# how do I average each 10 elements of a matrix?

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nadia naji on 21 Apr 2021
Commented: Walter Roberson on 21 Apr 2021
Hi,
I have an 80x1 vector and I need to average every 10 elements from first and save them to a new vector. do you have any suggestions except for the loop? (average of first 10 elements, an average of second 10 elements, ...). thank you.

Walter Roberson on 21 Apr 2021
mean10 = mean(reshape(Vector, 10, []),1)
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nadia naji on 21 Apr 2021
if the vector size is not dividable by 10, it will produce an error. is it a way for this problem?
Walter Roberson on 21 Apr 2021
frame_length = 10;
Veclen = length(Vector);
num_frame = floor(Veclen/frame_length);
num_extra = Veclen - num_frame * frame_length;
frame_means = [mean(reshape(Vector(1:end-num_extra), frame_length, []),1), mean(Vector(end-num_extra+1:end)]
This code is designed so that if there are left over samples at the end, then it takes the mean of what exists.