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

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XIN SHEN 2016-9-30

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https://ww2.mathworks.cn/matlabcentral/answers/305247-how-to-use-loop-function-to-find-the-1st-to-nth-elements-average-and-then-2nd-to-nth-element-s-ave

评论： XIN SHEN 2016-10-4

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 !!

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Answer 1

dpb 2016-9-30

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https://ww2.mathworks.cn/matlabcentral/answers/305247-how-to-use-loop-function-to-find-the-1st-to-nth-elements-average-and-then-2nd-to-nth-element-s-ave#answer_236822

在 MATLAB Online 中打开

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