How to create a Matlab module

Question

B Verhaar 2018-5-1

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https://ww2.mathworks.cn/matlabcentral/answers/398355-how-to-create-a-matlab-module

移动：Walter Roberson 2023-1-9

afbeelding.png

Hi I'm trying to find out how to create a module in Matlab, that can be called using module.include() However I'm surprised to find out that I can't seem to find any official documentation about it. When I search in in mathworks.com, in the documentation, the first hit is even about Python modules ... (see screen shot). Does anyone know how to find this information? Thanks!

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Answer 1

Rajesh Balagam 2018-5-3

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https://ww2.mathworks.cn/matlabcentral/answers/398355-how-to-create-a-matlab-module#answer_318540

If you are referring to equivalent of Python modules in MATLAB, you can use packages. Refer to the following MATLAB documentation page for more information:

https://www.mathworks.com/help/matlab/matlab_oop/scoping-classes-with-packages.html

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B Verhaar 2018-5-7

Hi Walter

The evidence you requested, you can obtain by typing "help module" in the command window.

I would expect to find more extensive info (e.g. with an introduction to modules) somewhere in the Matlab documentation.

Walter Roberson 2018-5-7

编辑：Walter Roberson 2018-5-7

在 MATLAB Online 中打开

>> help module
module not found.
Use the Help browser search field to search the documentation, or
type "help help" for help command options, such as help for methods.

I do not have all of the toolboxes installed, but I have quite a number of them.

What shows up for

which -all module

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Answer 2

José Crespo Barrios 2019-7-12

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https://ww2.mathworks.cn/matlabcentral/answers/398355-how-to-create-a-matlab-module#answer_382960

编辑：José Crespo Barrios 2019-7-12

在 MATLAB Online 中打开

The fast roundabout I make to create a python-like module in matlab is to define a module-function with only two arguments: 1) str_function (string with the function inside the module to be called), and 2) cell_args (cell with the input arguments for that function). "resp" is the response to be exported by the module-function, and the functions inside it.

function resp = module_LoL(str_function, cell_args)
    if     strcmp(str_function,'myfun_1')
        resp = myfun_1(cell_args);
        
    elseif strcmp(str_function,'myfun_2')
        resp = myfun_2(cell_args);
        
    elseif strcmp(str_function,'myfun_3')
        resp = myfun_3(cell_args);
        
    end %endif str_function
end %endmod module_LoL
% functions inside module -------------------
function resp = myfun_1(cell_args)
    % arithmetic mean
    [input_1, input_2] = cell_args{:};
    
    resp    = (input_1 + input_2)/2;
end % endfun myfun_1
function resp = myfun_2(cell_args)
    % geometric mean
    [input_1, input_2] = cell_args{:};
    
    resp    = sqrt(input_1 * input_2);
end % endfun myfun_2
function resp = myfun_3(cell_args)
    % arithmetic-geometric mean: agm
    [a,g] = cell_args{:}; % [input_1,input_2]
    for ii = 1:10 % 10 iterations
        a = myfun_1({a,g});
        g = myfun_2({a,g});
    end %endfor
    
    resp = a;
end % endfun myfun_3

So that I can use the functions of this module outside, just by calling the head function-module as it would be a normal function (as a matter of fact it does).

value_1 = 2;
value_2 = 3;
am = module_LoL('myfun_1', {value_1, value_2})     % arithmetic mean
gm = module_LoL('myfun_2', {value_1, value_2})     % geometric mean
agm= module_LoL('myfun_3', {value_1, value_2})     % arithmetic-geometric mean

Besides that, the aspect is very nice inside the editor, because you can inspect every function inside the module with a single click in the proper panel of the editor, as shown in the next image,

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José Crespo Barrios 2019-7-14

Thank you for your contribution, very elegant. Just wanted to show didactically that it is no necessary to download special packages to have a kind of python-like module. It is just putting a head function and redirect to inner functions with "str_function" and "cell_args". Regards

ScubaNinjaDog 2023-1-9

Very Cool!

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Answer 3

Steven Lord 2018-5-7

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https://ww2.mathworks.cn/matlabcentral/answers/398355-how-to-create-a-matlab-module#answer_319050

I have access to a copy of the current release with all the products, and like Walter I cannot find any module function in them. I did a quick Google search and I found a submission on the File Exchange that may be what you're looking for. However, that doesn't have a function or method named "include" in it.

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Answer 4

Peeyush Prasad 2018-11-26

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https://ww2.mathworks.cn/matlabcentral/answers/398355-how-to-create-a-matlab-module#answer_1144512

移动：Walter Roberson 2023-1-9

Hi B.Verhaar,

After quite some head-scratching, I realized that 'Modules' is supplemental software(I think it is a toolbox) to manage the matlab search path. It needs to be installed on top of your regular Matlab installation, not sure if it comes in a 'full' installation. After installation, type 'Modules' on the cmdline, and a GUI pops open with all installed modules. Clicking on the 'Help' button reveals that it needs to be installed (see screenshot).

Also, 'which' returns the following:

>> which -all modules

C:\Users\peprasad.ASML-COM\AppData\Roaming\MathWorks\MATLAB\ModulesCache\732E09B121C82C10\R2018_10_02\Modules\Modules.m

so from the modules cache.

Hope that helps,

--Peeyush