Script to make a average on sliding windows time

Hello,

I have a timeseries (recorded from simulation) and a need to make this calculation :

I need to set a sliding windows time (for ex 10ms) and each 1 ms this windows move forward and calculate the average of the sample.

This calculation is meant to smooth a ramp signal

i made it with simulink , but the windows need to be a parameter, so its not userfriendly

Thank a lot for answers.