MATLAB: Average of array element at defined interval

average of element of array

Suppose,
a=[1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5]
i want to calculate average of group of five nos. so that my resulting array is like
avg=[3 3 3 3]
Can any one help me for the same.

Best Answer

Use the rehaspe function, then mean, since it takes the means of columns as its default behaviour:
a=[1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5];
ar = reshape(a, [], 4)
ar_mean = mean(ar)
produces:
ar =
       1     1     1     1
       2     2     2     2
       3     3     3     3
       4     4     4     4
       5     5     5     5
ar_mean =
       3     3     3     3
Related Question