how do I average each 10 elements of a matrix?

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nadia naji
nadia naji 2021-4-21
评论： Walter Roberson 2021-4-21
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.

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Walter Roberson
Walter Roberson 2021-4-21
mean10 = mean(reshape(Vector, 10, []),1)
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nadia naji
nadia naji 2021-4-21
if the vector size is not dividable by 10, it will produce an error. is it a way for this problem?
Walter Roberson
Walter Roberson 2021-4-21
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.

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