how to fix MATLAB Function block issue?

i am using MATLAB Function for my model as a relay such as

function y = fcn(P,T)

if(T <= 12.0)

y=1;

else

if (P <= 4800000)

y=0;

else

y=1;

end

end

and this is working well

but i have to find mean value of 5 maximum peaks in a specific interval

so i am writing my code such as

function y = fcn(P,T)

if(T <= 12.0)

y=1;

else

if ((mean(maxk(findpeaks(P((T >= 12) & (T <= 12.1))),5))) <= 4800000)

y=0;

else

y=1;

end

end

but matlab function block giving error where as this command {(mean(maxk(findpeaks(P((T >= 12) & (T <= 12.1))),5)))} is working in command window but showing error when i use it in Matlab function block

following error comes

Function 'maxk' is not supported for code generation. Consider adding coder.extrinsic('maxk') at the top of the function to bypass code generation

Answer 1

[Raj]

Your question itself is self explanatory and the error message is the solution to your problem. Many inbuilt MATLAB functions like the one you are using (maxk) are not supported for code generation. If you are using there functions in your model, you will have to declare them as "coder.extrinsic". It basically means that "During simulation, the code generator produces code for the call to an extrinsic function, but does not produce the function's internal code. Therefore, simulation can run only on platforms where MATLAB software is installed. During standalone code generation, MATLAB attempts to determine whether the extrinsic function affects the output of the function in which it is called. Provided that there is no change to the output, MATLAB proceeds with code generation, but excludes the extrinsic function from the generated code. Otherwise, compilation errors occur."

See full details here

Now that being said, if you want to generate code for the full function then you will have to remove coder.extrinsic MATLAB functions from your model and use self defined functions that basically do the same job.

[madhan ravi]

+1