Running Average of a large data set

I have a large dataset (Please see attached file). Column-1 is time in picosecond , and Column-2 is a autocorrelation. I need a running average over a time window T = 1 ps. In column 1 , data has been collected every 0.01 ps, so every 101 rows are data for 1 ps. Any suggestions will be really helpful.

Answer 1

[Jan]

A = readmatrix(filename);
A(:, 3) = movmean(A(:, 2), 101);