# How to calculate a running value of a function for every 30 samples?

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Kalasagarreddi Kottakota on 29 Nov 2022
Commented: Chunru on 1 Dec 2022
clear all;
clc;
Nt= 2000; % Total samples
d = randn(1,Nt);
ratioCompute = sum(d)/mean(d);
I need calculate this ratioCompute for every 30 samples like a sliding window.

Chunru on 29 Nov 2022
Nt= 50; % Total samples
d = randn(1,Nt);
ratioCompute = movmean(d, 30)
ratioCompute = 1×50
-0.1405 -0.1198 -0.1145 -0.0710 0.0116 0.0064 0.0398 0.0308 0.0168 0.0260 0.0339 0.0456 0.0118 0.0280 0.0412 0.0195 0.0005 0.0667 0.0811 0.0800 0.0896 0.1074 0.1868 0.1181 0.0611 0.1342 0.2335 0.2915 0.2876 0.2794
Kalasagarreddi Kottakota on 30 Nov 2022
Edited: Kalasagarreddi Kottakota on 30 Nov 2022
yes, here I was making a simple formulation. But actual formula which I will compute is different. Just am I looking to find a way to compute a ratio for every 30 samples.
Chunru on 1 Dec 2022
They you try:
ratioCompute = movsum(d, 30) ./ movmean(d, 30);