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

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Kalasagarreddi Kottakota ，2022-11-29

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https://ww2.mathworks.cn/matlabcentral/answers/1866398-how-to-calculate-a-running-value-of-a-function-for-every-30-samples

评论： Chunru ，2022-12-1

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.

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回答（1 个）

Chunru 2022-11-29

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https://ww2.mathworks.cn/matlabcentral/answers/1866398-how-to-calculate-a-running-value-of-a-function-for-every-30-samples#answer_1115123

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