Why is my code identifies only few peaks?

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Hello there,
I have a code that generates graph of two column vectors by plotting the peak values. The code works well except for a case where if i add mean to center my axis,it is plotting only first one or 2 peaks for the files. However, if i take off the the code in brackets which is to find mean ( a1 = XDATA - mean (XDATA); plot(TIMESTEPS, a1); ) the code works well identifying all the peaks. Can anyone help me out with this?
>> %BATCH MODE
files = dir('C:\Users\Deakin Uni\Documents\MATLAB\a\*.xlsx');
fNames = {'90','110','150'};
%for each file
for k= 1: length(fNames)
% extract file names
fName = ['C:\Users\Deakin Uni\Documents\MATLAB\a\', fNames{k}];
[XDATA, TIMESTEPS] = importfile(fName);
a1 = XDATA - mean (XDATA);
plot(TIMESTEPS, a1);
[peakvals,peaklocs] = findpeaks(a1, 'minpeakdistance',50, 'minpeakheight', 0.00001);
peaktime = TIMESTEPS(peaklocs);
createfigure4(TIMESTEPS, a1, peaktime, peakvals)
saveas(gcf,sprintf('chaitu%d.png',k));
end
Looking for a quick answer
Thanks in advance

Risposta accettata

Greg Dionne
Greg Dionne il 2 Mag 2017
you probably should also subtract the mean from the value you passed to 'minpeakheight' if you want it to track the data.
  4 Commenti
Chaitanya Bade
Chaitanya Bade il 9 Mag 2017
Also, do you know how can i run the csvwrite command in a loop. I have used the one mentioned above. It doesn't work. Any suggestions?
Greg Dionne
Greg Dionne il 11 Mag 2017
Probably best to ask a separate question for that (include what you tried and what's not working well). I've used xlsread and xlswrite but I'm not trying to write streamed output like you are.

Accedi per commentare.

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