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How can i visualiize the peeks over the graph?

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Elias Unk
Elias Unk on 24 Jul 2018
My code for R peeks extraction:
m1=max(ca2)*.40;%to test
P=find(ca2>=m1);
y_levels=ca2(P);
P_loc=[];
diff_pp=[];
for k=1:length(P)-1
diff=abs(P(k) - P(k+1));
if(diff>20)
P_loc=[P_loc P(k)];
diff_pp=[diff_pp diff];
end
end
diff_pp_min=min(diff_pp);
diff_pp_max=max(diff_pp);
diff_pp_mean=mean(diff_pp);
diff_pp_amp=max(y_levels);
ca2 being the coefficient after the wavelet decomposition
ca2=appcoef(c,l,'db4',2);
any feedback regarding how i can improve it and visualize the peeks on my EGC signal

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