Resample of time series

I have time series and corresponding amplitude in Excel file. I have to resample it Please help.

Answer 1

[Azzi Abdelmalek]

you can use interp1 function

Answer 2

[David Sanchez]

Read data from the first worksheet into a numeric array:

A = xlsread('myExample.xlsx');

time = A(:,1); % in case your time series is in the first column of your excell
amplitude = A(:,2) % in case your amplitudes are in the second column of your excell
n = 3; %resample every third value --> adapt to your needs
resample = 1:n:numel(time);

time_resampled = time(resample);
amplitude_resampled = amplitude(resample);