vectorization - Can someone help vectorise this matlab loop? -


i trying learn how vectorise matlab loops, im doing few small examples.

here standard loop trying vectorise:

function output = moving_avg(input, n)     output = [];     n = n:length(input) % iterate on y vector         summation = 0;             ii = n-(n-1):n % iterate on x vector n times                 summation += input(ii);             endfor         output(n) = summation/n;     endfor  endfunction

i have been able vectorise 1 loop, cant work out second loop. here have got far:

function output = moving_avg(input, n)     output = [];     n = n:length(input) % iterate on y vector         output(n) = mean(input(n-(n-1):n));     endfor  endfunction

can me simplify further?

edit:
input 1 dimensional vector , maximum 100 data points. n single integer, less size of input (typically around 5)

i don't intend use particular application, simple nested loop thought use learn vectorisation..

matlab language type of operation poorly - require outside o(n) loop/operation involving @ minimum o(k) copies not worth in performance vectorize further because matlab heavy weight language. instead, consider using filter function these things typically implemented in c makes type of operation free.


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