How to find the difference of the maximum points between datasets

Question

Ahmed Abdalazeez 2019-1-21

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https://ww2.mathworks.cn/matlabcentral/answers/440740-how-to-find-the-difference-of-the-maximum-points-between-datasets

评论： Image Analyst 2019-1-21

example.jpg

Hi,

I have three data sets of sine waves, I am looking of the way to find the maximum points (only) for each dataset and then find the difference between them

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Answer 1

Image Analyst 2019-1-21

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https://ww2.mathworks.cn/matlabcentral/answers/440740-how-to-find-the-difference-of-the-maximum-points-between-datasets#answer_357360

在 MATLAB Online 中打开

Try

[max1, index1] = max(signal1);
[max2, index2] = max(signal2);
[max3, index3] = max(signal3);
% Difference between maximum amplitudes.
diff12 = abs(max1 - max2); 
diff13 = abs(max1 - max3);
diff23 = abs(max2 - max3);
% Now diff between indexes
indexDiff12 = abs(index1 - index2);
indexDiff13 = abs(index1 - index3);
indexDiff23 = abs(index2 - index3);

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Ahmed Abdalazeez 2019-1-21

what I want to do, is to find not only one msximum but the max for each peak for all dataset, I used findpeak, but it gives me several points, but indeed I need only the maximum point for each peak,,

thanks in advance