For Loop conditon for peak position segmentation

Hello, I have segmented this signal and now I want to separate only the remarked peaks.

ThDif = 20000;

for odif = 1:length(G2) 
if G2(odif)> ThDif
 Qdif(odif)=G2(odif);
else Qdif(odif)=0
end
end

Pdif = find(Qdif>2); 
Sdif = diff(Pdif);

Hdif(1) = Pdif(1);

pomDif = 2;

 for adif = 1:length(Sdif)
 if Sdif(adif)>1
 Hdif(pomDif) = Pdif(adif); 
 Hdif(pomDif+1) = Pdif(adif+1); 
 pomDif=pomDif+2;
 end
 end

pom2dif=1;

 for bdif = 1:2:length(Hdif)-1 

 [hodnDif pozDif] = max(G2(Hdif(bdif):Hdif(bdif+1)));
 Mdif(pom2dif) = pozDif+Hdif(bdif);
 pom2dif = pom2dif+1;
 end
 
 plot(data); hold on;
xlim([1 800]);
stem(Mdif,ones(1,length(Mdif))*300, 'r');