Find peak and plot graph from peak

At first , Im new here so how can I plot the peak from my data

[Walter Roberson]

That code already plots the peaks.

[Phudit Kanittasut]

and how can I only dot the peak and hide the graph

Answer 1

[Star Strider]

I am not certain what you want to do.

If you want to get the peaks and their indices, request those outputs:

[pks,locs] = findpeaks(pure_brain(:,2));                    % Get Peaks (‘pks’) and Peak Indices (‘locs’)

I have no idea what is in your data file, however if you want to plot them and indicate them, try this:

x = 1:size(pure_brain,1);

figure
plot(x, pure_brain(:,2))
hold on
plot(x(locs), pure_brain(locs,2), '^r')
hold off
grid

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[Phudit Kanittasut]

I want to have a dot at peak and hide graph how can I do it ?

[Star Strider]

Try this:

figure
plot(x(locs), pure_brain(locs,2), '.r')
grid

That will plot a red dot at the top of each peak findpeaks returns, and will not plot the line plot of the original data (that were plotted in the code I originally posted).

[Phudit Kanittasut]

Its run nothing or waht should I write before this code

[Phudit Kanittasut]

Oh I got it Thx u so much

[Star Strider]

My pleasure!

If my Answer helped you solve your problem, please Accept it!

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