Using a function_handle 'variable' from workspace in simulink

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Chris Verhoek
Chris Verhoek 2020-8-12
评论： Muhammad Faisal Khalid 2021-11-17
I have a script where I define a function as e.g.
f = @(x) 16*sin(3*x).*exp(-x.^2)+atan(x+1);
Here f is now a function handle (function_handle) in the workspace. With this script I have a corresponding simulink model where I simulate a dynamical system which has this function somewhere incorporated.
Right now, I either copy this function in a Fcn or MATLAB function block, or parametrize it such that I have the structure (k1*sin(k2*x).*exp( ...etc.)) hardcoded in the simulink model and I can change 16 easily to 12 without opening the simulink model. However, I want to change the whole function without opening the simulink model (just as changing the value of a constant).
I have no idea to do this, do you have any suggestions?
Note: I'm a student, i'm using 2020a and have access to all possible toolboxes

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Fangjun Jiang
Fangjun Jiang 2020-8-12
function handle is not supported by Simulink. Run "showblockdatatypetable"
"I want to change the whole function without opening the simulink model". There migth be a stratch way to do it. Have a MATLAB Function block, which calls a function defined in a saved .m file. In the saved .m file, call a function handle "f" defined in the base workspace. When you have this set up, you might be able to change the function handle in base workspace, and then run Simulink simulation.
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Fangjun Jiang
Fangjun Jiang 2020-8-13
Thank you for the follow up comments. I learned something new from this today.

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