findpeaks for different thresholds

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AHN 2019-1-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/441064-findpeaks-for-different-thresholds

评论： AHN 2019-1-25

Hi,

I am trying to find pks and locs for different threshold values. For one threshold value, this has worked fine. But for different threshold values (randomly generated), is there a way to store all the values of pks and locs? I would ideally like, for example, for threshold=x1, results in [pks1,locs1] format..for threshold=x2, results in [pks2,locs2] format and so on. Please let me know.

Thank you!

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Walter Roberson 2019-1-23

Cell array ?

AHN 2019-1-23

Thank you very much for the reply. Yes, cell array did work. But how to store all values in a for-loop in a cell array?

for Threshold1=linspace(x1,x2,n)
[pks1,locs1] = findpeaks(data);
Results(1).Threshold1 = Threshold1;
Results(1).pks1 = pks1;
Results(1).locs1 = locs1;
end

This code just stores the last values of the iteration.

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Answer 1

Walter Roberson 2019-1-23

0
链接

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https://ww2.mathworks.cn/matlabcentral/answers/441064-findpeaks-for-different-thresholds#answer_357653

在 MATLAB Online 中打开

Thresholds = linspace(x1,x2,n);
for thresh_idx = 1 : length(Thresholds)
    Threshold1=linspace(x1,x2,n);
    [pks, locs] = findpeaks(data, 'MinPeakHeight', Threshold1);
    Results(thresh_idx).Threshold1 = Threshold1;
    Results(thresh_idx).pks1 = pks;
    Results(thresh_idx).locs1 = locs;
end

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AHN 2019-1-25

Thank you for a head start on this, was my first time with cell arrays. The above code again stored only the last values of the iteration. However, managed to solve it with the edited code below. Thanks again.

Thresholds=linspace(x1,x2,n);
for thresh_idx = 1 : length(Thresholds);
[pks,locs] = findpeaks(data,'MinPeakHeight',Thresholds(thresh_idx));
Results{thresh_idx}={Thresholds(thresh_idx),[pks,locs]};
end

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