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findpeaks() neglecting the high amplitude peaks.Does not work as exptected

3 visualizaciones (últimos 30 días)
I am attaching herewith the data i am working with. Findpeaks() is not detecting the highest amplitude peaks. Attached is the data I am working with. Following is the code:
file = 'forRef_2.xls';
col = xlsread(file,'J:J');
peaks=findpeaks(col);
[pks,locs] = findpeaks(col);
%both on same plot
figure
plot(col,'r')
hold on
plot(locs,pks,'pg', 'MarkerFaceColor','b')
legend('original','peaks')
  4 comentarios
Andrew Newell
Andrew Newell el 18 de Abr. de 2017
And do you use exactly the code you have provided above? Or do you select one of the columns in col?

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Andrew Newell
Andrew Newell el 18 de Abr. de 2017
When I try this code, I get 7 plots, and figure 7 looks like your figure except that all the peaks are correctly identified:
file = 'forRef_2.xls';
col = xlsread(file,'J:J');
for ii=1:size(col,2)
peaks=findpeaks(col(:,ii));
[pks,locs] = findpeaks(col(:,ii));
%both on same plot
figure
plot(col(:,ii),'r')
hold on
plot(locs,pks,'pg', 'MarkerFaceColor','b')
legend('original','peaks')
end
  11 comentarios
preeti visweswaran
preeti visweswaran el 19 de Abr. de 2017
I would be grateful to you if you could advise me another problem posted in https://www.mathworks.com/matlabcentral/answers/336003-peak-detection-without-using-findpeaks

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