pdftoimage

Running R on Jupyter Notebook with R Kernel (No Anaconda)

A simple guide to install R Kernel on Jupyter Notebook (Windows).  Do not need Anaconda.

  1. Objectives:
      1. Install R Kernel on Jupyter Notebook (Windows)
  2. Required Tools:
      1. R for windows— R for windows
      2. JupyterNotebook — Jupyter Notebook
  3. Steps:
      1. Install R. Use the R terminal (do not use R studio) to install R packages:
        • install.packages(c(‘repr’, ‘IRdisplay’, ‘evaluate’, ‘crayon’, ‘pbdZMQ’, ‘devtools’, ‘uuid’, ‘digest’))
        • install.packages(‘IRkernel’)
      2. Make Kernel available to Jupyter
        • IRkernel::installspec()
        • OR IRkernel::installspec(user = FALSE) #install system-wide
      3. Open a notebook and open new R script.


Further notes 


    

  • After getting Additional R library might be hard to install inside the Notebook. For workaround, install desired library in R terminal then open the Notebook.
    • 

  • If need to use R.exe on windows command terminal, ensure R.exe is on path. [likely location: C:\R\R-2.15.1\bin]
    • 

  • ggplot tutorial
    • 



References:



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Convert PDF pages to text with python

			


												
								

					
A simple guide to text from PDF. This is an extension of the Convert PDF pages to JPEG with python post


    

  1. Objectives:

      

    1. 

        

      1. Extract text from PDF
        2. 

      2. 

      

      2. 

    

    2. 

  2. Required Tools:

      

    1. 

        

      1. Poppler for windows— Poppler is a PDF rendering library . Include the pdftoppm utility
        2. 

      2. Poppler for Mac — If HomeBrew already installed, can use brew install Poppler
        3. 

      3. pdftotext— Python module. Wraps the poppler pdftotext utility to convert PDF to text.
        4. 

      4. 

      

      2. 

    

    3. 

  3. Steps:

      

    1. 

        

      1. Install Poppler. For windows, Add “xxx/bin/” to env path
        2. 

      2. pip install pdftotext
        3. 

      

      2. 

    

    4. 



Usage (sample code from pdftotext github)


import pdftotext

# Load your PDF
with open("Target.pdf", "rb") as f:
    pdf = pdftotext.PDF(f)

# Save all text to a txt file.
with open('output.txt', 'w') as f:
    f.write("\n\n".join(pdf))




Further notes 



See also:


									

			
			








			
	
			


				
				
Convert PDF pages to JPEG with python

			


												
								

					
A simple guide to extract images (jpeg, png) from PDF.


    

  1. Objectives:

      

    1. 

        

      1. Extract Images from PDF
        2. 

      2. 

      

      2. 

    

    2. 

  2. Required Tools:

      

    1. 

        

      1. Poppler for windows— Poppler is a PDF rendering library . Include the pdftoppm utility
        2. 

      2. Poppler for Mac — If HomeBrew already installed, can use brew install Poppler
        3. 

      3. Pdf2image— Python module. Wraps the pdftoppm utility to convert PDF to a PIL Image object.
        4. 

      4. 

      

      2. 

    

    3. 

  3. Steps:

      

    1. 

        

      1. Install Poppler. For windows, Add “xxx/bin/” to env path
        2. 

      2. pip install pdf2image
        3. 

      

      2. 

    

    4. 



Usage


import os
import tempfile
from pdf2image import convert_from_path

filename = 'target.pdf'

with tempfile.TemporaryDirectory() as path:
     images_from_path = convert_from_path(filename, output_folder=path, last_page=1, first_page =0)

base_filename  =  os.path.splitext(os.path.basename(filename))[0] + '.jpg'      

save_dir = 'your_saved_dir'

for page in images_from_path:
    page.save(os.path.join(save_dir, base_filename), 'JPEG')



Further notes