Create a sliding window
92 views (last 30 days)
Show older comments
Miguel Albuquerque on 2 Jul 2022
Commented: Matt J on 2 Jul 2022
Hey guys, thanks in advance
I have this code, that gives me a vector, samples , that has 10 000 000 values( a lot). I wanted to divide this vector in 500 000 samples do all the processing code I have , and choose the next 500 000 samples, with a sliding window, till i finished all the samples.
So first iteration I wanted samples(1:500 000), 2nd iteration(501000: 1000000), etc...
But with a sliding window function, can I do that
Image Analyst on 2 Jul 2022
Ten million samples is not a lot, but anyway a simple intuitive way is
for k = 1 : 500000 : length(vec) % Should be 20 iterations if vec is 10 million long.
thisWindow = vec(k : k + 499999);
% Now do something with thisWindow.
More Answers (1)
Edited: Matt J on 2 Jul 2022
This gives a matrix whose i-th window is matrix(:,i). How best to process that, though, depends on the specifics of the sliding window operation.
It can be faster. For example, if you are calculating the mean over each window,
mean( reshape(vector,5e5,) )
will be faster than looping.
Find more on Debugging and Analysis in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!Start Hunting!