Selected out to simulink

Question

cyberdyne 2011-2-23

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https://ww2.mathworks.cn/matlabcentral/answers/1864-selected-out-to-simulink

Hi,

I've two arrays

ARRAY1=[5 4 1]' ARRAY2=[6 5 9]'

I need an Embedded funcion in simulink which take out equal value element ONLY (for example 'out=5' only). Please help me.

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Answer 1

cyberdyne 2011-2-23

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https://ww2.mathworks.cn/matlabcentral/answers/1864-selected-out-to-simulink#answer_2788

在 MATLAB Online 中打开

It's very very good!! Thank you very much.

Therefore if we suppose that we connect to emlblock two variable inputs with the same temporary variable (for example two definite integrals from t0 to t0+Ts for each of them, where t0 is starting istant and Ts is clock time), we can take out the equal element writing:

function y = fcn(u1,u2)
% This block supports the Embedded MATLAB subset.
% See the help menu for details. 
eml.extrinsic('ismember')
eml.extrinsic('find')
a=ismember(u1,u2);
r=find(a);
rr=1;  
rr=r; 
ur=u1(rr);
y =ur;

is it???

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Paulo Silva 2011-2-23

Thank you too for selecting your own answer instead of mine!

cyberdyne 2011-2-23

Really I don't make this function necessarily with EML. I can do it with C S-function but I don't know C commands to make it.

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Answer 2

Paulo Silva 2011-2-23

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https://ww2.mathworks.cn/matlabcentral/answers/1864-selected-out-to-simulink#answer_2783

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Here's a code that works just for your example, I had trouble with mxArray not being supported by embedded functions so the final code looks very bad but works, I tested it with your arrays, each one inside a constant block, both array connect to a mux and that mux to the embedded function, the result is shown on a display, in this case the display shows the number 5

function y = fcn(u)
% This block supports the Embedded MATLAB subset.
% See the help menu for details. 
eml.extrinsic('ismember')
eml.extrinsic('find')
u1=[u(1) u(2) u(3)]; %had to do this instead of u1=u(1:3)
u2=[u(4) u(5) u(6)];
a=ismember(u1,u2);
r=find(a);
rr=1; %the trick here is to have a temporary variable of the same type
rr=r; %we expect the extrinsic function to return
ur=u1(rr);
y =ur;