Find Average Peaks Function

Question

Nathan Johnson 2023-9-22

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2024567-find-average-peaks-function

回答： Star Strider 2023-9-22

I'm trying to find the average peaks from a code script I made. I currently am using the "findpeaks" function with a minimum y-axis value necessary. Example is

[pksR1,LcsR1]=findpeaks(filt_RLE,"MinPeakHeight",55);

What function can I call to get the mean bewteen the peaks within the code.

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Dyuman Joshi 2023-9-22

"What function can I call to get the mean bewteen the peaks within the code."

You want to find the mean of all the peaks you obtained?

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Answer 1

Star Strider 2023-9-22

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2024567-find-average-peaks-function#answer_1316402

在 MATLAB Online 中打开

The mean value of the function between any two peaks would be —

x = linspace(0, 10, 250).';

filt_RLE = 50 * sin(2*pi*x*1.5) .* cos(2*pi*x/10) + 30;

[pksR1,LcsR1]=findpeaks(filt_RLE,"MinPeakHeight",55);

LcsR1 = LcsR1.';

for k = 1:numel(LcsR1)-1

meanv(k,:) = mean(filt_RLE(LcsR1(k) : LcsR1(k+1)));

end

figure

plot(x, filt_RLE)

hold on

plot(x(LcsR1), filt_RLE(LcsR1), 'r^')

hold off

yline(55, '--k')

Results = table(x(LcsR1(1:end-1)), x(LcsR1(2:end)),meanv, 'VariableNames',{'Peak Start','PeakEnd','Mean'})

Results = 9×3 table

Peak Start PeakEnd Mean __________ _______ ______ 0.16064 0.84337 33.377 0.84337 1.4859 30.741 1.4859 3.8554 31.279 3.8554 4.498 30.966 4.498 5.1807 33.565 5.1807 5.8233 30.875 5.8233 6.506 32.694 6.506 8.8353 30.744 8.8353 9.5181 33.229

.