  filter(categories_Restaurants==1)%>%
  select(name, state )%>%
group_by(state)%>%
count(state)%>%
arrange(desc(n))

#3.How many records are there for each state/Province
business_wide%>%
  select(name, state )%>%
group_by(state)%>%
count(state)%>%
arrange(desc(n))

#4. How many establishment are open
  business_wide%>%
  select(is_open) %>%
  count(is_open)%>%
  group_by(is_open)%>%
  arrange(desc(n))

## 5. How many establishments are open and how many are closed in each state. Sort ascending by state and whether or not they are open

business_wide %>%
   select(state, is_open) %>%
  group_by(state, is_open)%>%
  count(is_open)%>%
  arrange(state,desc(is_open))

## 6. Show the top 10 states in terms of median star review scores. Organize them in descending order
business_wide %>%
  type_convert(cols(stars = col_double()))%>% ##convert the stars column to a double
  select(state,stars) %>%
  group_by(state)%>%
  summarize(Stars=median(stars))%>%
  arrange(desc(Stars))%>%
  head(10)

##7. Show the bottom 5 states in terms of median star review scores. Also show the median number of review scores that they have received
business_wide %>%
  type_convert(cols(stars = col_double(), review_count = col_integer()))%>% ##convert the stars column to a double
   select(state,review_count, stars) %>%
  group_by(state)%>%
  summarize(Median_Stars=median(stars), Number_of_Reviews=median(review_count))%>%
  arrange(Median_Stars)%>%
  head(5)

##8. Show the establishments with the most number of 5 star reviews (top 5)
review %>%
  filter(stars == 5) %>%
  group_by(business_id) %>%
  summarise(Count = n()) %>%
  arrange(desc(Count)) %>%
  head(5)%>%
inner_join(business_wide)

Joining, by = "business_id"

### 9. Which 5 business appears the most number of times in the data set. Order the businesses by the number of time they appear
business_wide %>%
  group_by(name)%>%
  summarise(Count = n()) %>%
  arrange(desc(Count))%>%
  head(5)

## Let's analyze Starbucks  given that it the most popular company in the dataset
### we will create a new tibble called StarbucksJoined_tbl that has all the Starbucks business data and their reviews
starbucksbusiness=business %>%
  filter(name=="Starbucks")
StarbucksJoined_tbl <-tibble( inner_join(starbucksbusiness,review))

Joining, by = c("business_id", "stars")

#10. Show the number of Starbucks in each State
StarbucksJoined_tbl%>%
  group_by(state)%>%
  summarise(Count = n()) %>%
  arrange(desc(Count))

## 11. What is the number and percentage  of visitors to Yelp's site who find the reviews for Starbucks useful 
StarbucksJoined_tbl %>%
  group_by(useful) %>%
  summarise(Count = n()) %>%
  arrange(desc(Count)) %>%
  mutate(Percentage = round(Count/sum(Count)*100,2)) %>%
  head(10)

## 11. What is the number and percentage  of visitors to Yelp's site who find the reviews for Starbucks funny 
StarbucksJoined_tbl %>%
  group_by(funny) %>%
  summarise(Count = n()) %>%
  arrange(desc(Count)) %>%
  mutate(Percentage = round(Count/sum(Count)*100,2)) %>%
  head(10)

## 11. What is the number and percentage  of visitors to Yelp's site who find the reviews for Starbucks useful 
StarbucksJoined_tbl %>%
  group_by(cool) %>%
  summarise(Count = n()) %>%
  arrange(desc(Count)) %>%
  mutate(Percentage = round(Count/sum(Count)*100,2)) %>%
  head(10)

###Let's analyze the most negative reviews and the most positive reviews. What are customers from each group saying
### to identify the most negative and positive reviews we have to 1)assign sentiment scores to each review 2)sort the reviews scores
###1) assigning review scores and store the results in a data frame called CustomerSentiment
install.packages("textdata")
install.packages("textcat")
install.packages("tidytext")
library(textdata)
library(textcat)
library(tidytext)

get_sentiments("afinn")

CustomerSentiment<-StarbucksJoined_tbl %>%
  ## filter(textcat(text) == "english") %>% # considering only English text. Omit this line if you want faster processing.
  unnest_tokens(word, text) %>%  ##Split a text column into words/tokens
   anti_join(stop_words)%>%  #remove stopwords
   inner_join(get_sentiments("afinn"), by = "word") %>% # join the StarbucksJoined_tbl with the afinn lexicon which has 2 columns titled word and value 
   group_by(review_id) %>%
  summarize(sentiment = mean(value),words = n()) %>%
  filter(words >= 5) # we will exclude reviews with less than 5 words

Joining, by = "word"

###2) sort the reviews scores and display desired columns(i.e. address,city, date,sentiment,text)
#### Most Negative reviews
CustomerSentiment%>%
  arrange(desc(sentiment)) %>%
  top_n(-10, sentiment) %>%  ## get the lower sentiment scores
  inner_join(StarbucksJoined_tbl, by = "review_id") %>%
  select(address,city, date,sentiment,text)

#### Most Positive reviews
CustomerSentiment%>%
  arrange(desc(sentiment)) %>%
  top_n(10, sentiment) %>% ## get the highest sentiment scores
  inner_join(StarbucksJoined_tbl, by = "review_id") %>%
  select(address,city, date,sentiment,text)

library(lubridate)

### Let's add a formatted Date Column to StarbucksJoined_tbl
## We will use Lubridate reformat the date column ( which is currently stored as chr) and create new columns to multiple columns:
### date, month,day, year,hour
StarbucksDateFormatted<-StarbucksJoined_tbl%>%
 mutate(date_formatted = as_date(date),
 month_formatted=month(date),
 day_formatted=day(date),
 year_formatted=year(date),
 hour_formatted=hour(date))

### Now lets create some plots for Starbucks

###1. Show the number of reviews for Starbucks over time(years) using a line chart
StarbucksDateFormatted%>%
  select(year_formatted)%>%
  group_by (year_formatted)%>%
  summarise(NumberofReviews = n())%>%
  ggplot(aes (x=year_formatted,y=NumberofReviews)) +
  geom_line()

###2. Show the number of reviews by State using a column/bar chart
StarbucksDateFormatted%>%
  select(state)%>%
  group_by(state)%>%
  ggplot(aes (x=state)) +
  geom_bar()

###3. Create a donut chart that Shows the proportion of businesses that are open vs those that are closed
business %>%
 group_by(is_open) %>%
 summarise(Count = n())%>%
 mutate(is_open=as.factor(is_open), percentage = round(Count/sum(Count)*100,2), LabelPosition = cumsum(percentage)-.1*percentage) %>%
 ###plot the pie chart with geom_bar() and then convert the bar into pie with the coord_polar() function. to make a donut plot we must specify the x = 2 in aes() and add the xlim() as code 
 ggplot(
 aes(x = 2, y = percentage, fill = is_open))+
 geom_bar(stat = "identity")+
 coord_polar("y" ) +
 geom_text(aes(y = LabelPosition, label = paste(percentage,"%", sep = "")), col = "white") +
 theme_void() +
 scale_fill_brewer(palette = "Dark2")+
 xlim(.2,2.5)

##4. Create a column chart that shows the median number of words used in Starbucks reviews each month
StarbucksDateFormatted %>%
  mutate(NumberOfWords=str_count(text, boundary("word"))) %>% ## counts the number of words since boundary is set to word
  mutate(MonthName=month(ymd(date_formatted), label = TRUE)) %>%
  group_by(MonthName) %>%
  summarize(NumberOfWords=median(NumberOfWords)) %>%
  ggplot(aes (x=MonthName, y=NumberOfWords)) +
  geom_col() +
  coord_flip()

### 5. Create a chart that shows the relationship between funny and useful reviews of Starbucks.
StarbucksDateFormatted%>%
  ggplot(aes(x=funny, y=useful)) + 
  geom_point()+
  geom_smooth(method=lm)

### 6. Create a wordcloud to show the words that are used the most frequently in reviews

library(wordcloud)

Loading required package: RColorBrewer

createWordCloud = function(x)
{
  StarbucksDateFormatted %>%
    unnest_tokens(word, text) %>%
    
    filter(!word %in% stop_words$word, !word %in% 'starbucks') %>%
    ### filter(!word = 'starbucks') %>%
    count(word,sort = TRUE) %>%
    ungroup() %>%
    head(30) %>%
    with(wordcloud(word, n, max.words = 30,colors=brewer.pal(8, "Dark2")))
}

createWordCloud(review)

### 7.Sentiment Analysis : The Positive and negative words associate with Starbucks reviews

positiveWordsBarGraph <- function(SC) {
  contributions <- SC %>%
    unnest_tokens(word, text) %>%
    count(word,sort = TRUE) %>%
    ungroup() %>%
    
    inner_join(get_sentiments("afinn"), by = "word") %>%
    group_by(word) %>%
    summarize(contribution = sum(value), n=n())
  
  contributions %>%
    top_n(20, abs(contribution)) %>%
    mutate(word = reorder(word, contribution)) %>%
    head(20) %>%
    ggplot(aes(word, contribution, fill = contribution > 0)) +
    geom_col(show.legend = FALSE) +
    coord_flip() + theme_bw()
}

positiveWordsBarGraph(StarbucksJoined_tbl)

###8. Show all the Starbucks locations on a map
### we will use the starbucksbusiness data set that we created earlier because it does not have repeating reviews each record is unique
library(leaflet)
### this function will color each location based on the star rating it has
pal <- colorFactor(c("purple", "red", "orange", "black","blue"),
                   domain = unique(starbucksbusiness$stars))
### this draws the map
map <- leaflet(starbucksbusiness) %>%
  addProviderTiles("CartoDB.Positron") %>%
  addCircleMarkers(
    color = ~pal(starbucksbusiness$stars),
    stroke = FALSE, fillOpacity = 0.5,
    lat = starbucksbusiness$latitude,
    lng = starbucksbusiness$longitude,
    clusterOptions = markerClusterOptions(),
    popup = as.character(starbucksbusiness$address))
map

#Let's join the business and review tables so that we can create a dashboard
business_reviews <- inner_join(business,review)