Truncate file

Version 1.0.0 (1.91 KB) by Dan Dolan
This function uses a Perl script to truncates a file to a specified number bytes without creating a second copy.
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Updated 20 Nov 2025

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Have you ever needed to trim an existing file? MATLAB cannot do this natively without creating a new file, copying the bytes to be kept, and then deleting the original. This function uses a Perl script, which MATLAB can invoke from any* platform without compliation.
*I have not tested MATLAB Mobile.

Cite As

Dan Dolan (2025). Truncate file (https://www.mathworks.com/matlabcentral/fileexchange/182650-truncate-file), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2025b
Compatible with any release
Platform Compatibility
Windows macOS Linux
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Acknowledgements

Inspired by: FileResize

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Version Published Release Notes
1.0.0