I'm trying to calculate a moving RMS of an acceleration signal.
One of the answers in the post, shows the formula for calculating moving RMS for discrete signal.
The formula they suggest:
I have a few questions on this formula. Since $i$ would be, for most part of the summation, less than $N$(no of samples), therefore k would be negative and the negative index does not make sense to me. That's why I'm having trouble understanding this formula.
Also, is there a python method to find moving RMS of a signal like MATLAB has