because I interpolate then limit the signal and also I plot the signal photoelectron vs. sample , I dont hve any idea abot time!
how to find time corresponds to peak of plot?
3 views (last 30 days)
Show older comments
Hello to everyone.
I have a signal which it is photoelectron vs. Time, I want to interpolate it with factor of 4, so I did it and derived photoelectron vs. sample. Then, I want to limit this signal just 240 sample to the right and 240 sample to the left. Now I want to know at which time I have peak? Can anyone help me? What should I do with time vector to achieve this?
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/818249/image.png)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/818254/image.png)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/818259/image.png)
%% interpolation
N_interpolation=4;
signal_padd_zero=zeros(1,N_interpolation*length(lowpass_signal));
signal_padd_zero([1:N_interpolation:end])=lowpass_signal;
interpolated_signal=lowpass(signal_padd_zero,0.01);
plot(interpolated_signal, 'b.-')
axis tight
xlabel('samples')
ylabel('photoelectron')
title('interpolated signal')
%% Limited signal
% max sample
[~,index_of_interpolated_signal]=max(interpolated_signal);
sprintf('Maximum of N occurred at index position %d.',...
index_of_interpolated_signal)
% range of samples for processing
% we limit the signal in order to reduce the computation time
x1=index_of_interpolated_signal-(60*N_interpolation);
x2=index_of_interpolated_signal+(60*N_interpolation);
interpolated_signal=interpolated_signal(x1:x2);
figure;plot(interpolated_signal, 'b.-')
axis tight
xlabel('samples')
ylabel('photoelectron')
title('limited signal')
%% now how can I find the time that corresponds to the peak?
Answers (1)
See Also
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!