MATLAB: When you have a plotted signal, how can you isolate one part of it, or more parts

digital signal processingisolateMATLABpeakplotsignalsignal processing

When you have a plotted signal, how can you isolate one part of it, or more parts?

Here is the signal I have, i need to isolate the peak:

Best Answer

Use the findpeaks function. Post your data if you need more help with the function.

Related Solutions

MATLAB: How to find location of right peaks

Use findpeaks with two outputs:

[pks,locs] = findpeaks(SSignal);

The ‘locs’ variable will have the index values of the peaks it returns in the ‘pks’ variable.

To plot them, use ‘locs’ as a subscript in the vectors in your second plot call:

plot(time(locs), SSignal(locs),'o')

MATLAB: How to find n values before and after a maximum of an array

Something like this will work

x; % array of x-values
y; % array of y-values
[max_y, max_idx] = max(y);
x_max = x(max_idx);
interval = 0.02; % length of interval before and after peak
idx = (x_max-interval < x) & (x < x_max+interval);
x_interval = x(idx);
y_interval = y(idx);

x_interval and y_interval contain values in around the peak.

Best Answer

Related Solutions

MATLAB: How to find location of right peaks

MATLAB: How to find n values before and after a maximum of an array

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