Error while finding peak value and location

Question

Josh 2022-6-23

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https://ww2.mathworks.cn/matlabcentral/answers/1746505-error-while-finding-peak-value-and-location

评论： Josh 2022-6-23

As I try to find the peak value and peak position, the function is not executing for the same because of some error. Please help.

load 'vv.mat'
load 'cc.mat'
for m = 1:numel(vv)
    [pks{m},locs{m}]=findpeaks(cc{m}(end,:), vv{m}(end,:));
end
Error using findpeaks
Expected X to be strictly increasing.

Error in findpeaks>parse_inputs (line 236)
      validateattributes(Xin1,{'numeric'},{'real','finite','vector','increasing'},'findpeaks','X');

Error in findpeaks (line 135)
  = parse_inputs(isInMATLAB,Yin,varargin{:});

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Answer 1

MJFcoNaN 2022-6-23

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1746505-error-while-finding-peak-value-and-location#answer_991840

编辑：MJFcoNaN 2022-6-23

在 MATLAB Online 中打开

Hello,

You should sort the "x" variable ("vv" in your code) before calling findpeaks

load 'vv.mat'
load 'cc.mat'
for m = 1:numel(vv)
    cc0=cc{m}(end,:);
    vv0=vv{m}(end,:);
    [vv_s, ind]=sort(vv0);
    cc_s=cc0(ind);
    [pks{m},locs{m}]=findpeaks(cc_s, vv_s);
end

But then you have to add more limitation on how the peaks look like, for example their height, width, distance and so on. The more details you provide, the better findpeaks works.