Extract data from a huge file using matlab

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  • Thread starter Thread starter Monica_xinchi
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SUMMARY

To extract data from a large text file containing 20,000 lines with mixed content using MATLAB, users can utilize the built-in import functionality. By locating the file in the MATLAB file browser and right-clicking to select import, a dialog will appear to customize the data import process. Recent versions of MATLAB automatically generate an M-file for the import, facilitating the repetition of this procedure for similar files without manual intervention.

PREREQUISITES
  • Familiarity with MATLAB interface and file browser
  • Understanding of MATLAB M-files and scripting
  • Basic knowledge of data types in MATLAB (numbers, strings, characters)
  • Experience with handling text files in programming
NEXT STEPS
  • Explore MATLAB's data import tools and options
  • Learn how to create and edit M-files in MATLAB
  • Investigate data manipulation techniques in MATLAB for further processing
  • Study MATLAB's file I/O functions for advanced data handling
USEFUL FOR

Data analysts, MATLAB users, and programmers looking to efficiently extract and process data from large text files.

Monica_xinchi
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extract data from a "huge" file using matlab

hi guys,
I need some help!
I have a file(.txt) which concludes about 20,000 lines. There are not only number data but also letters and different characters in the file. I want to extract some certain useful data from this file and put them into a calculation program.

could you guys please write a .m file for me?
 
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Matlab should handle this for you automatically. Locate the file in the Matlab file browser, right-click on it, and import it. A dialog will pop up that allows you to specify precisely how Matlab imports the data; as an added bonus, recent versions of Matlab also allow you to specify that it should automatically generate an M-file for the import, allowing you quickly to repeat the procedure on similar files without having to use the import dialog.
 

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