How could I create a sliding window of 300ms, with an overlap of 50ms?

Hello, I have an Emg data of 15mins length (1808331x12), sampling frequency : 2kHz. I want to apply a 300ms window(600samples) with an overlap of 20samples(10ms). I want 300ms segments so i can extract features from it.

Can somebody help me?

Answer 1

[Pratyush Roy]

Hi JJyh,

You can extract the data from individual windows and store them in a cell array. The following code might be helpful to understand how to store data from individual windows in a cell:

emg_data = randn([1808331,12]); % Here I have used random data since I don't have the original data on my end. This can be replaced by the data array that you are using.
[r c] = size(emg_data)
n_start = 1;
window_size = 600;
overlap_size = 20;
frame_cell = {};

while (n_start+window_size<=r)
    window = emg_data(n_start:n_start+window_size-1,:);
    frame_cell{end+1} = window;
    n_start = n_start + window_size - overlap_size;
end

Hope this helps!

[GOTOTO]

Thank you so muck ;)