How do I count the top 50 most duplicated words/phrases which appear in a pdf file?

Question

ChatGPT · Answer

To count the top 50 most duplicated words or phrases in a PDF file, you'll need to follow a series of steps that involve extracting text from the PDF, processing the text to count word or phrase occurrences, and then sorting the results. Below is a step-by-step guide using Python, which is a popular programming language for text processing.
Requirements
1. Python: Make sure you have Python installed on your system.
2. Libraries: You will need the following libraries:
   - [code]PyPDF2[/code] or [code]pdfplumber[/code] for extracting text from PDFs.
   - [code]collections[/code] for counting occurrences.
   - [code]nltk[/code] (optional) for advanced text processing.
You can install the necessary libraries using pip:
[code]pip install PyPDF2 pdfplumber nltk[/code]
Step-by-Step Guide
1. Extract Text from PDF: Use a library to read the PDF and extract text.
2. Process the Text: Normalize the text by converting it to lowercase, removing punctuation, and splitting it into words or phrases.
3. Count Occurrences: Use a dictionary or [code]Counter[/code] from the [code]collections[/code] module to count the occurrences of each word or phrase.
4. Sort and Display Results: Sort the counts and display the top 50.
Example Code
Here's an example of how you might implement this:
[code]import pdfplumber
from collections import Counter
import re

def extract_text_from_pdf(pdf_path):
    text = ''
    with pdfplumber.open(pdf_path) as pdf:
        for page in pdf.pages:
            text += page.extract_text() + ' '
    return text

def count_words(text, n=1):
    # Normalize text
    text = text.lower()
    # Remove punctuation and split into words/phrases
    words = re.findall(r'\b\w+\b', text)
    # Count occurrences
    return Counter(words).most_common(n)

def main(pdf_path):
    text = extract_text_from_pdf(pdf_path)
    
    # Count single words
    print("Top 50 words:")
    word_counts = count_words(text, 50)
    for word, count in word_counts:
        print(f"{word}: {count}")
    
    # Count phrases (for example, 2-word phrases)
    print("
Top 50 two-word phrases:")
    two_word_phrases = [' '.join(text.split()[i:i+2]) for i in range(len(text.split()) - 1)]
    phrase_counts = Counter(two_word_phrases).most_common(50)
    for phrase, count in phrase_counts:
        print(f"{phrase}: {count}")

if __name__ == "__main__":
    pdf_path = 'path/to/your/file.pdf'  # Update this to your PDF file path
    main(pdf_path)[/code]
Explanation of the Code
 * extract_text_from_pdf: This function opens the PDF file and extracts text from each page.
 * count_words: This function normalizes the text and counts the occurrences of each word using [code]Counter[/code].
 * main: This function orchestrates the process, counting both single words and two-word phrases.
Notes
 * Adjust the regular expression in [code]re.findall[/code] if you want to include or exclude certain characters.
 * You can modify the [code]n[/code] parameter in [code]count_words[/code] to count phrases of different lengths.
 * The example uses a simple method for extracting two-word phrases; you can expand this approach for longer phrases as needed.
This code provides a basic framework that you can customize further based on your specific needs!

Randy Lewis · Answer

I couldn't find a very valid method in PDF softwares that I have in my system right now, may be there is some, but am not sure about that. However, I would like to mention that you can do it in word document using various online word counter tools. So let me summarize the solution in few steps:

1) Convert your PDF file to word document, preferably using the Classic PDF converter(http://www.classicpdf.com/pdf-converter.html)
2) Once you convert your document to doc, you can then check the desired most repeated word through any online tool e.g http://www.wordcounter.com/.

I hope this will solve your problem, although with a bit lengthy process but the main theme is that its better to solve the issue through a lengthy process than to leave it unsolved.

Eric Fletcher · Answer

%3E How can I get a count of how many times I have used each word in a document?
You can use VBA to create a list of all words and their frequency. See the answers by Bob Beechey [ https://www.quora.com/profile/Bob-Beechey ] and Michael R. Worthington [ https://www.quora.com/profile/Michael-R-Worthington ] for sources of already-written VBA macros.

As an alternative that needs no programming, you can use Excel to give you a word count — but to do so, you need to use Word’s Find and Replace (F&R) to get rid of characters that are not parts of words, and get each word into its own paragraph.

The process below is pretty straightforward, but it can be tedious to be rigorous.

If you plan to do this frequently, consider recording a macro to do the Word steps. Start with a copy of your document.

1. To remove all characters that won’t be part of a word, use F&R to change punctuation marks, newline characters, manual page breaks, tabs etc. to a single space. You could change them to nothing, but that could result in words being appended together: “this…or that” would become “thisor that”. For characters and elements like section breaks or graphics, use the “Special” pulldown in the expanded F&R dialog to insert the appropriate codes (i.e. a section break is ^b; a graphic is ^g, etc.)
2. For punctuation, you could do a F&R for each punctuation mark, but it would be easier to do many at once with a wildcard expression: turn on the “Use wildcards” search option, and copy this: [.,;:“”—–-…] (this specifies “any of period, comma, semicolon, colon, open & closed quotes, em dash, en dash, hyphen, or ellipsis”). Leave the Replace with box empty to remove all of these characters.
3. To remove characters that have special meanings in wildcard expressions, you need to prefix each with the \ escape symbol, so copy this [\?\![\]\{\}] to remove any of ?, !, (, ), [, ], {, or } characters.
4. With “Use wildcards” turned off, change all ^w to ^p. This will change “white space” (any number of spaces, tabs, enters) to a single paragraph mark — and your document will now consist of a new paragraph for every word.
5. Finally, since you probably won’t care about formatting for the words, select everything and press Ctrl-Shift-n to remove any styles, and Ctrl-Spacebar to remove any character formatting.
6. Select everything and copy it to the clipboard.
Now switch to Excel, and use Paste Special %3E Text to insert each word from your document in a cell in column A.

Now sort the list alphabetically by selecting the column and using Sort A to Z. Items you may have overlooked (such as numbers or missed punctuation) will be sorted to the top, so you could choose to delete those rows.

To get a word count, you can use a Data function to get a list of unique words, and then use a CountIf formula to get a count of each unique word. Here’s how.

1. Select the sorted words (click on the first one, then Ctrl-DownArrow to select everything to the last one in the column). Use Formula %3EDefine Name to name the range of all of your words (for this example, I’ll use “AllWords” as the name). I generally add a column label with the same name for clarity.
2. Open the Data %3E Advanced Filter dialog. The list range will be what you selected above. Turn on the “Unique records only” setting, then click “Copy to another location” radio button and enter a cell address for the new list. Click OK to create a list of unique words.
3. In the cell left of the first word, enter a CountIf formula to count the number of that cell’s word within the full list of words. If the first unique word in cell C1, the formula would be =countif(AllWords,C1) and it would display the count of that word in the full list of words.
4. Now duplicate that formula down to the end of the unique word list. The adjacent cell will display each word’s count.
5. If you add a column header for each of the two columns, you can set them as Filters (Home %3E Sort & Filter %3E Filter) to be able to sort them by frequency, or filter them by various criteria (like top 10, %3E30, =12, etc.)
The screenshot below shows an Excel sheet showing the list in column A (labelled with the name “AllWords”). Column D shows the unique words, and the count for each shows in column E. The formula in cell E2 shows how the COUNTIF function displays the count. In this case, I’d used “Sort largest to smallest” for the Count filter. The word “The” was used 294 times in my sample document; “to” was used 142 times, etc.

Anonymous · Answer

The purpose of this question is to test your knowledge of data structures, more so than your abilities to script. In my opinion, the correct data structure to use in this instance is a Hash Table (http://en.wikipedia.org/wiki/Hash_table). I'm also making the assumption that while the list is unsorted, there is a way to decipher between different words (such as a space or special character).

You would iterate through the entire text file, and use each word as your key. For the value, you would increment by 1 for every time it is hit.

$words["apple"] = 5;

The time complexity of this is O(n), as eve

You would iterate through the entire text file, and use each word as your key. For the value, you would increment by 1 for every time it is hit.

$words["apple"] = 5;

The time complexity of this is O(n), as every word needs to be hit 1 time.

Just my 2cents on what I think they were looking for in an answer!

Samantha Kent · Answer

Method 1 of 2:Using Adobe Acrobat Reader

If you already have Acrobat Reader installed, ensure that you have the latest version. To do this, click "Check for Updates." If an update is available, click "Install." If no updates are necessary, proceed to the next step.

If you don't have Acrobat Reader, point your web browser to Download Adobe Acrobat Reader DC [ http://get.adobe.com/reader ]. Remove the checkmarks next to the two "Optional Offers" (McAfee Security and TrueKey), then click "Install Now." When the "Finish" button turns green, click it to complete the installation.

2. Open your PDF file in Acrobat Reader.

Double-click the PDF file to open it in your updated version of Acrobat Reader.

3. Make sure the document view is not set to Single Page View.

Open the View menu and select "Page Display." There should not be a check next to "Single Page View." If there is, remove it by clicking "Enable Scrolling." In order to select the entirety of the document (rather than just one page), this step is crucial.

4. Select all text in the document.

Click somewhere in the document, then press Ctrl+A (Windows) or ⌘ Command+A (Mac) to select all text in the document.

5. Copy the text.

Once the text is selected, you can copy it by pressing Ctrl+C (Windows) or ⌘ Command+C (Mac). Another way to do this is to open the Edit menu and select "Copy File to Clipboard."

6. Paste the text into another program.

To paste the text into another program, click where you'd like to add the text and press Ctrl+V (Windows) or Ctrl+V on Mac.

Method 2 of 2:Using Apple Preview
1. Open the PDF in Preview.

Double-click the PDF to open it in Preview. If the PDF opens in software other than Preview, drag the PDF file to the Preview icon in the dock.

2. Show the editing toolbar.

Click the Edit button (a small square with a pencil icon) to display the editing toolbar.

3. Allow continuous scrolling.

To ensure that all text in the document can be selected (not just the current page), click the View menu (the top left of the document, signified by a small box with a downward-facing arrow to its right) and place a check next to "Continuous Scroll."

4. Select all text in the document.

First, enable text selection by clicking the editing toolbar icon signified by the letter A next to a cursor. Now, click somewhere in the document, then press ⌘ Command+A to select all text in the document.

To copy the selected text, press ⌘ Command+C.

To paste the selected text into another document, click in the desired paste location and press ⌘ Command+V.

Bob Beechey · Answer

If you want to create a word frequency list from a Word document, the excellent Allen Wyatt of Tips.Net [ http://Tips.Net ] has created a useful macro to be found at

Generating a Count of Word Occurrences [ http://wordribbon.tips.net/T010761_Generating_a_Count_of_Word_Occurrences.html ]

Nicholas Blake · Answer

The answer is in the question. Select the page then do your find and replace.

Chris Atkins · Answer

I could do this in a Unix/Linux shell script and in Excel but it would be tedious work (and I’m not offering to do it for you unless you’re offering a LOT of money), but I would imagine one of the many writing-aid packages (Grammarly, or similar) could also probably do this, these days - have you done an online search before posting this question?

Charliss Green · Answer

How do I count the repetitions of words in text?

Depends on where the text appears.

• Online = FIND in Page
 • In MS Word = the FIND function also displays a COUNT

Vincent Pothier · Answer

Do a CTRL+F on the target text in question. TYPE THE LETTER IN QUESTION into the search input box and it will indicate how often that letter occurs.

You can also Copy and paste the text into a plain text editor like Notepad. Do a find/count for the letter.

Anonymous · Answer

If you’re using Microsoft Word, underline the word you want to search for, go to Find / . A navigation window opens, enter the word/ press enter. The search will locate the word in the order that it appears in the document.

Henry W. Harya · Answer

The hardest part is probably reading the PDF converting it's contents to a series of words. So, strip out things like punctuation, and control/formatting elements, then all you have to do is put each word into a dictionary and count their occurrences.

I did a quick Google... And you have a lot of options for PDF readers, so pick one that suits your purposes. I notice that pdfminer3k is available through a quick pip install, though I don't vouch for it's usefulness. You strike me as a Windows user, so use the command prompt and type

[code]C:\pip install pdfminer3k
[/code]Now, the real challenge is if you want to count word tenses like "ran" and "run" as a single word, or "car" and "cars". But that's a different question.

James Butts · Answer

Word has a “Replace All” tool. It is located on the Home tab. Just click the “Replace” button, and one of the options is “Replace All.”

Binh Nguyen · Answer

For just thousands of words, hash table is probably the fastest way! But if it's million/billion of words then trie [1] should be better.

Also, if you know that this is a perfect example of MapReduce's application then it would be a great answer!

[1] http://en.wikipedia.org/wiki/Trie

Terri Swanson · Answer

It depends of the type of the PDF.

If it’s a searchable PDF, any decent PDF viewer will allow you to easily search words in it. For example, you can open the PDF in Google Chrome and use Chrome’s search feature to find the word.

When it comes to a scanned or image-based PDF, things will be a bit complicated. You need to use OCR software to make the PDF content searchable. Professional OCR software like Cisdem PDF Converter OCR for Mac can let you easily OCR PDFs and images with high accuracy. The app can also help you convert the OCRed PDF to any popular format you may need such as Word, Excel, PowerPoint, text, EPUB and more. Also, it works with both native searchable PDFs and scanned/image-based PDFs.

Anonymous · Answer

Ok.good question.
Use http downloader (free) or http grabber to download all files and then use notepad plus plus to count frequency.
To do it programatically you need website access or even you can use a bot like program.but it will count only public files(like pages listed in a sitemap or pages linked to other page(s) in one or other way)

James Miller ✪ · Answer

PDF is a very popular document format that is used in almost every kind of personal and professional documentation. A number of times we would like to find one or more word in a PDF document. In order to do so you would need a PDF software.

The popular software programs that can be used for searching any word in PDF are Wondershare PDFelement, Adobe Acrobat DC, Google Chrome Browser and Mac Preview App. If your PDF is not searchable then you can convert it to a searchable PDF with the help of Wondershare PDFelement.

It is a powerful PDF software for performing all kinds of basic and advanced operations on PDF files. You can easily perform OCR on a PDF document to convert it to searchable PDF. Once the PDF is converted to searchable PDF, you can easily search any word in it.

In order to practically learn the process, simply watch the below video tutorial. In this tutorial video, you will learn the process to search word in PDF using Wondershare PDFelement, Adobe Acrobat DC, Google Chrome Browser and Mac Preview App. Good luck.

https://www.youtube.com/watch?v=WHr7hUTgf3E

Barry Stanly · Answer

There are two PDF formats: Searchable and non-searchable. If the PDF is searchable, just press %3CCtrl%3EF in Acrobat reader (or other PDF reader.) If the PDF is not searchable, you have to run it through an Optical Character Reader (OCR) to convert it to searchable format. Some ways of doing that are:

1. Print the PDF and then scan it back in using a scanner. Specify searchable format. (Ugly, but works.)
2. If you have the software, directly convert the PDF to searchable format using an OCR. These exist, but they may cost money.
3. There are on-line services that will scan a document and convert it searchable format.

Anonymous · Answer

Why reinvent the wheel? Open the file in Windows and use Ctrl-F to search.

Oh, you want to scan thousands of files to gather statistics? Plenty of word search freeware available for download, or more powerful tools like Google Ngram Viewer - Wikipedia [ https://en.wikipedia.org/wiki/Google_Ngram_Viewer ]

Or maybe you’re lazy and this is your student class assignment? You’ll learn more if you figure it out for yourself than if I give you a ‘how-to’ outline.

Jonathan Wright · Answer

Little effort to get the answer.

Note: If this was on Windows, I'd install msysgit (http://code.google.com/p/msysgit/) and use it's environment to do the processing. msysgit is a great little Linux-style environment for windows. It is intended as just git + all the command line tools needed to run git, but in practice it is kept up to date, great for other uses and less hassle than cygwin or unxutls.