How to use loop function to find the 1st to Nth elements' average, and then 2nd to Nth element's average? Thanks

Hi guys thanks for helping me. Suppose i have 700 data in a column, and i want to find out the first 120 elements' average. Then starting from this point, i want to find out the average of the sum of from 121st to the 700th, then from 122nd to 700th and so on. I know i have to use iteration to solve this, but i fail to set up a good algorithm and required syntax.

I am beginner of Matlab, please help me, thank you !!

Answer 1

[dpb]

Navg=120;                         % number for moving average
krnl=ones(N,1)/N;                 % convolution kernel over N elements
xfilt=conv(x, krnl, 'valid')      % filtered mean result over valid elements

[XIN SHEN]

Thank you so much! It helps a lot