Question
How can I get the path of the script or function being executed or model being run from inside the file itself?
Expert Answer
Prashant Kumar
PhD Expert
Answered Aug 29, 2026
For scripts and functions:
[filepath,~,~] = fileparts(mfilename('fullpath'))
or simply
filepath = fileparts(mfilename('fullpath'))
Note:
-This works with M file scripts and functions during normal execution.
-This will not produce the desired result for MLX live scripts or in "%%" sections of scripts run individually.
-The functions used are not supported for code generation.
For live scripts (or "%%" sections of scripts):
[filepath,~,~] = fileparts(which('your_file_name'))
or simply
filepath = fileparts(which('your_file_name'))
Note:
-This requires manually entering the name of the file into 'your_file_name'.
-The more flexible approach which works for M file scripts and functions using 'mfilename' returns incorrect results for MLX live scripts and "%%" sections of scripts run individually.
-The functions used are not supported for code generation.
For Simulink models:
[path,~,~] = fileparts(which(bdroot))
or simply
path = fileparts(which(bdroot))
Note:
-This can be used in Model Callbacks, Block Callbacks, Mask Initialization, and Mask Icon & Ports.
-Using "gcs" in place of "bdroot" will not give the desired result in some circumstances, for example Block Callbacks inside subsystems.
-The functions used are not supported for code generation.
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