How to create a sliding window function over column vector M

2019 11 24
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更新时间：2024 2 8
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If vector M is a column of 30000 points of temperature, How do I create a sliding window function that goes from 1 to 500, 2 to 501, 3 to 502 ...till the end. So the window length is 500.

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2 个投票

You can easily implement a loop for this
A = [1,2,3,4,5,6]'; % Easy vector to verify output
fun = @(x)mean(x); % Your function
WindowLength = 2;
Output = zeros(length(A)-WindowLength,1);
for idx = 1:length(A)-WindowLength
Block = A(idx:idx+WindowLength);
Output(idx) = fun(Block);
end
Output
Output =
2
3
4
5
Or, if you want to have it in many places, just create a function for it:
function output = SlideFun(x,WindowLength,fun)
Output = zeros(length(x)-WindowLength,1);
for idx = 1:length(x)-WindowLength
Block = x(idx:idx+WindowLength);
Output(idx) = fun(Block);
end
end

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Jeff
Jeff 2024-2-8
编辑：Jeff 2024-2-8
Since I found this and ran into this issue, maybe this will help someone else.
Output = zeros(length(x) + 1 - WindowLength,1);
for idx = 1:length(x) + 1 - WindowLength
Block = x(idx:idx + WindowLength - 1);
Output(idx) = fun(Block);
end

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