How to do wavelet transform in simulink by using Function block?

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prachaya songmusik
prachaya songmusik 2021-3-21
Hello
i am doing dc motor simulation by using simulink. i want to analyse current signal by wavelet transform theory.
in my case, i use Function block to write the code but it shown some error 'Failed to resolve data 'y' in 'MATLAB Function' to a valid Simulink.Signal object.'
here is my code in function block
function y = fcn(u)
x = u;
level =1;
[c,l] = wavedec(x,level,'db1');
d1 = detcoef(c,l,level);
y= plot(d1)
Anyway, if anyone have some reccommend or some idea to deal with wavelet tranform in simulink(i know, there is a tool called Wavelet Analyzer that able to analyse signal directly. unfortunately, i want to use WT in real-time signal), Please let me know
i am new to matlab and Looking forward to hear from you
Thank you in advance

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