How to get the file path inside a script, function, or model?

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ramesh - 2021-09-30T12:49:29+00:00
Question: How to get the file path inside a script, function, or model?

How can I get the path of the script or function being executed or model being run from inside the file itself?  

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  • How to get the file path inside a script, function, or model?

    • Expert Answer

    Profile picture of Prashant Kumar Prashant Kumar answered . 2025-11-20

    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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