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

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?

Answer 1

[Bruno Luong]

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)

[Lia Kirtadze]

In this case final amount of elements are same, I want to replace eery five element by their mean and in this case overall emount of elements i matrix will be less then in original

[Lia Kirtadze]

and also my matrix is vertical

[Bruno Luong]

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);