how do we write a code on similar lines to the matlab inbuilt functions

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SHANTANU KSHIRSAGAR 2020-4-15

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https://ww2.mathworks.cn/matlabcentral/answers/518004-how-do-we-write-a-code-on-similar-lines-to-the-matlab-inbuilt-functions

评论： Steven Lord 2021-8-19

As the source code of the Matlab fuctions is not disclosed, how to face situation when you are building a similar function due to lack of such toolbox. how to view the algorthm or the flow of the function?

@Walter Roberson i saw your post for the sort function, can you assist on the same.

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Answer 1

Abhishek Kolla 2021-8-19

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https://ww2.mathworks.cn/matlabcentral/answers/518004-how-do-we-write-a-code-on-similar-lines-to-the-matlab-inbuilt-functions#answer_770509

在 MATLAB Online 中打开

The source code of a in-built function in Matlab can be found by simply typing the following code in command window

open function

where function is the name of the in-built function .

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Steven Lord 2021-8-19

在 MATLAB Online 中打开

Be careful with your terminology. For functions included in MATLAB that are implemented as MATLAB script, function, or class files you can open them and read the code. One example is the ode45 function.

which ode45 % can be viewed
/MATLAB/toolbox/matlab/funfun/ode45.m

But if you are talking about functions implemented as part of the MATLAB executable and library files (like sort) that will not work.

which sort % cannot be viewed
built-in (/MATLAB/toolbox/matlab/datafun/sort)

To answer the general question, we don't generally distribute the source code for built-in functions (that are part of the MATLAB executable and libraries.) If you need this, approach your sales representative to discuss the possibility of viewing the code under an NDA.

If you're trying to implement a function from a toolbox you don't have licensed and/or installed, you can take a look at its documentation page in the online documentation to determine what the function does. As for determining how it does what it does, you may need to do research in the literature to determine the right algorithm to implement for your needs.

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