mean of matrix elements

hey all. i have a 5760x1 matrix. i need to find the average of the first 10 elements, remove the 10 elements and replave with the averaged number, find the average of the next 10 elements, remove those 10 elements and replace with average and so on.... could anyone give me an insight as to how to do this? much appreciated john

Answer 1

[Sean de Wolski]

B = mean(reshape(x,10,[]))'

Where x is your original column vector and B is the mean of every 10x1 chunk

Answer 2

[Andrew Reibold]

myMatrix = rand(5760,1)

for jj = 1:576
moving_avg(jj,1) = mean(myMatrix(jj*10-9:jj*10));
end

Will make a matrix called 'moving_avg' where each point represents the average of each set of 10 points.

Is that what you wanted? It will be 1/10 the size.

[Andrew Reibold]

Its very easy to replace every single point with the average too if thats what you need. (Same size, but every set of 10 numbers are all the same averaged number.)

Answer 3

[Andrei Bobrov]

I want have 'vote' too!

out = accumarray(ceil((1:numel(x))'/10),x(:),[],@mean);

[Sean de Wolski]

b=blkproc(rand(5760,1),[10,1],@mean)

I can't think of a solution shorter than my reshape one in terms of Code Golf?

[john creighton]

haha. yours works too...so well deserved 'vote' :)

Answer 4

[john creighton]

Both answers worked perfectly. Thanks guys. sorry can only accept one answer lol

[Sean de Wolski]

You can vote too :)