How to use arrayfun in Simulink?

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Andrew Poissant 2017-8-25

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https://ww2.mathworks.cn/matlabcentral/answers/354081-how-to-use-arrayfun-in-simulink

编辑： Andrew Poissant 2017-8-29

I am trying to use arrayfun in Simulink but first got the error "Function 'arrayfun' is not supported for code generation. Consider adding coder.extrinsic('arrayfun') at the top of the function to bypass code generation." Then I tried adding coder.extrinsic('arrayfun') before the arrayfun call but then I get an error saying "Cannot pass an object of class 'function_handle' to MATLAB function 'arrayfun'". Does anyone have a way to use arrayfun in Simulink? My code works in matlab but Simulink can't handle function handles. The code below is a simplified version of what I have in my model but serves the same purpose.

coder.extrinsic('arrayfun');
dx = [0 5 10 15];
n = 5;
dn_x = arrayfun(@(dx)linspace(0,dx,n), dx(2:end)', 'Uni',0);

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Answer 1

Sudarshan Kolar 2017-8-28

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https://ww2.mathworks.cn/matlabcentral/answers/354081-how-to-use-arrayfun-in-simulink#answer_279444

demoArrayFun.zip

Hi Andrew,

The limitations of using function handles for code generation are mentioned here.

You are not allowed to pass function handles to extrinsic functions.

I am curious to learn more about why do you want to use 'arrayfun' with simulink. I am attaching a demo model for your reference. I am using Matlab Interpreted Function block to call 'arrayfun' inside Simulink.

Hope this helps you get started.

Sudarshan

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Andrew Poissant 2017-8-28

编辑：Andrew Poissant 2017-8-28

I have a start point, 0, and an endpoint, dx, and I need to fill in n points in between the two. Are there other ways to do this other than arrayfun in Simulink such that I do not need the Matlab Interpreted Function? I have a lot of other code before and after arrayfun is used so it would be easier to use and understand if it was all in my matlab function block.

Andrew Poissant 2017-8-29

编辑：Andrew Poissant 2017-8-29

I believe I may be able to just use linspace without arrayfun, only problem is my dx value are not scalars so it gives me an error when I just use linspace

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