findpeaks() neglecting the high amplitude peaks.Does not work as exptected

1 次查看（过去 30 天）

显示更早的评论

preeti visweswaran 2017-4-18

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/335995-findpeaks-neglecting-the-high-amplitude-peaks-does-not-work-as-exptected

评论： preeti visweswaran 2017-4-19

采纳的回答： Andrew Newell

forRef_2.xls

在 MATLAB Online 中打开

I am attaching herewith the data i am working with. Findpeaks() is not detecting the highest amplitude peaks. Attached is the data I am working with. Following is the code:

file = 'forRef_2.xls';
col = xlsread(file,'J:J');
peaks=findpeaks(col);
[pks,locs] = findpeaks(col);
%both on same plot
figure
plot(col,'r')
hold on
plot(locs,pks,'pg', 'MarkerFaceColor','b')
legend('original','peaks')

4 个评论
显示 2更早的评论隐藏 2更早的评论

Andrew Newell 2017-4-18

And do you use exactly the code you have provided above? Or do you select one of the columns in col?

preeti visweswaran 2017-4-18

yes,same code

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Andrew Newell 2017-4-18

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/335995-findpeaks-neglecting-the-high-amplitude-peaks-does-not-work-as-exptected#answer_263488

在 MATLAB Online 中打开

When I try this code, I get 7 plots, and figure 7 looks like your figure except that all the peaks are correctly identified:

file = 'forRef_2.xls';
col = xlsread(file,'J:J');
for ii=1:size(col,2)
  peaks=findpeaks(col(:,ii));
  [pks,locs] = findpeaks(col(:,ii));
  %both on same plot
  figure
  plot(col(:,ii),'r')
  hold on
  plot(locs,pks,'pg', 'MarkerFaceColor','b')
  legend('original','peaks')
end

11 个评论
显示 9更早的评论隐藏 9更早的评论

Andrew Newell 2017-4-19

Glad to hear that you got it working!

preeti visweswaran 2017-4-19

I would be grateful to you if you could advise me another problem posted in https://www.mathworks.com/matlabcentral/answers/336003-peak-detection-without-using-findpeaks

请先登录，再进行评论。