Code Trace for MATLAB

Code traces for exploring and troubleshooting executing code
Updated 26 Oct 2022

Code Trace for MATLAB®

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Code Trace for MATLAB is a collection of functions for creating and manipulating code traces, which can be used to help understand what is happening in code as it executes. A code trace prints a brief note to the MATLAB Command Window whenever a specific line of code is executed. A code trace might just print the function name and line number, or it might also print a label and the value of variable or expression.

screen shot of displaying a function name and line number

screen shot of displaying a the value of variable

Basic Usage

Call addCodeTrace with the name of a MATLAB function or script file and the line number that you want to trace:


Then, call your function as your normally would:

out = myfunc(input1,input2);

See the script GettingStarted.mlx, in the doc folder, for examples.


Code Trace for MATLAB requires MATLAB release R2019b or newer.

Download the files to a folder on your computer, and place that folder on the MATLAB Search Path.


The license is available in the License file within this repository.

Community Support

MATLAB Central

Copyright 2022 The MathWorks, Inc.

Cite As

Steve Eddins (2024). Code Trace for MATLAB (, GitHub. Retrieved .

MATLAB Release Compatibility
Created with R2022b
Compatible with R2019b and later releases
Platform Compatibility
Windows macOS Linux
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Version Published Release Notes

See release notes for this release on GitHub:


To view or report issues in this GitHub add-on, visit the GitHub Repository.
To view or report issues in this GitHub add-on, visit the GitHub Repository.