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Split array into sub arrays and apply function

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Priscilla
Priscilla 2020-7-15
评论： Priscilla 2020-7-15
Hi everyone,
I am using findpeaks to detect peaks in my data and would like to create a sub arrays everytime a peak is detected and then apply a function to the sub arrays for example
If
x = [0.2954 0.0861 -0.0204 0.0046 0.2297 0.7651 -0.4482 -1.2974 0.3673 -0.7759 0.5676 1.0851 0.4082 0.3364 -0.3396 -0.1935 0.5228]
Peaks = [0.7651 0.5676 0.5228]
expected output / sub arrays = [{0.2954 0.0861 -0.0204 0.0046 0.2297 0.7651} {-0.4482 -1.2974 0.3673 -0.7759 0.5676} {1.0851 0.4082 0.3364 -0.3396 -0.1935 0.5228}
Thanks in advance
Regards,
Abigail

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采纳的回答

madhan ravi
madhan ravi 2020-7-15
[lo, ii] = ismember(PeakS, x);
ix = diff([0, ii(lo)]);
Output = mat2cell(x, 1, ix)
  2 个评论
madhan ravi
madhan ravi 2020-7-15
As Stephen comments if you use the second output of findpeaks() you replace ii(lo) in my code with the second output of findpeaks().

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更多回答（1 个）

Parth Dethaliya
Parth Dethaliya 2020-7-15
编辑：Parth Dethaliya 2020-7-15
x = [0.2954 0.0861 -0.0204 0.0046 0.2297 ...
0.7651 -0.4482 -1.2974 0.3673 -0.7759 ...
0.5676 1.0851 0.4082 0.3364 -0.3396 -0.1935 0.5228];
Peaks = [0.7651 0.5676 0.5228];
SubArray=cell(1,size(Peaks,2));
Init=1;
for i=1:size(Peaks,2)
SubArray{i} = x(Init:find(x==Peaks(i)));
Init = find(x==Peaks(i))+1;
end
Seems the code is self-explanatory, still comment if you have any queries.
Hope it helps!!

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