# Utilizing "maxk" function in series of vectors

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Daeyeon Koh on 2 Sep 2021
Edited: Matt J on 2 Sep 2021
Hi. I used "findpeaks" function, and get peak datas in vector(pks, locs): "locs" means the X value.
And I wanna get 4 peak datas in vector in order to "locs" value like the loaded picture in red grid (in the range of 1<locs<10).
But according to the present code, I can only get seperate "maxk" values for each pks and locs.
How can I get desirable vector array like the picture?
for n=1:col-2
y=numbers(:,col);
ys=smooth(y,50,'sgolay',5);
[pks,locs] = findpeaks(ys,x,'MinPeakDistance',0.5);
A{n}=[pks,locs];
B{n}=maxk(A{n,1}(locs>1&locs<10,:),4);
end

Matt J on 2 Sep 2021
Edited: Matt J on 2 Sep 2021
for n=1:col-2
y=numbers(:,col);
ys=smooth(y,50,'sgolay',5);
[pks,locs] = findpeaks(ys,x,'MinPeakDistance',0.5);
[~,idx]=maxk( pks(locs>1&locs<10) ,4);
A{n}=[pks,locs];
B{n}=A{n}(idx,:);
end
##### 2 CommentsShowHide 1 older comment
Matt J on 2 Sep 2021
To troubleshoot, we need to see pks and locs. I suggest attaching them in a .mat file.