MATLAB: Do I get “You cannot add method folders (ones that start with ‘@’) or private folders to the MATLAB search path” error

MATLAB

I am trying to to add a folder to MATLAB's path, but get "You cannot add method folders (ones that start with '@') or private folders to the MATLAB search path" error.

Best Answer

It is possible that you are trying to add a folder named "private" or one that starts with "@" character.

These are reserved for class definition in MATLAB and therefore cannot be added to the path:

https://www.mathworks.com/help/matlab/matlab_oop/organizing-classes-in-folders.html

As a workaround, you can rename your folder

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MATLAB: Unable to add S-function to MATLAB path when using “addpath”

The commands you listed will not add the 'examples' folder located under 'apps' to the MATLAB path. This is because MATLAB R2016a does not implicitly add the path of the present working directory to the string arguments in "addpath", especially when you're trying to add subfolders. The commands you can use instead are as follows:

addpath(genpath([pwd '/apps/examples']));

addpath([pwd '/lib']);

addpath(genpath([pwd '/robots']));

Please note that in MATLAB R2016b, "addpath" implicitly adds the path of the present working directory. Therefore, the original commands would work in MATLAB R2016b.

MATLAB: Are .m files in a subfolder of a class folder considered methods of that class

Files in a subfolder of a class folder are not considered methods of the class.

Please refer to the following example:

@myClass > myClass.m:

classdef myClass
    methods
        function classObj = myClass()
            classObj.method1()
            classObj.method2()
        end
    end
end

@myClass > method1.m:

function method1(classObj)
    disp('method in class folder')
end

@myClass > subfolder > method2.m:

function method2(classObj)
    disp('method in subfolder')
end

-----

>> m = myClass
method in class folder

Unrecognized method, property or field 'method2' for class 'myClass'.

Error in myClass (line 5)

classobj.method2()

As you can see, 'method1' is part of the class, but 'method2', which is in a subfolder of '@myClass', is not treated as a method of the class.

For more details about using class folders in MATLAB, please see the following documentation page:

https://www.mathworks.com/help/matlab/matlab_oop/organizing-classes-in-folders.html

Best Answer

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MATLAB: Unable to add S-function to MATLAB path when using “addpath”

MATLAB: Are .m files in a subfolder of a class folder considered methods of that class

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