Find peak and plot graph from peak

2021 2 26
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更新时间：2021 2 26
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At first , Im new here so how can I plot the peak from my data

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Walter Roberson
Walter Roberson 2021-2-26
That code already plots the peaks.
Phudit Kanittasut
Phudit Kanittasut 2021-2-26
and how can I only dot the peak and hide the graph

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Star Strider
Star Strider 2021-2-26

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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
Phudit Kanittasut 2021-2-26
I want to have a dot at peak and hide graph how can I do it ?
Star Strider
Star Strider 2021-2-26
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
Phudit Kanittasut 2021-2-26
Its run nothing or waht should I write before this code
Phudit Kanittasut
Phudit Kanittasut 2021-2-26
Oh I got it Thx u so much
Star Strider
Star Strider 2021-2-26
My pleasure!
If my Answer helped you solve your problem, please Accept it!
.

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