Adding legends for a plot in matlab function block.

i wanted to add a legend to the plot which is the output from matlab function block, but im ending up with an error as "Function 'legend' not supported for code generation." so can anyone help me out to add this legend function in matlab function block.

function [mean, stdev] = stats(vals)
len = length(vals);
mean = avg(vals,len);
stdev = sqrt(sum(((vals-avg(vals,len)).^2))/len);
plot(vals,"-+");
legend("Autoupdate","off")
end

[Adam Danz]

What is avg? Did you intend to compute the average or mean?

[Charan]

i am calculating the mean over here , but anyways my main point is to have a legend for a plot which is plotted from matlab function.

[Adam Danz]

Right after receiving this error, could you run the following 2 lines of code and share the content each line produces? Also, please let me now what MATLAB release you're using.

S = lasterror
S.stack

[Fangjun Jiang]

The error is reported by Simulink during model compile. The code has not been able to be executed yet.

Answer 1

[Fangjun Jiang]

There is a way to deal with this type of error.

https://www.mathworks.com/help/coder/ug/function-is-not-supported-for-code-generation.html

However, are you sure you want to do this? Because the MATLAB Function block in a Simulink model usually is executed at every simulation step.

This recent Q&A might give you a better idea.

https://www.mathworks.com/matlabcentral/answers/2069311-simulink-update-figure-in-matlab-function

[Charan]

thanks for the answer , i was able to solve the above error by passing the legend as an extrinsic function inside a matlab function block.

coder.extrinsic('legend')