Hi, how can I divide this signal into 3 segments? The first segment I want to be the signal before the major peak, the second segment would be the major peak and the last segment would be the signal after the peak.
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The first segment I want to be the signal before the major peak, the second segment would be the major peak and the third segment would be the signal after the major peak. You can find the signal attached.
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Star Strider
2018 年 12 月 29 日
One approach:
The Code —
D = load('signals (1).mat');
Signal = D.Signal; % Get ‘Signal’
N = length(Signal);
t = linspace(0, 1, N) * N; % Create Time Vector
[pk,loc] = findpeaks(Signal, 'MinPeakHeight',1); % Determine Indices Of Various Components
[trofs,trlocs] = findpeaks(-Signal);
ltidx = find(trlocs < loc, 1, 'last');
gtidx = find(trlocs > loc, 1, 'first');
Out{1} = {Signal(1:trlocs(ltidx)); Signal(trlocs(ltidx)+1:trlocs(gtidx)-1); Signal(trlocs(gtidx):end)}; % ‘Signal’ Cell Array
Out{2} = {t(1:trlocs(ltidx)); t(trlocs(ltidx)+1:trlocs(gtidx)-1); t(trlocs(gtidx):N)}; % ‘t’ Cell Array
figure
plot(Out{2}{1}, Out{1}{1}, 'r')
hold on
plot(Out{2}{2}, Out{1}{2}, 'g')
plot(Out{2}{3}, Out{1}{3}, 'b')
hold off
grid
The Plot —
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