Package Installation

Install the required packages.

• xml2: Xml2 is a wrapper around the comprehensive libxml2 C library that makes it easier to work with XML and HTML in R
  

• rvest: rvest helps you scrape information from web. pages.
  

• tibble: The tibble package provides utilities for handling tibbles, where “tibble” is a colloquial term for the S3 tbl_df class. The tbl_df class is a special case of the base data.frame.
  

library(xml2)
library(rvest)   ##very important
library(tibble)

• Storing the url of the first page of the table with data of about 100 movies in base_url:

base_url <- "https://www.the-numbers.com/movie/budgets/all"

• Scraping html content from the stored url:

base_webpage <- read_html(base_url)

• Now, as you can see here, after all/101 is present. Similarly, there are many more pages with 100 movies each in the table all with different urls.
  

So, should we store 100 urls for 100 pages for 10,000 movies? Ofcourse not! We have certain string formatting styles. You can visit the documentation here.

Hence, for strings, we use %s.

new_urls<- "https://www.the-numbers.com/movie/budgets/all/%s"

• Creating dataframe of the first 100 movies:
  • html_table(): converts html tables into dataframes.

table_base <- rvest::html_table(base_webpage)[[1]] %>% 
  tibble::as_tibble(.name_repair = "unique") # repair the repeated columns

• Creating dataframe of the next set of movies:

#creating two empty dataframes
table_new <-data.frame()
df <- data.frame()

#iterator
i<-101

#it loops through 5501 times so as to extract and then store and then combine about 5000 movies so far extracted.
while (i<5502) {
  new_webpage<- read_html(sprintf(new_urls,i))
  table_new <- rvest::html_table(new_webpage)[[1]] %>% 
    tibble::as_tibble(.name_repair = "unique") # repair the repeated columns
  df<- rbind(df,table_new)
  i=i+100
}

• Merge the table_base and df:

df_movies <- merge(table_base,df, all = T)

• Let us see how are dataframe looks exactly:

head(df_movies)
##    ...1  ReleaseDate                              Movie ProductionBudget
## 1     1 Apr 23, 2019                  Avengers: Endgame     $400,000,000
## 2 1,000 Apr 28, 2000 The Flintstones in Viva Rock Vegas      $58,000,000
## 3 1,001  Apr 4, 2008                       Leatherheads      $58,000,000
## 4 1,002 Mar 22, 2017                               Life      $58,000,000
## 5 1,003 Dec 18, 2009    Did You Hear About the Morgans?      $58,000,000
## 6 1,004 Dec 12, 2008         Che, Part 1: The Argentine      $58,000,000
##   DomesticGross WorldwideGross
## 1  $858,373,000 $2,797,800,564
## 2   $35,231,365    $59,431,365
## 3   $31,373,938    $41,348,628
## 4   $30,234,022   $100,929,666
## 5   $29,580,087    $80,480,566
## 6    $1,802,521    $31,627,370

Viola! We have accomplished our task.

• Now if you want, you can create a csv file of this dataframe for physically storing it in your system using:

write.csv(df_movies,"moviesData_tutorial.csv")