draw a graph of peaks find peaks

I use the find peaks command, but it does not give me the exact coordinates for plotting

[pks,locs,w,p]=findpeaks(X(1026,:),FsY,'MinPeakProminence',2);
figure(1), clf
plot(Y,X(1026,:),'k-')
hold on
plot(locs,pks,'r*')

the graph is not created correctly, all red dots are shifted to the left

Thanks in advance

p.s. if I use only find peaks, the graph builds the correct one for me, but I need to show these peaks in a different color

Answer 1

[Chunru]

[pks,locs,w,p]=findpeaks(X(1026,:),FsY,'MinPeakProminence',2);
figure(1), clf
% plot(Y,X(1026,:),'k-')
plot(X(1026,:), Y, 'k-')
hold on
plot(X(1026, locs), pks,'r*')   % <=============

Answer 2

[Image Analyst]

Try this:

xv = X(1026, :); % All columns of row 1026
[peakValues, indexesOfPeaks, w, p] = findpeaks(xv, FsY, 'MinPeakProminence', 2);

% Plot original data in black
hFig = figure;
plot(xv, Y, 'k-', 'LineWidth', 2)
grid on;
xlabel('x');
ylabel('FsY')

% Now plot red stars over the peaks.
hold on
plot(xv(indexesOfPeaks), peakValues,'r*');

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