CODEWITHSUNDEEP
matlab
user3217416
user3217416

Reputation: 37

maximum points detection in a multiple plot MATLAB

I have 2 FFT spectrums on a plot. I want to get the top 5 maximum points of the overall plot. I get the maximum points separately for each spectrum. How can i combine these spectrums into one and get the overall maximum 5 points?

Upvotes: 0

Views: 95

Answers (2)

Deve
Deve

Reputation: 4648

Put the spectra in one vector and sort them in descending order.

spec1 = fft(x1); % a spectrum (column vector)
spec2 = fft(x2); % another spectrum (column vector)

dummy = abs([spec1; spec2]); % concatenate absolute values
sorted = sort(dummy, 'descending');

five_greatest = sorted(1:5);

Upvotes: 0

user1481317
user1481317

Reputation:

You have two separate maximum matrix: lets Max1 and Max2 Now combine both of them to form third matrix

Max3 = [Matx1 Max2]

Sort the Max3 in descending order

Max3 = sort(Max3,'descend');

Extract the first 5 element

peaks = Max3(1:5)

Upvotes: 1

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