How to get number of peaks and locs from different graphs that are plotted using a single for loop?

Question

Zara Khan 2018-7-16

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/410489-how-to-get-number-of-peaks-and-locs-from-different-graphs-that-are-plotted-using-a-single-for-loop

评论： Zara Khan 2018-7-16

    figure;
for k=1:length(x)
    profile(k)=img(y(k),x(k));
    plot(profile,'r-','LineWidth',2);
grid on;
ylim([0 2]);
end

This code giving me different plots. For each of the plot I am getting different peaks. How can individually calculate no of peaks and locs for each of the plot?

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Answer 1

KSSV 2018-7-16

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https://ww2.mathworks.cn/matlabcentral/answers/410489-how-to-get-number-of-peaks-and-locs-from-different-graphs-that-are-plotted-using-a-single-for-loop#answer_328947

Have a look on functions max and findpeaks.

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KSSV 2018-7-16

在 MATLAB Online 中打开

iwant = cell(length(x)) ;
figure;
for k=1:length(x)
    profile = img(y(k),x(k));
    [pks,locs] = findpeaks(profile) ;
    iwant{i} = pks ;
    plot(profile,'r-','LineWidth',2);
grid on;
ylim([0 2]);
end