I have array and want to calculate mean every five element in this array and replace every five element by their mean value

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Lia Kirtadze 2022-8-25

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https://ww2.mathworks.cn/matlabcentral/answers/1786470-i-have-array-and-want-to-calculate-mean-every-five-element-in-this-array-and-replace-every-five-elem

移动：Rik 2022-8-25

Hello

I have different matrixes and size of those matrixes differ as well

Generally I want to do same thing on these arrays

For instance in case of array that consists of 3000 element, I want to calculate mean of every 5 element in this array and write this one single mean value instead of 5 elements

Shortly I want to calculate every next 5 element mean and replace those elements with this mean value

Can anyone provide me with corresponding code?

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Bruno Luong 2022-8-25

编辑：Bruno Luong 2022-8-25

在 MATLAB Online 中打开

A = 1:100

A = 1×100

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

n = 5;

Astair = repelem(mean(reshape(A,n,[]),1),1,n)

Astair = 1×100

3 3 3 3 3 8 8 8 8 8 13 13 13 13 13 18 18 18 18 18 23 23 23 23 23 28 28 28 28 28

plot(A)

hold on

plot(Astair)

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Lia Kirtadze 2022-8-25

移动：Rik 2022-8-25

and also my matrix is vertical

Bruno Luong 2022-8-25

编辑：Bruno Luong 2022-8-25

在 MATLAB Online 中打开

Truncation if the length of the original vector if not divisible by n:

Astair = repelem(mean(reshape(A(1:n*floor(end/n)),n,[]),1),1,n);

Tip to reshape result in column

Astair = reshape(Astair,[],1);

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