MATLAB: Average of Wave from 10 waves in single graph

Question

Hello Everyone,

I have a doubt concerning the average of the wave from a set of waves from sinlge dataset. I need to get a single average curve from all the curves from the figure. I am new to matlab and can not figure it out and have not been able to do so for a long time. I need you to help and it would be great for me. Thanks in advance.

Answer 1

Try this:

D = load('P_191005_000.mat');
ap = D.b;
Ts = 1E-3;                                                                  % Assume Sampling Interval
tv = linspace(0, 1, numel(ap))*Ts;                                          % Create Time Vector
[pks, locs] = findpeaks(-ap, 'MinPeakDist',250, 'MinPeakHeight',-85 );      % Determine Peaks & Indices
figure(1)
plot(tv, ap)
hold on
plot(tv(locs), -pks, '+r')
hold off
grid
for k1 = 1:numel(locs)-1
    apc{k1} = ap(locs(k1):locs(k1+1));                                      % Define Frames
    tvc{k1} = tv(locs(k1):locs(k1+1));
    len(k1) = numel(locs(k1):locs(k1+1));
end
enstrim = cellfun(@(x)x(1:min(len)), apc, 'Uni',0);                         % Trim Records To Shortest Length
ensavg = mean([enstrim{:}],2);                                              % Ensemble Average
figure(2)
hold all
for k1 = 1:numel(apc)
    plot(tvc{k1}-tvc{k1}(1), apc{k1})                                       % Plot Frames
end
plot(tv(1:numel(ensavg)), ensavg.', '-r', 'LineWidth',2)
hold off
grid

producing: