is there's a way to automatically find peaks in an histogram?
79 次查看(过去 30 天)
显示 更早的评论
Hello,
I have a script to analyze data from a detector (the data is not necessarily repeated). right now I have to find the peaks manually which is time-consuming!
is there's a way I can get the range of the peak base in the x-axis automatically? and is there's a way to neglect small peaks (let's say small in respect to the ratio from the max peak)?
here is an example of histogram I'm working with
采纳的回答
Steven Lord
2020-5-29
You can do this using the islocalmax function.
% Sample data
rng default
x = randn(1, 1e5);
h = histogram(x);
% Retrieve some properties from the histogram
V = h.Values;
E = h.BinEdges;
% Use islocalmax
L = islocalmax(V);
% Find the centers of the bins that islocalmax identified as peaks
left = E(L);
right = E([false L]);
center = (left + right)/2;
% Plot markers on those bins
hold on
plot(center, V(L), 'o')
4 个评论
Image Analyst
2020-5-29
How is islocalmax() different than findpeaks()? Is it just that it's in base MATLAB instead of the Signal Processing Toolbox?
更多回答(0 个)
另请参阅
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!