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
Lia Kirtadze 2022-8-25
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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回答（1 个）

Bruno Luong
Bruno Luong 2022-8-25
编辑：Bruno Luong 2022-8-25
Ran in:
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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Bruno Luong
Bruno Luong 2022-8-25
编辑：Bruno Luong 2022-8-25
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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